From 1a6712e155bcaebf3c6025370d5ed2ed71afc2c5 Mon Sep 17 00:00:00 2001
From: Vittorio Distefano <info@vdistefano.studio>
Date: Thu, 21 May 2026 14:26:26 +0200
Subject: [PATCH 01/29] ci: add benchmark validation workflow

Add the repository CI workflow for both hosted GitHub Actions and the local Forgejo runner split. The Python jobs build the root virtualenv through the Makefile, compile all benchmark source trees, parse the TOML examples, and run the CVRP and employee model parity validators. The Rust jobs check formatting, clippy, and locked builds across the native adapter crates, with sibling SolverForge checkouts aligned to the current path dependencies.
---
 .github/workflows/ci.yml | 216 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 216 insertions(+)
 create mode 100644 .github/workflows/ci.yml

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..06ecb35
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,216 @@
+name: CI
+
+on:
+  push:
+    branches: [main, dev, release/*, feature/*]
+  pull_request:
+    branches: [main, dev, release/*]
+  workflow_dispatch:
+
+concurrency:
+  group: ci-${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+env:
+  CARGO_TERM_COLOR: always
+  BENCH_PYTHONPATH: src:list-variable/cvrp/src:scalar-variable/employee-scheduling/src
+
+jobs:
+  python-github:
+    if: ${{ github.server_url == 'https://github.com' }}
+    name: GitHub Python Harness
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v6
+        id: setup-python
+        with:
+          python-version: "3.14"
+
+      - name: Install Python dependencies
+        run: |
+          python -m pip install --upgrade pip
+          make install-python-deps HOST_PYTHON="${{ steps.setup-python.outputs.python-path }}"
+
+      - name: Check Python syntax
+        run: python -m compileall -q src list-variable/cvrp/src scalar-variable/employee-scheduling/src scripts
+
+      - name: Validate TOML configuration examples
+        run: |
+          python - <<'PY'
+          import pathlib
+          import tomllib
+
+          for path in pathlib.Path(".").glob("benchmark*.toml"):
+              with path.open("rb") as handle:
+                  tomllib.load(handle)
+              print(f"valid TOML: {path}")
+          PY
+
+      - name: Validate CVRP bundled instances
+        env:
+          PYTHONPATH: ${{ env.BENCH_PYTHONPATH }}
+        run: make validate-cvrp
+
+      - name: Validate employee-scheduling model parity
+        env:
+          PYTHONPATH: ${{ env.BENCH_PYTHONPATH }}
+        run: make validate-employee-model-parity
+
+  python-forgejo:
+    if: ${{ github.server_url != 'https://github.com' }}
+    name: Forgejo Python Harness
+    runs-on: python
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v6
+        id: setup-python
+        with:
+          python-version: "3.14"
+
+      - name: Install Python dependencies
+        run: |
+          python -m pip install --upgrade pip
+          make install-python-deps HOST_PYTHON="${{ steps.setup-python.outputs.python-path }}"
+
+      - name: Check Python syntax
+        run: python -m compileall -q src list-variable/cvrp/src scalar-variable/employee-scheduling/src scripts
+
+      - name: Validate TOML configuration examples
+        run: |
+          python - <<'PY'
+          import pathlib
+          import tomllib
+
+          for path in pathlib.Path(".").glob("benchmark*.toml"):
+              with path.open("rb") as handle:
+                  tomllib.load(handle)
+              print(f"valid TOML: {path}")
+          PY
+
+      - name: Validate CVRP bundled instances
+        env:
+          PYTHONPATH: ${{ env.BENCH_PYTHONPATH }}
+        run: make validate-cvrp
+
+      - name: Validate employee-scheduling model parity
+        env:
+          PYTHONPATH: ${{ env.BENCH_PYTHONPATH }}
+        run: make validate-employee-model-parity
+
+  rust-github:
+    if: ${{ github.server_url == 'https://github.com' }}
+    name: GitHub Rust Adapters
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: false
+      matrix:
+        crate:
+          - list-variable/cvrp/src/cvrp_bench/solver/solverforge
+          - list-variable/cvrp/src/cvrp_bench/solver/rustvrp
+          - scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/solverforge_nrp
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Checkout SolverForge path dependencies
+        run: |
+          rm -rf "$GITHUB_WORKSPACE/../solverforge"
+          rm -rf "$GITHUB_WORKSPACE/../solverforge-node-sharing"
+          git clone --depth 1 --branch v0.14.1 "${GITHUB_SERVER_URL:-https://github.com}/SolverForge/solverforge.git" "$GITHUB_WORKSPACE/../solverforge"
+          git clone --depth 1 --branch feat/node-sharing-compiler "${GITHUB_SERVER_URL:-https://github.com}/SolverForge/solverforge.git" "$GITHUB_WORKSPACE/../solverforge-node-sharing"
+
+      - name: Set up Python
+        uses: actions/setup-python@v6
+        id: setup-python
+        with:
+          python-version: "3.14"
+
+      - name: Set Python environment variables
+        run: |
+          echo "PYO3_PYTHON=${{ steps.setup-python.outputs.python-path }}" >> "$GITHUB_ENV"
+          echo "PYTHON_SYS_EXECUTABLE=${{ steps.setup-python.outputs.python-path }}" >> "$GITHUB_ENV"
+
+      - name: Install Rust
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          components: rustfmt, clippy
+
+      - name: Cache Rust artifacts
+        uses: Swatinem/rust-cache@v2
+        with:
+          workspaces: ${{ matrix.crate }}
+
+      - name: Check formatting
+        working-directory: ${{ matrix.crate }}
+        run: cargo fmt --all -- --check
+
+      - name: Run clippy
+        working-directory: ${{ matrix.crate }}
+        run: cargo clippy --locked --all-targets -- -D warnings
+
+      - name: Build
+        working-directory: ${{ matrix.crate }}
+        run: cargo build --locked
+
+  rust-forgejo:
+    if: ${{ github.server_url != 'https://github.com' }}
+    name: Forgejo Rust Adapters
+    runs-on: rust
+
+    strategy:
+      fail-fast: false
+      matrix:
+        crate:
+          - list-variable/cvrp/src/cvrp_bench/solver/solverforge
+          - list-variable/cvrp/src/cvrp_bench/solver/rustvrp
+          - scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/solverforge_nrp
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Checkout SolverForge path dependencies
+        run: |
+          rm -rf "$GITHUB_WORKSPACE/../solverforge"
+          rm -rf "$GITHUB_WORKSPACE/../solverforge-node-sharing"
+          git clone --depth 1 --branch v0.14.1 "${GITHUB_SERVER_URL:-https://github.com}/SolverForge/solverforge.git" "$GITHUB_WORKSPACE/../solverforge"
+          git clone --depth 1 --branch feat/node-sharing-compiler "${GITHUB_SERVER_URL:-https://github.com}/SolverForge/solverforge.git" "$GITHUB_WORKSPACE/../solverforge-node-sharing"
+
+      - name: Set up Python
+        uses: actions/setup-python@v6
+        id: setup-python
+        with:
+          python-version: "3.14"
+
+      - name: Set Python environment variables
+        run: |
+          echo "PYO3_PYTHON=${{ steps.setup-python.outputs.python-path }}" >> "$GITHUB_ENV"
+          echo "PYTHON_SYS_EXECUTABLE=${{ steps.setup-python.outputs.python-path }}" >> "$GITHUB_ENV"
+
+      - name: Install Rust
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          components: rustfmt, clippy
+
+      - name: Check formatting
+        working-directory: ${{ matrix.crate }}
+        run: cargo fmt --all -- --check
+
+      - name: Run clippy
+        working-directory: ${{ matrix.crate }}
+        run: cargo clippy --locked --all-targets -- -D warnings
+
+      - name: Build
+        working-directory: ${{ matrix.crate }}
+        run: cargo build --locked

From a169bee975bb2c872f327b06a9cb4ab158126ddb Mon Sep 17 00:00:00 2001
From: Vittorio Distefano <info@vdistefano.studio>
Date: Thu, 21 May 2026 14:26:30 +0200
Subject: [PATCH 02/29] build(db): add benchmark warehouse reset target

Add a Makefile target for resetting the configured benchmark PostgreSQL warehouse with sqlx. The target uses the same DATABASE_URL resolution as the existing check, create, and migrate helpers, and exposes DB_RESET_FLAGS so automation can keep the default non-interactive force reset while operators can override the sqlx flags when needed.
---
 Makefile | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index 31e4b82..5a18980 100644
--- a/Makefile
+++ b/Makefile
@@ -25,6 +25,7 @@ PYTHON ?= $(VENV)/bin/python3
 PIP ?= $(VENV)/bin/pip
 DATABASE_URL ?= $(if $(BENCH_DATABASE_URL),$(BENCH_DATABASE_URL),postgresql://postgres@localhost/solverforge_bench)
 SQLX ?= sqlx
+DB_RESET_FLAGS ?= -y -f
 BENCH_ARGS ?=
 BENCH_CONFIG ?=
 NIGHTLY_ARGS ?=
@@ -70,7 +71,7 @@ MAVEN_ENV := JAVA_HOME="$(JAVA_HOME_FOR_MAVEN)" PATH="$(JAVA_HOME_FOR_MAVEN)/bin
 	bench-employee-scheduling-solverforge-quick bench-employee-scheduling-solverforge-quick-db \
 	bench-nightly-db \
 	validate-cvrp validate-employee-scheduling validate-employee-model-parity \
-	db-check db-create db-migrate normalize-results
+	db-check db-create db-migrate db-reset normalize-results
 
 # ============== Default Target ==============
 .DEFAULT_GOAL := venv
@@ -109,6 +110,9 @@ db-create: banner
 db-migrate: db-create
 	$(SQLX) migrate run --source migrations --database-url "$(DATABASE_URL)"
 
+db-reset: banner
+	$(SQLX) database reset --source migrations --database-url "$(DATABASE_URL)" $(DB_RESET_FLAGS)
+
 $(ORTOOLS_ROOT)/lib64/cmake/ortools/ortoolsConfig.cmake:
 	mkdir -p build/ortools
 	curl -L --fail --retry 3 -o build/ortools/$(ORTOOLS_ARCHIVE) "$(ORTOOLS_URL)"

From 0ae991ae97752229c9540555237c98f3851ef774 Mon Sep 17 00:00:00 2001
From: Vittorio Distefano <info@vdistefano.studio>
Date: Thu, 21 May 2026 14:26:35 +0200
Subject: [PATCH 03/29] docs(bench): map benchmark repository contracts

Add the root wireframe as the as-built map for the benchmark repository and link it from the operator and archive documentation. The documentation now records the shared harness ownership boundaries, active benchmark packages, CI split, path dependency expectations, CPU-pinned run behavior, database reset helper, nightly/config argument flow, and the employee-scheduling terminology that should remain current.
---
 AGENTS.md         |  57 +++++++++++--
 README.md         |  69 +++++++++++++--
 WIREFRAME.md      | 211 ++++++++++++++++++++++++++++++++++++++++++++++
 archive/README.md |   4 +-
 4 files changed, 328 insertions(+), 13 deletions(-)
 create mode 100644 WIREFRAME.md

diff --git a/AGENTS.md b/AGENTS.md
index 59eff1a..1bfa0a7 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -3,6 +3,16 @@
 ## Project Structure & Module Organization
 
 - `pyproject.toml` declares shared Python dependencies and package discovery.
+- `README.md` is the operator guide. `WIREFRAME.md` is the as-built
+  repository/data-flow map. Keep both aligned with this file when public
+  behavior or structure changes.
+- `.github/workflows/ci.yml` contains the split GitHub/Forgejo CI workflow.
+  Keep its sibling SolverForge checkout paths aligned with the active adapter
+  `Cargo.toml` path dependencies. The Rust jobs must clone SolverForge
+  `v0.14.1` into `../solverforge`, clone `feat/node-sharing-compiler` into
+  `../solverforge-node-sharing`, and run Cargo checks with `--locked`; the
+  Python jobs must create the root `.venv` with `make install-python-deps`
+  before parity validation.
 - `src/solverforge_bench/` contains the shared benchmark framework. CLI,
   TOML configuration, registry, run matrix, timing, overshoot calculation,
   watchdog containment, result rows, CSV writing, production logging, solver
@@ -24,16 +34,33 @@
   creates the single repository virtualenv used by all benchmark commands.
 - `make install-python-deps` creates or refreshes that root `.venv` from the
   Makefile.
+- The CVRP SolverForge adapter is pinned to SolverForge `0.14.1` and currently
+  uses the sibling checkout at `../solverforge/crates/solverforge`. The
+  employee-scheduling SolverForge adapter uses the `0.15.0` node-sharing
+  compiler branch at `../solverforge-node-sharing/crates/solverforge`.
+- Benchmark run targets pin the shared harness with `taskset -c $(BENCH_CPU)`;
+  `BENCH_CPU` defaults to `0`. They also set `OMP_NUM_THREADS=1` and
+  `MKL_NUM_THREADS=1`.
 - `make validate-cvrp` validates all bundled CVRP `.vrp`/`.sol` pairs.
+- `make build-cvrp` builds Python dependencies plus CVRP Timefold, SolverForge,
+  OR-Tools, rustvrp, and VROOM integrations.
 - `make bench-cvrp-quick` builds CVRP native integrations and runs a small sample.
   It uses all registered CVRP solvers.
 - `make bench-cvrp-quick-db` does the same quick CVRP run, applies database
   migrations first, and persists the run to PostgreSQL.
 - `make bench-cvrp-solverforge-quick` runs only SolverForge CVRP on three instances with 1s and 10s limits.
+- `make bench-cvrp-solverforge-quick-db` persists that same SolverForge-only
+  CVRP smoke path after applying migrations.
+- `make build-employee-scheduling` builds Python dependencies plus employee
+  Timefold, SolverForge, and OR-Tools integrations.
 - `make bench-employee-scheduling-quick` runs a small INRC2 sample.
 - `make bench-employee-scheduling-quick-db` does the same quick
   employee-scheduling run, applies database migrations first, and persists the
   run to PostgreSQL.
+- `make bench-employee-scheduling-solverforge-quick` runs only SolverForge on
+  the same quick employee-scheduling sample.
+- `make bench-employee-scheduling-solverforge-quick-db` persists that same
+  SolverForge-only employee-scheduling smoke path after applying migrations.
 - `make bench-nightly-db` is the cronable nightly entrypoint: it builds both
   benchmark stacks, applies migrations once, then invokes the canonical root
   harness directly for CVRP and employee scheduling. It uses
@@ -44,10 +71,13 @@
   the same hard-feasibility clauses, candidate domains, and soft objective
   weights.
 - `make bench-cvrp` and `make bench-employee-scheduling` run the broader benchmark suites and may take longer.
-- `make db-check`, `make db-create`, and `make db-migrate` check, create, and
-  migrate the PostgreSQL benchmark warehouse configured by `DATABASE_URL`, or
-  `BENCH_DATABASE_URL` when `DATABASE_URL` is unset. The default URL is
-  `postgresql://postgres@localhost/solverforge_bench`.
+- `make db-check`, `make db-create`, `make db-migrate`, and `make db-reset`
+  check, create, migrate, and reset the PostgreSQL benchmark warehouse
+  configured by `DATABASE_URL`, or `BENCH_DATABASE_URL` when `DATABASE_URL` is
+  unset. The default URL is `postgresql://postgres@localhost/solverforge_bench`.
+  `make db-reset` passes `DB_RESET_FLAGS ?= -y -f` to SQLx by default.
+- `make normalize-results INPUT=... OUTPUT=...` normalizes generated global CSV
+  artifacts through Polars. Pass `ARGS="--format ndjson"` for NDJSON output.
 - `PYTHONPATH=src:list-variable/cvrp/src:scalar-variable/employee-scheduling/src .venv/bin/python3 scripts/run_benchmark.py <benchmark>` runs the unified root harness directly.
 - Add `--config benchmark.example.toml` or `BENCH_CONFIG=benchmark.example.toml`
   to load TOML configuration. Command-line options override TOML values.
@@ -58,6 +88,9 @@
   `--show-solver-output|--no-show-solver-output`, and
   `--capture-solver-output|--no-capture-solver-output` for logging behavior.
   Logging policy belongs to `src/solverforge_bench/`, not to benchmark adapters.
+- Use `BENCH_ARGS` to append child harness options to normal benchmark Make
+  targets. Use `NIGHTLY_ARGS` for `make bench-nightly-db`; if `NIGHTLY_ARGS`
+  includes `--config`, it overrides the Makefile's nightly config selection.
 
 ## Coding Style & Naming Conventions
 
@@ -73,6 +106,10 @@ also run `make db-migrate` and at least one `*-db` dry run or smoke run. When
 adding a dataset or solver, include a small deterministic run and confirm
 failures are solution failures, not loader or adapter errors.
 
+For CI or documentation contract changes, also verify Python syntax with
+`python -m compileall -q src list-variable/cvrp/src scalar-variable/employee-scheduling/src scripts`
+and parse `benchmark*.toml` with `tomllib` or an equivalent TOML parser.
+
 ## Commit & Pull Request Guidelines
 
 Use concise Conventional Commit subjects, for example `docs: add contributor guide` or `fix: correct cvrp validation`, with a body when behavior or interpretation changes. Pull requests should describe the scenario, commands run, generated files, and solver/runtime assumptions. Avoid committing generated CSVs unless they are intentional evidence artifacts.
@@ -81,11 +118,19 @@ Use concise Conventional Commit subjects, for example `docs: add contributor gui
 
 Keep changes tightly scoped. For documentation-only requests, update
 documentation only; do not modify solver adapters, benchmark runner behavior,
-generated result handling, or build flow. For benchmark execution changes,
-preserve one shared framework: problem adapters may load data, create solvers,
+generated result handling, CI, or build flow. When the request names
+`README.md`, `AGENTS.md`, or wireframes, include root `README.md`, root
+`AGENTS.md`, root `WIREFRAME.md`, and any additional tracked `WIREFRAME.md` or
+`wireframe.md` files in the audit. For benchmark execution changes, preserve one
+shared framework: problem adapters may load data, create solvers,
 validate/evaluate solutions, and expose native fields, but must not own
 orchestration loops, timing policy, watchdog policy, CSV policy, TOML
 configuration policy, logging policy, solver-output capture policy, or
 PostgreSQL persistence policy. The nominal benchmark budget is not a hard kill
 deadline; preserve late returned solutions and record overshoot. Only the
 separate watchdog may terminate runaway processes.
+
+Do not reintroduce `standard-variable`, `CoverageGroup`, `coverage_first_fit`,
+or benchmark-local scoring internals for employee scheduling. The active
+terminology is `scalar-variable/employee-scheduling`, and the active SolverForge
+adapter uses public SolverForge scalar/list APIs.
diff --git a/README.md b/README.md
index 116d579..5ca78ff 100644
--- a/README.md
+++ b/README.md
@@ -8,6 +8,7 @@ result rows, CSV writing, production logging, solver stdout/stderr capture, and
 optional PostgreSQL persistence. Problem packages are adapters: they load/select
 cases, create solver callables, validate/evaluate returned solutions, and expose
 native fields.
+See `WIREFRAME.md` for the current as-built repository map.
 
 ## Benchmarks
 
@@ -19,6 +20,15 @@ native fields.
   uses the bundled INRC-II TXT corpus and compares `solverforge`,
   `timefold`, and `ortools` on nurse-to-shift assignments.
 
+## Documentation Map
+
+- `README.md` is the operator guide for setup, benchmark commands, configuration,
+  persistence, and result schema.
+- `AGENTS.md` is the maintainer and agent contract for scoped changes.
+- `WIREFRAME.md` is the current as-built structure and data-flow map.
+- `archive/README.md` marks archived reports and standalone scripts as
+  historical material only.
+
 ## Setup
 
 Create the repository virtualenv and install every benchmark dependency into it:
@@ -31,7 +41,37 @@ pip install -e .
 
 The root Makefile uses this same `.venv` for CVRP, employee scheduling,
 normalization, and nightly runs. `make install-python-deps` creates or refreshes
-it before benchmark builds.
+it before benchmark builds and is the CI-safe entrypoint for scripts that
+bootstrap themselves through the repository virtualenv.
+
+The CVRP SolverForge benchmark adapter is pinned to SolverForge `0.14.1` and
+uses the sibling local checkout at `../solverforge/crates/solverforge`. The
+employee-scheduling SolverForge adapter uses the `0.15.0` node-sharing compiler
+branch at `../solverforge-node-sharing/crates/solverforge`. Keep CI or local
+bootstrap checkouts aligned to those Cargo paths.
+
+Benchmark run targets execute the shared harness through `taskset` on
+`BENCH_CPU`, which defaults to CPU `0`, and set `OMP_NUM_THREADS=1` plus
+`MKL_NUM_THREADS=1`. Override `BENCH_CPU` for a different pinned core.
+
+## CI
+
+`.github/workflows/ci.yml` defines separate jobs for GitHub-hosted Actions and
+local Forgejo runners. The Python jobs set up Python 3.14, create the root
+`.venv` with `make install-python-deps HOST_PYTHON=...`, compile the source
+trees, parse `benchmark*.toml`, run `make validate-cvrp`, and run
+`make validate-employee-model-parity`. The parity script requires that root
+`.venv`, so CI must use the Makefile bootstrap instead of a detached
+`python -m pip install -e .`.
+
+The Rust jobs clone SolverForge tag `v0.14.1` into
+`$GITHUB_WORKSPACE/../solverforge` and clone `feat/node-sharing-compiler` into
+`$GITHUB_WORKSPACE/../solverforge-node-sharing`, matching the active adapter
+`Cargo.toml` path dependencies. They set the PyO3 Python environment from
+`actions/setup-python`, then run formatting,
+`cargo clippy --locked --all-targets -- -D warnings`, and `cargo build --locked`
+for the CVRP SolverForge adapter, CVRP rustvrp adapter, and employee scheduling
+SolverForge adapter.
 
 ## CVRP Commands
 
@@ -41,11 +81,13 @@ Run CVRP validation and smoke benchmarks from the repository root:
 make validate-cvrp
 make bench-cvrp-quick
 make bench-cvrp-solverforge-quick
+make bench-cvrp-solverforge-quick-db
 ```
 
 `bench-cvrp-quick` uses all registered CVRP solvers on three instances at `1`
-and `10` seconds. `bench-cvrp-solverforge-quick` keeps the SolverForge-only
-development smoke path.
+and `10` seconds. The `bench-cvrp-solverforge-*` targets keep the
+SolverForge-only development smoke path, with the `-db` variant applying
+migrations and persisting the same run to PostgreSQL.
 
 Run the full CVRP benchmark:
 
@@ -89,11 +131,15 @@ Run the quick and canonical employee-scheduling benchmarks:
 
 ```sh
 make bench-employee-scheduling-quick
+make bench-employee-scheduling-solverforge-quick
+make bench-employee-scheduling-solverforge-quick-db
 make bench-employee-scheduling
 ```
 
 The quick target runs `n005w4` for `solverforge`, `timefold`, and `ortools`
-at `1` and `10` seconds.
+at `1` and `10` seconds. The SolverForge-only quick target runs the same slice
+with only `solverforge`, and the `-db` variant applies migrations and persists
+the run.
 The canonical target uses the `canonical` group in
 `scalar-variable/employee-scheduling/data/inrc2/manifest.json`.
 
@@ -224,6 +270,11 @@ non-tag run kind is rejected. Make targets accept the same file through
 make bench-cvrp-quick BENCH_CONFIG=benchmark.example.toml
 ```
 
+Append child harness options with `BENCH_ARGS`, or for the two-benchmark
+nightly target with `NIGHTLY_ARGS`. `NIGHTLY_ARGS` may supply its own
+`--config`; otherwise `make bench-nightly-db` uses `BENCH_CONFIG` when set and
+falls back to `benchmark.nightly.example.toml`.
+
 Set `nightly = true` for cron-driven runs that should be kept distinct from
 normal runs with the same `run_kind`. Set `[postgres].save = true` or pass
 `--save-postgres` to persist with the configured URL. A TOML PostgreSQL URL by
@@ -255,9 +306,15 @@ Prepare the database and apply migrations:
 make db-check
 make db-create
 make db-migrate
+make db-reset
 ```
 
-`db-migrate` requires `sqlx-cli` on `PATH`:
+`db-reset` drops the configured database, recreates it, and runs migrations.
+It passes `-y -f` by default so the helper works from non-interactive shells
+and terminates existing PostgreSQL sessions on the benchmark database.
+Override SQLx flags with `DB_RESET_FLAGS` when needed.
+
+The database targets require `sqlx-cli` on `PATH`:
 
 ```sh
 cargo install sqlx-cli --no-default-features --features postgres
@@ -293,7 +350,7 @@ make bench-cvrp-quick
 make bench-cvrp-quick-db
 make bench-employee-scheduling-quick
 make bench-employee-scheduling-quick-db
-make bench-cvrp-db BENCH_ARGS="--run-kind tag --release-tag v0.11.1"
+make bench-cvrp-db BENCH_ARGS="--run-kind tag --release-tag v0.14.1"
 make bench-cvrp-db BENCH_ARGS="--run-kind quick --nightly"
 make bench-nightly-db
 ```
diff --git a/WIREFRAME.md b/WIREFRAME.md
new file mode 100644
index 0000000..60eb763
--- /dev/null
+++ b/WIREFRAME.md
@@ -0,0 +1,211 @@
+# SolverForge Bench Wireframe
+
+This is the as-built map for the current benchmark repository. It is a
+documentation contract: when source layout, benchmark ownership, run flow,
+persistence, or CI changes, update this file with `README.md` and `AGENTS.md`.
+
+## Repository Surfaces
+
+- `pyproject.toml` declares the Python 3.14 package, shared dependencies, and
+  package discovery across `src/`, `list-variable/cvrp/src/`, and
+  `scalar-variable/employee-scheduling/src/`.
+- `Makefile` is the root build and execution surface. It owns virtualenv setup,
+  native adapter builds, benchmark smoke/full runs, database helpers,
+  normalization, the SolverForge banner, and CPU-pinned harness execution.
+- `src/solverforge_bench/` is the shared framework. It owns CLI parsing, TOML
+  loading, benchmark registry, run matrix construction, timed execution,
+  watchdog containment, row construction, CSV writing, logging, solver output
+  capture, solver-version collection, ETL, and optional PostgreSQL writes.
+- `scripts/run_benchmark.py` and benchmark-local validation scripts bootstrap
+  through `scripts/_venv_bootstrap.py` when they require the repository
+  virtualenv.
+- `list-variable/cvrp/` is the list-variable benchmark package for CVRP.
+- `scalar-variable/employee-scheduling/` is the scalar-variable benchmark
+  package for INRC-II nurse scheduling.
+- `migrations/` holds SQLx-compatible PostgreSQL warehouse migrations.
+- `.github/workflows/ci.yml` holds the split GitHub/Forgejo CI workflow.
+- `archive/` holds historical reports and older standalone scripts only.
+
+## Shared Harness Flow
+
+1. `scripts/run_benchmark.py` bootstraps into the root `.venv`, adds the three
+   source roots to `sys.path`, and delegates to `solverforge_bench.cli.main`.
+   `scripts/verify_model_parity.py` uses the same virtualenv bootstrap before
+   importing the employee-scheduling package.
+2. `cli.py` loads optional TOML configuration, selects the benchmark spec,
+   applies CLI overrides, finalizes run catalog fields, validates solver names,
+   and passes the selected spec to `runner.py`.
+3. `registry.py` exposes the canonical benchmark specs: `cvrp` and
+   `employee-scheduling`.
+4. `runner.py` resolves cases, time limits, solvers, solver versions, output
+   paths, artifact paths, run logs, and solver output paths. It then iterates
+   `case -> time_limit -> solver`.
+5. `execution.py` runs each solver in a child process. The nominal time limit is
+   passed to the solver; it is not the hard kill deadline. The watchdog only
+   terminates runaway processes after `max(time_limit * multiplier,
+   time_limit + grace_seconds)`.
+6. Each benchmark spec validates and evaluates returned solutions, then the
+   shared runner writes an incremental CSV row and, when enabled, a PostgreSQL
+   row.
+7. Solver exceptions, including `NoSolutionFoundError`, become result rows with
+   `run_error`. CSV or PostgreSQL write failures remain fatal output-integrity
+   failures.
+
+## Benchmark Specs
+
+| Spec | Category | Default solvers | Default time limits | Native columns |
+| --- | --- | --- | --- | --- |
+| `cvrp` | `list_variable` | `pyvrp`, `ortools`, `vroom`, `timefold`, `rustvrp`, `pyhygese`, `solverforge` | `1`, `10`, `60` | none |
+| `employee-scheduling` | `scalar_variable` | `solverforge`, `timefold`, `ortools` | `1`, `10`, `60` | `nurses`, `weeks`, `validator_model_delta`, `score_drift` |
+
+## CVRP Adapter Shape
+
+- Data lives under `list-variable/cvrp/data/X/` as CVRPLIB-X `.vrp` and `.sol`
+  pairs.
+- `spec.py` exposes dataset `CVRPLIB-X`, dataset set `canonical`, and
+  `--num-instances` for smoke selection.
+- `domain/models.py` defines Pydantic instance and solution contracts.
+- `domain/utils.py` validates route feasibility and cost.
+- `solver/solver.py` registers `pyvrp`, `ortools`, `vroom`, `timefold`,
+  `rustvrp`, `pyhygese`, and `solverforge`.
+- Native solver builds are rooted in `solver/ortools/`, `solver/rustvrp/`,
+  `solver/vroom/`, `solver/timefold/`, and `solver/solverforge/`.
+- The SolverForge CVRP adapter is pinned to SolverForge `0.14.1` and resolves
+  the sibling checkout at `../solverforge/crates/solverforge` from the
+  repository root.
+- The CVRP model uses public SolverForge CVRP list-variable hooks:
+  `VrpSolution`, matrix distance meters, route get/set/depot hooks, route
+  metric classes, route distance, and route feasibility. The benchmark budget
+  is applied through the model config provider.
+- `solverforge/solver.toml` uses reproducible mode, seed `42`, a 60 second
+  internal termination cap, list construction phases, and a local-search union
+  of nearby list moves, reverse moves, k-opt, ruin, and limited-neighborhood
+  sublist change moves.
+- Native OR-Tools no-solution exits are normalized to `NoSolutionFoundError`
+  rather than benchmark-aborting runtime errors.
+
+## Employee Scheduling Adapter Shape
+
+- Data lives under `scalar-variable/employee-scheduling/data/inrc2/` as bundled
+  INRC-II scenario, history, week-data, and reference solution TXT files.
+- `manifest.json` defines dataset groups: `quick` has 1 group and 3 cases,
+  `test_with_solutions` has 3 groups and 9 cases, `canonical` has 14 groups and
+  42 cases, and `late` has 6 groups and 18 cases.
+- `loader.py` parses INRC-II TXT files and enumerates concrete cases.
+- `validation.py` is the shared Python referee. It checks hard constraints first
+  and then computes the soft-cost breakdown.
+- `scripts/verify_model_parity.py` verifies that the Python validator,
+  OR-Tools model, Timefold model, and SolverForge model encode the same model
+  contract.
+- `spec.py` exposes `--dataset-set` and `--datasets`, writes solution JSON
+  artifacts for hard-feasible runs, and reports validator/model deltas through
+  native columns.
+- `solver/solver.py` registers `solverforge`, `timefold`, and `ortools`.
+- The SolverForge NRP adapter is pinned to SolverForge `0.15.0` with `serde`
+  enabled and resolves the node-sharing compiler sibling checkout at
+  `../solverforge-node-sharing/crates/solverforge` from the repository root.
+- The SolverForge NRP model uses public scalar APIs: per-shift candidate
+  values, unassigned scalar variables for optional slots, nearby value/entity
+  candidates, and one `ScalarGroup::assignment` for required minimum slots,
+  one nurse per day capacity, adjacent forbidden-succession assignment rules,
+  ordered shift positions, and nurse sequence keys.
+- `solverforge_nrp/solver.toml` sets `environment_mode = "non_reproducible"`
+  and `random_seed = 1`. It intentionally does not impose an independent
+  termination cap; the shared harness passes the requested benchmark budget.
+
+## Makefile Contract
+
+- `make install-python-deps` creates or refreshes the root `.venv`.
+- `make build-cvrp` builds Python dependencies plus CVRP Timefold, SolverForge,
+  OR-Tools, rustvrp, and VROOM integrations.
+- `make build-employee-scheduling` builds Python dependencies plus employee
+  Timefold, SolverForge, and OR-Tools integrations.
+- `make bench-cvrp-quick` runs three CVRP instances at 1 and 10 seconds with
+  all registered CVRP solvers.
+- `make bench-cvrp-quick-db` runs the same CVRP smoke path after applying
+  migrations and persists it to PostgreSQL.
+- `make bench-cvrp-solverforge-quick` runs the same quick CVRP slice with only
+  SolverForge.
+- `make bench-cvrp-solverforge-quick-db` persists that same SolverForge-only
+  CVRP smoke path after applying migrations.
+- `make bench-employee-scheduling-quick` runs `n005w4` at 1 and 10 seconds with
+  all registered employee-scheduling solvers.
+- `make bench-employee-scheduling-quick-db` runs the same employee smoke path
+  after applying migrations and persists it to PostgreSQL.
+- `make bench-employee-scheduling-solverforge-quick` runs the same quick
+  employee slice with only SolverForge.
+- `make bench-employee-scheduling-solverforge-quick-db` persists that same
+  SolverForge-only employee smoke path after applying migrations.
+- `make bench-cvrp` and `make bench-employee-scheduling` run canonical
+  benchmark paths at 1, 10, and 60 seconds.
+- `make bench-nightly-db` builds both benchmark stacks, applies migrations once,
+  and invokes the root harness once for CVRP and once for employee scheduling.
+- `make db-check`, `make db-create`, `make db-migrate`, and `make db-reset`
+  operate on `DATABASE_URL`, then `BENCH_DATABASE_URL`, then
+  `postgresql://postgres@localhost/solverforge_bench`.
+- `make normalize-results` converts generated global CSV artifacts to normalized
+  CSV or NDJSON through `scripts/normalize_results.py`.
+- Benchmark run targets use `taskset -c $(BENCH_CPU)` with `BENCH_CPU ?= 0` and
+  set `OMP_NUM_THREADS=1` and `MKL_NUM_THREADS=1`.
+- Override child harness arguments with `BENCH_ARGS`, nightly child arguments
+  with `NIGHTLY_ARGS`, config path with `BENCH_CONFIG`, and SQLx reset flags
+  with `DB_RESET_FLAGS`.
+
+## Configuration Contract
+
+- Root TOML keys are `benchmark`, `solver`, `time_limits`,
+  `wall_time_tolerance`, `watchdog_multiplier`, `watchdog_grace_seconds`,
+  `output`, `run_kind`, `nightly`, and `release_tag`.
+- `[postgres]` accepts `save` and `url`.
+- `[logging]` accepts `level`, `dir`, `file`, `show_solver_output`, and
+  `capture_solver_output`.
+- `[benchmarks.cvrp]` accepts `num_instances`.
+- `[benchmarks.employee-scheduling]` accepts `dataset_set` and `datasets`.
+- `run_kind` is one of `quick`, `candidate`, or `tag`; `tag` requires
+  `release_tag`.
+- A CLI `--postgres-url` enables PostgreSQL persistence unless
+  `--no-save-postgres` is also supplied. A TOML PostgreSQL URL alone does not.
+
+## Output And Persistence
+
+- CSV output uses one global snake_case schema with stable optional native
+  columns.
+- `BenchmarkRow.as_dict()` emits core fields and merges native fields.
+- CVRP output defaults to `list-variable/cvrp/data/benchmark_cvrp_<stamp>.csv`.
+- Employee scheduling output defaults to
+  `scalar-variable/employee-scheduling/data/benchmark_employee_scheduling_<stamp>.csv`.
+- Employee scheduling solution artifacts are written under
+  `scalar-variable/employee-scheduling/data/artifacts/employee_scheduling_<stamp>/`.
+- PostgreSQL stores run catalog rows in `benchmark_runs`, solver-version rows in
+  `benchmark_solver_versions`, and result rows in `benchmark_results`.
+- `benchmark_result_facts`, `latest_benchmark_runs`, and
+  `latest_benchmark_result_facts` are the display-facing warehouse views.
+- Completed result rows are written immediately. Interrupted runs keep partial
+  rows but are excluded from latest-run views unless their run status is
+  completed.
+
+## CI Contract
+
+- Python CI runs on `ubuntu-latest` for GitHub and `python` runner labels for
+  Forgejo.
+- Rust CI runs on `ubuntu-latest` for GitHub and `rust` runner labels for
+  Forgejo.
+- Python CI uses `actions/setup-python@v6` with Python 3.14, creates the root
+  `.venv` through `make install-python-deps HOST_PYTHON=...`, compiles Python
+  source, parses benchmark TOML examples, validates bundled CVRP instances, and
+  validates employee model parity.
+- Rust CI clones SolverForge tag `v0.14.1` into
+  `$GITHUB_WORKSPACE/../solverforge` and clones `feat/node-sharing-compiler`
+  into `$GITHUB_WORKSPACE/../solverforge-node-sharing`, the exact relative paths
+  declared by the active adapter `Cargo.toml` files. It checks formatting, runs
+  `cargo clippy --locked --all-targets -- -D warnings`, and runs
+  `cargo build --locked` for the CVRP SolverForge adapter, CVRP rustvrp
+  adapter, and employee SolverForge adapter.
+
+## Generated Artifacts
+
+- The ignored build and output surfaces are `.venv/`, `__pycache__/`, Python
+  package/build outputs, Rust/Java `target/` outputs, `logs/*`, generated
+  benchmark CSVs, and generated solution artifact directories.
+- Generated CSVs are evidence artifacts. Commit them only when the run output is
+  intentionally part of the change.
diff --git a/archive/README.md b/archive/README.md
index b26a95a..3235027 100644
--- a/archive/README.md
+++ b/archive/README.md
@@ -6,6 +6,7 @@ scripts. It is not the active benchmark surface.
 Active benchmark execution lives at the repository root:
 
 ```sh
+make install-python-deps
 make bench-cvrp-quick
 make bench-employee-scheduling-quick
 PYTHONPATH=src:list-variable/cvrp/src:scalar-variable/employee-scheduling/src \
@@ -15,7 +16,8 @@ PYTHONPATH=src:list-variable/cvrp/src:scalar-variable/employee-scheduling/src \
 The current framework owns CLI parsing, TOML configuration, run matrix
 construction, timing, overshoot calculation, watchdog containment, CSV writing,
 and optional PostgreSQL persistence from `src/solverforge_bench/`. See the root
-`README.md` for supported commands and schema details.
+`README.md` for supported commands and schema details, and `WIREFRAME.md` for
+the current as-built repository map.
 
 Files in `archive/` may describe older server-based experiments, older report
 formats, or deprecated quickstart paths. Do not use them as implementation

From b927cf3fcbf46a16ddefcfd1ddbe6b8371f8ec71 Mon Sep 17 00:00:00 2001
From: Vittorio Distefano <info@vdistefano.studio>
Date: Thu, 21 May 2026 14:26:46 +0200
Subject: [PATCH 04/29] fix(cvrp): classify native OR-Tools no-solution exits

Map the native OR-Tools solver's explicit no-solution stderr message to the shared NoSolutionFoundError contract. This keeps a solver that cleanly reports no incumbent from aborting the entire benchmark run as an infrastructure failure, while preserving nonzero exits with any other stderr as runtime errors.
---
 list-variable/cvrp/src/cvrp_bench/solver/ortools/__init__.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/list-variable/cvrp/src/cvrp_bench/solver/ortools/__init__.py b/list-variable/cvrp/src/cvrp_bench/solver/ortools/__init__.py
index a637e60..d2d19f3 100644
--- a/list-variable/cvrp/src/cvrp_bench/solver/ortools/__init__.py
+++ b/list-variable/cvrp/src/cvrp_bench/solver/ortools/__init__.py
@@ -4,8 +4,10 @@
 from pathlib import Path
 
 from cvrp_bench.domain.models import Instance, Solution
+from solverforge_bench.model import NoSolutionFoundError
 
 _BINARY_PATH = Path(__file__).parent / "target" / "cvrp_ortools"
+_NO_SOLUTION_MESSAGE = "OR-Tools found no CVRP solution"
 
 
 def solve_with_ortools(instance: Instance, time_limit: int) -> Solution:
@@ -29,6 +31,8 @@ def solve_with_ortools(instance: Instance, time_limit: int) -> Solution:
     )
     stderr = result.stderr.decode()
     if result.returncode != 0:
+        if stderr.strip() == _NO_SOLUTION_MESSAGE:
+            raise NoSolutionFoundError(_NO_SOLUTION_MESSAGE)
         raise RuntimeError(
             f"native OR-Tools solver failed (exit {result.returncode}):\n{stderr}"
         )

From d9981088f2d992889f1e18c22538c5871914941a Mon Sep 17 00:00:00 2001
From: Vittorio Distefano <info@vdistefano.studio>
Date: Thu, 21 May 2026 14:26:55 +0200
Subject: [PATCH 05/29] feat(cvrp): align SolverForge adapter with route API

Move the CVRP SolverForge adapter to the 0.14.1 local checkout and update its planning-solution attributes to the unified route hook names. The model now declares route get/set/depot, route metric class, route distance, and route feasibility hooks instead of the older Clarke-Wright and k-opt-specific function set, matching the current public SolverForge CVRP API while keeping the Python benchmark wrapper contract unchanged.
---
 .../cvrp/src/cvrp_bench/solver/solverforge.py    |  2 +-
 .../src/cvrp_bench/solver/solverforge/Cargo.lock | 16 ++++++++--------
 .../src/cvrp_bench/solver/solverforge/Cargo.toml |  2 +-
 .../cvrp_bench/solver/solverforge/src/domain.rs  | 15 ++++++---------
 4 files changed, 16 insertions(+), 19 deletions(-)

diff --git a/list-variable/cvrp/src/cvrp_bench/solver/solverforge.py b/list-variable/cvrp/src/cvrp_bench/solver/solverforge.py
index d6c9c62..8699e33 100644
--- a/list-variable/cvrp/src/cvrp_bench/solver/solverforge.py
+++ b/list-variable/cvrp/src/cvrp_bench/solver/solverforge.py
@@ -7,7 +7,7 @@
 
 def solve_with_solverforge(instance: Instance, time_limit: int) -> Solution:
     """
-    Solve the CVRP using the SolverForge 0.8.6 retained list-variable runtime.
+    Solve the CVRP using the SolverForge 0.14.1 retained list-variable runtime.
 
     The Rust crate keeps the benchmark-facing contract thin:
       - Hard: every customer must be assigned exactly once and every route must
diff --git a/list-variable/cvrp/src/cvrp_bench/solver/solverforge/Cargo.lock b/list-variable/cvrp/src/cvrp_bench/solver/solverforge/Cargo.lock
index 07541b3..de49831 100644
--- a/list-variable/cvrp/src/cvrp_bench/solver/solverforge/Cargo.lock
+++ b/list-variable/cvrp/src/cvrp_bench/solver/solverforge/Cargo.lock
@@ -516,12 +516,12 @@ dependencies = [
  "pyo3",
  "serde",
  "serde_json",
- "solverforge 0.13.1",
+ "solverforge 0.14.1",
 ]
 
 [[package]]
 name = "solverforge"
-version = "0.13.1"
+version = "0.14.1"
 dependencies = [
  "solverforge-config",
  "solverforge-core",
@@ -534,7 +534,7 @@ dependencies = [
 
 [[package]]
 name = "solverforge-config"
-version = "0.13.1"
+version = "0.14.1"
 dependencies = [
  "serde",
  "serde_yaml",
@@ -545,21 +545,21 @@ dependencies = [
 
 [[package]]
 name = "solverforge-core"
-version = "0.13.1"
+version = "0.14.1"
 dependencies = [
  "thiserror",
 ]
 
 [[package]]
 name = "solverforge-cvrp"
-version = "0.13.1"
+version = "0.14.1"
 dependencies = [
  "solverforge-solver",
 ]
 
 [[package]]
 name = "solverforge-macros"
-version = "0.13.1"
+version = "0.14.1"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -568,7 +568,7 @@ dependencies = [
 
 [[package]]
 name = "solverforge-scoring"
-version = "0.13.1"
+version = "0.14.1"
 dependencies = [
  "solverforge-core",
  "thiserror",
@@ -576,7 +576,7 @@ dependencies = [
 
 [[package]]
 name = "solverforge-solver"
-version = "0.13.1"
+version = "0.14.1"
 dependencies = [
  "rand",
  "rand_chacha",
diff --git a/list-variable/cvrp/src/cvrp_bench/solver/solverforge/Cargo.toml b/list-variable/cvrp/src/cvrp_bench/solver/solverforge/Cargo.toml
index 8324cb6..b4e1652 100644
--- a/list-variable/cvrp/src/cvrp_bench/solver/solverforge/Cargo.toml
+++ b/list-variable/cvrp/src/cvrp_bench/solver/solverforge/Cargo.toml
@@ -10,7 +10,7 @@ name = "solverforge_cvrp"
 crate-type = ["cdylib"]
 
 [dependencies]
-solverforge = { version = "0.13.1", path = "../../../../../../../solverforge-rs/crates/solverforge" }
+solverforge = { version = "0.14.1", path = "../../../../../../../solverforge/crates/solverforge" }
 pyo3 = { version = "0.28", features = ["extension-module"] }
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
diff --git a/list-variable/cvrp/src/cvrp_bench/solver/solverforge/src/domain.rs b/list-variable/cvrp/src/cvrp_bench/solver/solverforge/src/domain.rs
index 3338326..9ea18df 100644
--- a/list-variable/cvrp/src/cvrp_bench/solver/solverforge/src/domain.rs
+++ b/list-variable/cvrp/src/cvrp_bench/solver/solverforge/src/domain.rs
@@ -24,15 +24,12 @@ pub struct Route {
         solution_trait = "solverforge::cvrp::VrpSolution",
         distance_meter = "solverforge::cvrp::MatrixDistanceMeter",
         intra_distance_meter = "solverforge::cvrp::MatrixIntraDistanceMeter",
-        cw_depot_fn = "solverforge::cvrp::depot_for_cw",
-        cw_distance_fn = "solverforge::cvrp::distance",
-        cw_element_load_fn = "solverforge::cvrp::element_load",
-        cw_capacity_fn = "solverforge::cvrp::capacity",
-        cw_assign_route_fn = "solverforge::cvrp::replace_route",
-        k_opt_get_route = "solverforge::cvrp::get_route",
-        k_opt_set_route = "solverforge::cvrp::replace_route",
-        k_opt_depot_fn = "solverforge::cvrp::depot_for_entity",
-        k_opt_distance_fn = "solverforge::cvrp::distance"
+        route_get_fn = "solverforge::cvrp::get_route",
+        route_set_fn = "solverforge::cvrp::replace_route",
+        route_depot_fn = "solverforge::cvrp::depot_for_entity",
+        route_metric_class_fn = "solverforge::cvrp::route_metric_class",
+        route_distance_fn = "solverforge::cvrp::route_distance",
+        route_feasible_fn = "solverforge::cvrp::route_feasible"
     )]
     pub visits: Vec<usize>,
 

From e279b730559b707ebf60a5eb2e55a7cbeb228e8a Mon Sep 17 00:00:00 2001
From: Vittorio Distefano <info@vdistefano.studio>
Date: Thu, 21 May 2026 14:27:07 +0200
Subject: [PATCH 06/29] feat(employee-scheduling): share SolverForge constraint
 streams

Move the employee-scheduling SolverForge adapter to the 0.15.0 node-sharing compiler branch and replace the repeated macro-generated assigned-shift streams with shared named stream values inside #[solverforge_constraints]. The hard and soft constraint names and penalty functions stay intact, but the duplicate grouped nurse and shift-type presence definitions now flow through reusable stream variables that exercise the compiler's shared-node path.
---
 .../solver/solverforge_nrp/Cargo.lock         |  14 +-
 .../solver/solverforge_nrp/Cargo.toml         |   2 +-
 .../solver/solverforge_nrp/src/constraints.rs | 246 ++++++++----------
 3 files changed, 121 insertions(+), 141 deletions(-)

diff --git a/scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/solverforge_nrp/Cargo.lock b/scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/solverforge_nrp/Cargo.lock
index c762ffd..56aa3f6 100644
--- a/scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/solverforge_nrp/Cargo.lock
+++ b/scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/solverforge_nrp/Cargo.lock
@@ -558,7 +558,7 @@ dependencies = [
 
 [[package]]
 name = "solverforge"
-version = "0.13.1"
+version = "0.15.0"
 dependencies = [
  "solverforge-config",
  "solverforge-core",
@@ -571,7 +571,7 @@ dependencies = [
 
 [[package]]
 name = "solverforge-config"
-version = "0.13.1"
+version = "0.15.0"
 dependencies = [
  "serde",
  "serde_yaml",
@@ -582,7 +582,7 @@ dependencies = [
 
 [[package]]
 name = "solverforge-core"
-version = "0.13.1"
+version = "0.15.0"
 dependencies = [
  "serde",
  "thiserror",
@@ -590,14 +590,14 @@ dependencies = [
 
 [[package]]
 name = "solverforge-cvrp"
-version = "0.13.1"
+version = "0.15.0"
 dependencies = [
  "solverforge-solver",
 ]
 
 [[package]]
 name = "solverforge-macros"
-version = "0.13.1"
+version = "0.15.0"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -618,7 +618,7 @@ dependencies = [
 
 [[package]]
 name = "solverforge-scoring"
-version = "0.13.1"
+version = "0.15.0"
 dependencies = [
  "solverforge-core",
  "thiserror",
@@ -626,7 +626,7 @@ dependencies = [
 
 [[package]]
 name = "solverforge-solver"
-version = "0.13.1"
+version = "0.15.0"
 dependencies = [
  "rand 0.10.1",
  "rand_chacha 0.10.0",
diff --git a/scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/solverforge_nrp/Cargo.toml b/scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/solverforge_nrp/Cargo.toml
index 765654a..cafd9d9 100644
--- a/scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/solverforge_nrp/Cargo.toml
+++ b/scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/solverforge_nrp/Cargo.toml
@@ -10,7 +10,7 @@ name = "solverforge_nrp"
 crate-type = ["cdylib"]
 
 [dependencies]
-solverforge = { version = "0.13.1", path = "../../../../../../../solverforge-rs/crates/solverforge", features = ["serde"] }
+solverforge = { version = "0.15.0", path = "../../../../../../../solverforge-node-sharing/crates/solverforge", features = ["serde"] }
 tokio = { version = "1", features = ["sync", "rt", "time"] }
 rand = "0.9"
 pyo3 = { version = "0.28", features = ["extension-module"] }
diff --git a/scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/solverforge_nrp/src/constraints.rs b/scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/solverforge_nrp/src/constraints.rs
index 3985c88..d73ae3d 100644
--- a/scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/solverforge_nrp/src/constraints.rs
+++ b/scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/solverforge_nrp/src/constraints.rs
@@ -44,74 +44,7 @@ struct AssignedShiftType {
     global_day: i64,
 }
 
-macro_rules! assigned_nurse_shifts {
-    () => {
-        ConstraintFactory::<NrpPlan, HardSoftScore>::new()
-            .for_each(NrpPlan::shifts())
-            .filter(|shift: &NrpShift| shift.nurse_idx.is_some())
-            .join((
-                ConstraintFactory::<NrpPlan, HardSoftScore>::new()
-                    .for_each(NrpPlan::nurse_indices()),
-                joiner::equal_bi(
-                    |shift: &NrpShift| shift.nurse_idx,
-                    |nurse: &NurseIndex| Some(nurse.id),
-                ),
-            ))
-            .project(assigned_nurse_shift as fn(&NrpShift, &NurseIndex) -> AssignedNurseShift)
-    };
-}
-
-macro_rules! assigned_shift_types {
-    () => {
-        ConstraintFactory::<NrpPlan, HardSoftScore>::new()
-            .for_each(NrpPlan::shifts())
-            .filter(|shift: &NrpShift| shift.nurse_idx.is_some())
-            .join((
-                ConstraintFactory::<NrpPlan, HardSoftScore>::new()
-                    .for_each(NrpPlan::nurse_shift_type_indices()),
-                joiner::equal_bi(
-                    |shift: &NrpShift| shift.nurse_idx.map(|nurse| (nurse, shift.shift_type_idx)),
-                    |fact: &NurseShiftTypeIndex| Some((fact.nurse_idx, fact.shift_type_idx)),
-                ),
-            ))
-            .project(
-                assigned_shift_type as fn(&NrpShift, &NurseShiftTypeIndex) -> AssignedShiftType,
-            )
-    };
-}
-
-macro_rules! nurses_without_assignments {
-    () => {
-        ConstraintFactory::<NrpPlan, HardSoftScore>::new()
-            .for_each(NrpPlan::nurse_indices())
-            .if_not_exists((
-                ConstraintFactory::<NrpPlan, HardSoftScore>::new()
-                    .for_each(NrpPlan::shifts())
-                    .filter(|shift: &NrpShift| shift.nurse_idx.is_some()),
-                joiner::equal_bi(
-                    |nurse: &NurseIndex| Some(nurse.id),
-                    |shift: &NrpShift| shift.nurse_idx,
-                ),
-            ))
-    };
-}
-
-macro_rules! shift_types_without_assignments {
-    () => {
-        ConstraintFactory::<NrpPlan, HardSoftScore>::new()
-            .for_each(NrpPlan::nurse_shift_type_indices())
-            .if_not_exists((
-                ConstraintFactory::<NrpPlan, HardSoftScore>::new()
-                    .for_each(NrpPlan::shifts())
-                    .filter(|shift: &NrpShift| shift.nurse_idx.is_some()),
-                joiner::equal_bi(
-                    |fact: &NurseShiftTypeIndex| Some((fact.nurse_idx, fact.shift_type_idx)),
-                    |shift: &NrpShift| shift.nurse_idx.map(|nurse| (nurse, shift.shift_type_idx)),
-                ),
-            ))
-    };
-}
-
+#[solverforge_constraints]
 pub fn define_constraints() -> impl ConstraintSet<NrpPlan, HardSoftScore> {
     let minimum_coverage = ConstraintFactory::<NrpPlan, HardSoftScore>::new()
         .for_each(NrpPlan::shifts())
@@ -209,89 +142,112 @@ pub fn define_constraints() -> impl ConstraintSet<NrpPlan, HardSoftScore> {
         .penalize(HardSoftScore::of_hard(1))
         .named("adjacentForbiddenSuccession");
 
-    let total_assignment_bounds = assigned_nurse_shifts!()
+    let nurse_presence = ConstraintFactory::<NrpPlan, HardSoftScore>::new()
+        .for_each(NrpPlan::shifts())
+        .filter(|shift: &NrpShift| shift.nurse_idx.is_some())
+        .join((
+            ConstraintFactory::<NrpPlan, HardSoftScore>::new().for_each(NrpPlan::nurse_indices()),
+            joiner::equal_bi(
+                |shift: &NrpShift| shift.nurse_idx,
+                |nurse: &NurseIndex| Some(nurse.id),
+            ),
+        ))
+        .project(assigned_nurse_shift as fn(&NrpShift, &NurseIndex) -> AssignedNurseShift)
         .group_by(
             |row: &AssignedNurseShift| row.nurse_key,
             indexed_presence(|row: &AssignedNurseShift| row.global_day),
-        )
-        .penalize(|key: &NurseSoftKey, presence: &IndexedPresence| {
-            total_assignment_bounds_penalty(key, presence)
-        })
-        .named("totalAssignmentBounds");
-
-    let empty_total_assignment_bounds = nurses_without_assignments!()
+        );
+
+    let empty_total_assignment_bounds = ConstraintFactory::<NrpPlan, HardSoftScore>::new()
+        .for_each(NrpPlan::nurse_indices())
+        .if_not_exists((
+            ConstraintFactory::<NrpPlan, HardSoftScore>::new()
+                .for_each(NrpPlan::shifts())
+                .filter(|shift: &NrpShift| shift.nurse_idx.is_some()),
+            joiner::equal_bi(
+                |nurse: &NurseIndex| Some(nurse.id),
+                |shift: &NrpShift| shift.nurse_idx,
+            ),
+        ))
         .penalize(empty_total_assignment_bounds_penalty as fn(&NurseIndex) -> HardSoftScore)
         .named("totalAssignmentBounds");
 
-    let consecutive_work_bounds = assigned_nurse_shifts!()
-        .group_by(
-            |row: &AssignedNurseShift| row.nurse_key,
-            indexed_presence(|row: &AssignedNurseShift| row.global_day),
-        )
-        .penalize(|key: &NurseSoftKey, presence: &IndexedPresence| {
-            consecutive_work_bounds_penalty(key, presence)
-        })
-        .named("consecutiveWorkBounds");
-
-    let empty_consecutive_work_bounds = nurses_without_assignments!()
+    let empty_consecutive_work_bounds = ConstraintFactory::<NrpPlan, HardSoftScore>::new()
+        .for_each(NrpPlan::nurse_indices())
+        .if_not_exists((
+            ConstraintFactory::<NrpPlan, HardSoftScore>::new()
+                .for_each(NrpPlan::shifts())
+                .filter(|shift: &NrpShift| shift.nurse_idx.is_some()),
+            joiner::equal_bi(
+                |nurse: &NurseIndex| Some(nurse.id),
+                |shift: &NrpShift| shift.nurse_idx,
+            ),
+        ))
         .penalize(empty_consecutive_work_bounds_penalty as fn(&NurseIndex) -> HardSoftScore)
         .named("consecutiveWorkBounds");
 
-    let consecutive_off_bounds = assigned_nurse_shifts!()
-        .group_by(
-            |row: &AssignedNurseShift| row.nurse_key,
-            indexed_presence(|row: &AssignedNurseShift| row.global_day),
-        )
-        .penalize(|key: &NurseSoftKey, presence: &IndexedPresence| {
-            consecutive_off_bounds_penalty(key, presence)
-        })
-        .named("consecutiveOffBounds");
-
-    let empty_consecutive_off_bounds = nurses_without_assignments!()
+    let empty_consecutive_off_bounds = ConstraintFactory::<NrpPlan, HardSoftScore>::new()
+        .for_each(NrpPlan::nurse_indices())
+        .if_not_exists((
+            ConstraintFactory::<NrpPlan, HardSoftScore>::new()
+                .for_each(NrpPlan::shifts())
+                .filter(|shift: &NrpShift| shift.nurse_idx.is_some()),
+            joiner::equal_bi(
+                |nurse: &NurseIndex| Some(nurse.id),
+                |shift: &NrpShift| shift.nurse_idx,
+            ),
+        ))
         .penalize(empty_consecutive_off_bounds_penalty as fn(&NurseIndex) -> HardSoftScore)
         .named("consecutiveOffBounds");
 
-    let consecutive_shift_type_bounds = assigned_shift_types!()
+    let shift_type_presence = ConstraintFactory::<NrpPlan, HardSoftScore>::new()
+        .for_each(NrpPlan::shifts())
+        .filter(|shift: &NrpShift| shift.nurse_idx.is_some())
+        .join((
+            ConstraintFactory::<NrpPlan, HardSoftScore>::new()
+                .for_each(NrpPlan::nurse_shift_type_indices()),
+            joiner::equal_bi(
+                |shift: &NrpShift| shift.nurse_idx.map(|nurse| (nurse, shift.shift_type_idx)),
+                |fact: &NurseShiftTypeIndex| Some((fact.nurse_idx, fact.shift_type_idx)),
+            ),
+        ))
+        .project(assigned_shift_type as fn(&NrpShift, &NurseShiftTypeIndex) -> AssignedShiftType)
         .group_by(
             |row: &AssignedShiftType| row.key,
             indexed_presence(|row: &AssignedShiftType| row.global_day),
-        )
-        .penalize(|key: &ShiftTypeRunBoundsKey, presence: &IndexedPresence| {
-            consecutive_shift_type_bounds_penalty(key, presence)
-        })
-        .named("consecutiveShiftTypeBounds");
-
-    let empty_consecutive_shift_type_bounds = shift_types_without_assignments!()
+        );
+
+    let empty_consecutive_shift_type_bounds = ConstraintFactory::<NrpPlan, HardSoftScore>::new()
+        .for_each(NrpPlan::nurse_shift_type_indices())
+        .if_not_exists((
+            ConstraintFactory::<NrpPlan, HardSoftScore>::new()
+                .for_each(NrpPlan::shifts())
+                .filter(|shift: &NrpShift| shift.nurse_idx.is_some()),
+            joiner::equal_bi(
+                |fact: &NurseShiftTypeIndex| Some((fact.nurse_idx, fact.shift_type_idx)),
+                |shift: &NrpShift| shift.nurse_idx.map(|nurse| (nurse, shift.shift_type_idx)),
+            ),
+        ))
         .penalize(
             empty_consecutive_shift_type_bounds_penalty
                 as fn(&NurseShiftTypeIndex) -> HardSoftScore,
         )
         .named("consecutiveShiftTypeBounds");
 
-    let working_weekends = assigned_nurse_shifts!()
-        .group_by(
-            |row: &AssignedNurseShift| row.nurse_key,
-            indexed_presence(|row: &AssignedNurseShift| row.global_day),
-        )
-        .penalize(|key: &NurseSoftKey, presence: &IndexedPresence| {
-            working_weekends_penalty(key, presence)
-        })
-        .named("workingWeekends");
-
-    let empty_working_weekends = nurses_without_assignments!()
+    let empty_working_weekends = ConstraintFactory::<NrpPlan, HardSoftScore>::new()
+        .for_each(NrpPlan::nurse_indices())
+        .if_not_exists((
+            ConstraintFactory::<NrpPlan, HardSoftScore>::new()
+                .for_each(NrpPlan::shifts())
+                .filter(|shift: &NrpShift| shift.nurse_idx.is_some()),
+            joiner::equal_bi(
+                |nurse: &NurseIndex| Some(nurse.id),
+                |shift: &NrpShift| shift.nurse_idx,
+            ),
+        ))
         .penalize(empty_working_weekends_penalty as fn(&NurseIndex) -> HardSoftScore)
         .named("workingWeekends");
 
-    let complete_weekends = assigned_nurse_shifts!()
-        .group_by(
-            |row: &AssignedNurseShift| row.nurse_key,
-            indexed_presence(|row: &AssignedNurseShift| row.global_day),
-        )
-        .penalize(|key: &NurseSoftKey, presence: &IndexedPresence| {
-            complete_weekends_penalty(key, presence)
-        })
-        .named("completeWeekends");
-
     (
         minimum_coverage,
         optimal_coverage,
@@ -300,17 +256,41 @@ pub fn define_constraints() -> impl ConstraintSet<NrpPlan, HardSoftScore> {
         required_skill,
         initial_forbidden_succession,
         adjacent_forbidden_succession,
-        total_assignment_bounds,
+        nurse_presence
+            .penalize(|key: &NurseSoftKey, presence: &IndexedPresence| {
+                total_assignment_bounds_penalty(key, presence)
+            })
+            .named("totalAssignmentBounds"),
         empty_total_assignment_bounds,
-        consecutive_work_bounds,
+        nurse_presence
+            .penalize(|key: &NurseSoftKey, presence: &IndexedPresence| {
+                consecutive_work_bounds_penalty(key, presence)
+            })
+            .named("consecutiveWorkBounds"),
         empty_consecutive_work_bounds,
-        consecutive_off_bounds,
+        nurse_presence
+            .penalize(|key: &NurseSoftKey, presence: &IndexedPresence| {
+                consecutive_off_bounds_penalty(key, presence)
+            })
+            .named("consecutiveOffBounds"),
         empty_consecutive_off_bounds,
-        consecutive_shift_type_bounds,
+        shift_type_presence
+            .penalize(|key: &ShiftTypeRunBoundsKey, presence: &IndexedPresence| {
+                consecutive_shift_type_bounds_penalty(key, presence)
+            })
+            .named("consecutiveShiftTypeBounds"),
         empty_consecutive_shift_type_bounds,
-        working_weekends,
+        nurse_presence
+            .penalize(|key: &NurseSoftKey, presence: &IndexedPresence| {
+                working_weekends_penalty(key, presence)
+            })
+            .named("workingWeekends"),
         empty_working_weekends,
-        complete_weekends,
+        nurse_presence
+            .penalize(|key: &NurseSoftKey, presence: &IndexedPresence| {
+                complete_weekends_penalty(key, presence)
+            })
+            .named("completeWeekends"),
     )
 }
 

From f00fe10c2a5a426b977d3e49d8ad36c5b1a4b087 Mon Sep 17 00:00:00 2001
From: Vittorio Distefano <101409677+blackopsrepl@users.noreply.github.com>
Date: Sun, 17 May 2026 17:39:47 +0200
Subject: [PATCH 07/29] feat: add job-shop scheduling benchmark implementation

Implement a new job-shop-scheduling benchmark package with JSPLIB-style dataset loading, deterministic schedule validation, and a baseline solverforge adapter. Integrate it into the shared benchmark registry/CLI/config, add dataset manifest and sample instances, wire package discovery/PYTHONPATH, add Make targets, and update README + benchmark example configuration.
---
 Makefile                                      |  13 +-
 README.md                                     |   3 +
 benchmark.example.toml                        |   5 +
 docs_jssp_proposal.md                         | 185 ++++++++++++++++++
 pyproject.toml                                |   1 +
 .../job-shop-scheduling/data/jsplib/ft06.txt  |   7 +
 .../job-shop-scheduling/data/jsplib/la01.txt  |  11 ++
 .../job-shop-scheduling/data/jsplib/la02.txt  |  11 ++
 .../data/jsplib/manifest.json                 |  11 ++
 .../scripts/validate_all.py                   |  19 ++
 .../src/job_shop_bench/__init__.py            |   1 +
 .../src/job_shop_bench/domain/models.py       |  35 ++++
 .../src/job_shop_bench/loader.py              |  38 ++++
 .../src/job_shop_bench/solver/solver.py       |  34 ++++
 .../src/job_shop_bench/spec.py                |  65 ++++++
 .../src/job_shop_bench/validation.py          |  46 +++++
 scripts/run_benchmark.py                      |   1 +
 src/solverforge_bench/cli.py                  |   2 +
 src/solverforge_bench/config.py               |   1 +
 src/solverforge_bench/registry.py             |   4 +-
 20 files changed, 491 insertions(+), 2 deletions(-)
 create mode 100644 docs_jssp_proposal.md
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ft06.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/la01.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/la02.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/manifest.json
 create mode 100644 scalar-variable/job-shop-scheduling/scripts/validate_all.py
 create mode 100644 scalar-variable/job-shop-scheduling/src/job_shop_bench/__init__.py
 create mode 100644 scalar-variable/job-shop-scheduling/src/job_shop_bench/domain/models.py
 create mode 100644 scalar-variable/job-shop-scheduling/src/job_shop_bench/loader.py
 create mode 100644 scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solver.py
 create mode 100644 scalar-variable/job-shop-scheduling/src/job_shop_bench/spec.py
 create mode 100644 scalar-variable/job-shop-scheduling/src/job_shop_bench/validation.py

diff --git a/Makefile b/Makefile
index 5a18980..468ae25 100644
--- a/Makefile
+++ b/Makefile
@@ -32,7 +32,7 @@ NIGHTLY_ARGS ?=
 BENCH_CONFIG_ARG = $(if $(BENCH_CONFIG),--config "$(BENCH_CONFIG)",)
 NIGHTLY_CONFIG_ARG = $(if $(findstring --config,$(NIGHTLY_ARGS)),,$(if $(BENCH_CONFIG),--config "$(BENCH_CONFIG)",--config "benchmark.nightly.example.toml"))
 BENCH_DB_ARGS := --postgres-url "$(DATABASE_URL)"
-BENCH_PYTHONPATH := src:list-variable/cvrp/src:scalar-variable/employee-scheduling/src
+BENCH_PYTHONPATH := src:list-variable/cvrp/src:scalar-variable/employee-scheduling/src:scalar-variable/job-shop-scheduling/src
 BENCH_ENV := OMP_NUM_THREADS=1 MKL_NUM_THREADS=1 PYTHONPATH=$(BENCH_PYTHONPATH)
 BENCH_CPU ?= 0
 PINNED_BENCH := taskset -c $(BENCH_CPU) env $(BENCH_ENV)
@@ -48,6 +48,7 @@ EMPLOYEE_ROOT := scalar-variable/employee-scheduling
 EMPLOYEE_SOLVERFORGE_DIR := $(EMPLOYEE_ROOT)/src/employee_scheduling_bench/solver/solverforge_nrp
 EMPLOYEE_TIMEFOLD_POM := $(EMPLOYEE_ROOT)/src/employee_scheduling_bench/solver/timefold/pom.xml
 EMPLOYEE_ORTOOLS_DIR := $(EMPLOYEE_ROOT)/src/employee_scheduling_bench/solver/ortools
+JOBSHOP_ROOT := scalar-variable/job-shop-scheduling
 ORTOOLS_VERSION ?= 9.15.6755
 ORTOOLS_ARCHIVE ?= or-tools_amd64_opensuse-leap_cpp_v$(ORTOOLS_VERSION).tar.gz
 ORTOOLS_URL ?= https://github.com/google/or-tools/releases/download/v9.15/$(ORTOOLS_ARCHIVE)
@@ -229,3 +230,13 @@ normalize-results: banner
 	test -n "$(INPUT)"
 	test -n "$(OUTPUT)"
 	"$(PYTHON)" scripts/normalize_results.py --input "$(INPUT)" --output "$(OUTPUT)" $(ARGS)
+
+
+bench-job-shop-scheduling:
+	$(PINNED_BENCH) "$(PYTHON)" scripts/run_benchmark.py job-shop-scheduling $(BENCH_CONFIG_ARG) --dataset-set canonical --time-limits 1 10 60 $(BENCH_ARGS)
+
+bench-job-shop-scheduling-quick:
+	$(PINNED_BENCH) "$(PYTHON)" scripts/run_benchmark.py job-shop-scheduling $(BENCH_CONFIG_ARG) --run-kind quick --dataset-set quick --time-limits 1 10 $(BENCH_ARGS)
+
+validate-job-shop-scheduling: banner
+	cd $(JOBSHOP_ROOT) && PYTHONPATH=../../src:src "$(PYTHON)" scripts/validate_all.py
diff --git a/README.md b/README.md
index 5ca78ff..5bbd1cb 100644
--- a/README.md
+++ b/README.md
@@ -19,6 +19,9 @@ See `WIREFRAME.md` for the current as-built repository map.
 - `scalar-variable/employee-scheduling/` is the nurse rostering benchmark. It
   uses the bundled INRC-II TXT corpus and compares `solverforge`,
   `timefold`, and `ortools` on nurse-to-shift assignments.
+- `scalar-variable/job-shop-scheduling/` is the job-shop scheduling benchmark. It
+  uses bundled JSPLIB-style instances and currently exposes the `solverforge`
+  adapter through the shared harness.
 
 ## Documentation Map
 
diff --git a/benchmark.example.toml b/benchmark.example.toml
index fb8591c..7f38408 100644
--- a/benchmark.example.toml
+++ b/benchmark.example.toml
@@ -24,3 +24,8 @@ num_instances = 3
 [benchmarks.employee-scheduling]
 dataset_set = "quick"
 datasets = ["n005w4"]
+
+[benchmarks.job-shop-scheduling]
+dataset_set = "quick"
+datasets = ["ft06"]
+
diff --git a/docs_jssp_proposal.md b/docs_jssp_proposal.md
new file mode 100644
index 0000000..7b15ab8
--- /dev/null
+++ b/docs_jssp_proposal.md
@@ -0,0 +1,185 @@
+# Proposal: Add a Job-Shop Scheduling benchmark (JSSP)
+
+## Why this fills the benchmark gap
+
+Current benchmark surface:
+
+- CVRP (list-variable routing)
+- INRC2 nurse rostering (scalar-variable assignment/scheduling)
+
+Missing surface:
+
+- Machine scheduling with precedence + disjunctive machine capacity.
+
+A JSSP benchmark adds a third core optimization class while preserving the same shared harness shape already used in this repository: deterministic dataset loader, solver adapters, shared run matrix, shared timing/watchdog policy, shared CSV/postgres logging.
+
+## Dataset selection
+
+Use the public benchmark ecosystem around JSPLIB / OR-Library classic JSSP instances.
+
+Primary sources:
+
+- JSPLIB benchmark catalog: <https://scheduleopt.github.io/benchmarks/jsplib/>
+- OR-Library job-shop instances: <https://people.brunel.ac.uk/~mastjjb/jeb/orlib/jobshopinfo.html>
+
+Suggested bundled families:
+
+- Small/medium classics for quick runs: FT, LA, ORB, ABZ, YN
+- Larger stress set for candidate/nightly: TA (Taillard)
+
+## Repository layout
+
+Add a new problem package following the existing pattern:
+
+- `scalar-variable/job-shop-scheduling/`
+  - `src/job_shop_bench/__init__.py`
+  - `src/job_shop_bench/spec.py`
+  - `src/job_shop_bench/loader.py`
+  - `src/job_shop_bench/domain/models.py`
+  - `src/job_shop_bench/validation.py`
+  - `src/job_shop_bench/solver/solver.py` (adapter protocol)
+  - `src/job_shop_bench/solver/solverforge.py`
+  - `src/job_shop_bench/solver/ortools.py` (optional parity baseline)
+  - `data/jsplib/...` (instance files + manifest)
+  - `scripts/validate_all.py`
+  - `Makefile`
+
+The benchmark framework remains centralized in `src/solverforge_bench/`.
+
+## Data model and objective
+
+Use a canonical JSSP definition:
+
+- Jobs: ordered operation chains
+- Each operation: `(machine_id, duration)`
+- Hard constraints:
+  - Precedence within each job
+  - No overlap for operations sharing a machine
+- Objective: minimize makespan
+
+Recommended instance model:
+
+```python
+@dataclass(frozen=True)
+class Operation:
+    job_id: int
+    op_index: int
+    machine_id: int
+    duration: int
+
+@dataclass(frozen=True)
+class JobShopInstance:
+    name: str
+    num_jobs: int
+    num_machines: int
+    operations_by_job: tuple[tuple[Operation, ...], ...]
+    source_family: str
+```
+
+## Solver output contract
+
+Standardize solver return payload so validation is strict and comparable:
+
+- Per-operation start times (or equivalent machine sequences convertible to starts)
+- Optional solver-native metadata (`best_bound`, `search_nodes`, `status_text`)
+
+A validated schedule must produce:
+
+- `feasible = True/False`
+- `objective_value` = makespan when feasible
+- `violation` string when infeasible/invalid
+
+## Native result fields
+
+Add benchmark-native columns similar to existing adapters:
+
+- `num_jobs`
+- `num_machines`
+- `num_operations`
+- `source_family` (ft/la/orb/abz/yn/ta)
+- `known_best_makespan` (if available in manifest)
+- `makespan_gap_to_best` (if known best present)
+
+These should be produced by the adapter and passed to the shared framework row writer.
+
+## Manifests and run groups
+
+Create `data/jsplib/manifest.json` with deterministic groups:
+
+- `quick`: ~6 instances across multiple families (fast smoke)
+- `canonical`: balanced medium set
+- `stress`: larger TA-heavy set
+
+Example quick candidates:
+
+- `ft06`, `ft10`, `la16`, `orb04`, `abz6`, `ta20`
+
+## CLI and config integration
+
+Integrate with root harness without changing shared policy:
+
+- Add benchmark id: `job-shop-scheduling`
+- Add benchmark-specific selector options in the adapter layer only:
+  - `--dataset-set`
+  - `--datasets`
+
+Update `benchmark.example.toml`:
+
+```toml
+benchmark = "job-shop-scheduling"
+
+[benchmarks.job-shop-scheduling]
+dataset_set = "quick"
+datasets = ["ft06", "la16"]
+```
+
+## Make targets
+
+Add root targets mirroring existing conventions:
+
+- `make validate-job-shop-scheduling`
+- `make bench-job-shop-scheduling-quick`
+- `make bench-job-shop-scheduling`
+- `make bench-job-shop-scheduling-quick-db`
+
+## Validation logic
+
+`validation.py` should verify:
+
+1. Every operation appears exactly once.
+2. Start times are non-negative.
+3. Job precedence respected.
+4. Machine disjunctive constraints respected.
+5. Makespan computed from operation end times.
+
+Return deterministic error messages so solver failures are distinguishable from loader/adapter bugs.
+
+## Implementation phases
+
+1. **Phase 1: skeleton + parser + validator**
+   - Loader for selected JSPLIB format
+   - Strict validation + makespan evaluation
+   - One solver adapter (SolverForge)
+2. **Phase 2: harness registration + TOML/CLI plumbing**
+   - Add benchmark spec to registry
+   - Add quick/canonical groups and make targets
+3. **Phase 3: baseline parity + reporting polish**
+   - Optional OR-Tools baseline adapter
+   - Known-best manifest enrichment
+   - Gap metrics in summaries
+
+## Smoke-test commands
+
+- `make validate-job-shop-scheduling`
+- `make bench-job-shop-scheduling-quick`
+- `PYTHONPATH=src:list-variable/cvrp/src:scalar-variable/employee-scheduling/src:scalar-variable/job-shop-scheduling/src .venv/bin/python3 scripts/run_benchmark.py job-shop-scheduling --run-kind quick --datasets ft06 la16 --time-limits 1 10`
+
+## Risks and mitigations
+
+- **Instance format variance**: keep loader format-specific and normalize to one in-memory model.
+- **Objective comparability**: make makespan the only scored objective for now.
+- **Solver-output shape differences**: adapt all solver outputs into one canonical schedule payload before validation.
+
+## Recommendation
+
+Proceed with JSSP as the third benchmark family. It is problem-class specific, publicly benchmarked, scalable from quick to nightly, and fits the same shared harness architecture already used by this repository.
diff --git a/pyproject.toml b/pyproject.toml
index e714604..18db799 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -18,4 +18,5 @@ where = [
     "src",
     "list-variable/cvrp/src",
     "scalar-variable/employee-scheduling/src",
+    "scalar-variable/job-shop-scheduling/src",
 ]
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/ft06.txt b/scalar-variable/job-shop-scheduling/data/jsplib/ft06.txt
new file mode 100644
index 0000000..b2169b2
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/ft06.txt
@@ -0,0 +1,7 @@
+6 6
+2 1 0 3 1 6 3 7 5 3 4 6
+1 8 2 5 4 10 5 10 0 10 3 4
+2 5 3 4 5 8 0 9 1 1 4 7
+1 5 0 5 2 5 3 3 4 8 5 9
+2 9 1 3 4 5 5 4 0 3 3 1
+1 3 3 3 5 9 0 10 4 4 2 1
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/la01.txt b/scalar-variable/job-shop-scheduling/data/jsplib/la01.txt
new file mode 100644
index 0000000..4531d81
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/la01.txt
@@ -0,0 +1,11 @@
+10 5
+1 21 0 53 4 95 3 55 2 34
+0 21 3 52 4 16 2 26 1 71
+3 39 4 98 1 42 2 31 0 12
+1 77 0 55 4 79 2 66 3 77
+0 83 3 34 2 64 1 19 4 37
+1 54 2 43 4 79 0 92 3 62
+3 69 4 77 1 87 2 87 0 93
+2 38 0 60 1 41 3 24 4 83
+3 17 1 49 4 25 0 44 2 98
+4 77 3 79 2 43 1 75 0 96
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/la02.txt b/scalar-variable/job-shop-scheduling/data/jsplib/la02.txt
new file mode 100644
index 0000000..4574595
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/la02.txt
@@ -0,0 +1,11 @@
+10 5
+0 20 3 87 4 31 2 76 1 17
+4 25 2 32 0 24 1 18 3 81
+3 72 1 23 2 28 0 60 4 40
+1 15 0 35 3 76 2 31 4 13
+0 28 1 59 4 89 2 58 3 11
+2 45 4 24 1 41 3 34 0 94
+1 93 2 29 3 77 0 79 4 62
+4 32 0 54 3 31 1 55 2 13
+2 30 4 89 0 7 3 13 1 66
+1 38 3 21 0 54 2 72 4 95
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/manifest.json b/scalar-variable/job-shop-scheduling/data/jsplib/manifest.json
new file mode 100644
index 0000000..f166e6e
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/manifest.json
@@ -0,0 +1,11 @@
+{
+  "groups": {
+    "quick": ["ft06", "la01"],
+    "canonical": ["ft06", "la01", "la02"]
+  },
+  "instances": [
+    {"name": "ft06", "family": "ft", "path": "ft06.txt", "known_best_makespan": 55},
+    {"name": "la01", "family": "la", "path": "la01.txt", "known_best_makespan": 666},
+    {"name": "la02", "family": "la", "path": "la02.txt", "known_best_makespan": 655}
+  ]
+}
diff --git a/scalar-variable/job-shop-scheduling/scripts/validate_all.py b/scalar-variable/job-shop-scheduling/scripts/validate_all.py
new file mode 100644
index 0000000..7fc3b47
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/scripts/validate_all.py
@@ -0,0 +1,19 @@
+from __future__ import annotations
+
+from pathlib import Path
+
+from job_shop_bench.loader import instance_metadata, load_instance
+
+
+def main() -> None:
+    data_dir = Path(__file__).resolve().parents[1] / "data" / "jsplib"
+    meta = instance_metadata(data_dir)
+    for name, item in sorted(meta.items()):
+        inst = load_instance(data_dir / item["path"], name=name, family=item["family"])
+        assert inst.num_jobs > 0 and inst.num_machines > 0
+        assert all(len(job) == inst.num_machines for job in inst.operations_by_job)
+    print(f"validated {len(meta)} instances")
+
+
+if __name__ == "__main__":
+    main()
diff --git a/scalar-variable/job-shop-scheduling/src/job_shop_bench/__init__.py b/scalar-variable/job-shop-scheduling/src/job_shop_bench/__init__.py
new file mode 100644
index 0000000..34e37de
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/src/job_shop_bench/__init__.py
@@ -0,0 +1 @@
+"""Job-shop scheduling benchmark package."""
diff --git a/scalar-variable/job-shop-scheduling/src/job_shop_bench/domain/models.py b/scalar-variable/job-shop-scheduling/src/job_shop_bench/domain/models.py
new file mode 100644
index 0000000..b845c53
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/src/job_shop_bench/domain/models.py
@@ -0,0 +1,35 @@
+from __future__ import annotations
+
+from dataclasses import dataclass
+
+
+@dataclass(frozen=True)
+class Operation:
+    job_id: int
+    op_index: int
+    machine_id: int
+    duration: int
+
+
+@dataclass(frozen=True)
+class JobShopInstance:
+    name: str
+    family: str
+    num_jobs: int
+    num_machines: int
+    operations_by_job: tuple[tuple[Operation, ...], ...]
+
+
+@dataclass(frozen=True)
+class ScheduledOperation:
+    job_id: int
+    op_index: int
+    machine_id: int
+    start: int
+    duration: int
+
+
+@dataclass(frozen=True)
+class Solution:
+    operations: tuple[ScheduledOperation, ...]
+    reported_makespan: int | None = None
diff --git a/scalar-variable/job-shop-scheduling/src/job_shop_bench/loader.py b/scalar-variable/job-shop-scheduling/src/job_shop_bench/loader.py
new file mode 100644
index 0000000..c38b10c
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/src/job_shop_bench/loader.py
@@ -0,0 +1,38 @@
+from __future__ import annotations
+
+import json
+from pathlib import Path
+
+from job_shop_bench.domain.models import JobShopInstance, Operation
+
+
+def load_manifest(data_dir: Path) -> dict:
+    return json.loads((data_dir / "manifest.json").read_text(encoding="utf-8"))
+
+
+def dataset_group_names(data_dir: Path, group: str) -> set[str]:
+    manifest = load_manifest(data_dir)
+    groups = manifest.get("groups", {})
+    if group not in groups:
+        raise ValueError(f"Unknown dataset set '{group}'. Available: {', '.join(sorted(groups))}")
+    return set(groups[group])
+
+
+def instance_metadata(data_dir: Path) -> dict[str, dict]:
+    manifest = load_manifest(data_dir)
+    return {item["name"]: item for item in manifest.get("instances", [])}
+
+
+def load_instance(path: Path, *, name: str, family: str) -> JobShopInstance:
+    lines = [ln.strip() for ln in path.read_text(encoding="utf-8").splitlines() if ln.strip() and not ln.strip().startswith("#")]
+    num_jobs, num_machines = [int(x) for x in lines[0].split()[:2]]
+    ops_by_job: list[tuple[Operation, ...]] = []
+    for job_id, row in enumerate(lines[1:1 + num_jobs]):
+        vals = [int(x) for x in row.split()]
+        ops = []
+        for op_index in range(0, len(vals), 2):
+            machine_id = vals[op_index]
+            duration = vals[op_index + 1]
+            ops.append(Operation(job_id=job_id, op_index=op_index // 2, machine_id=machine_id, duration=duration))
+        ops_by_job.append(tuple(ops))
+    return JobShopInstance(name=name, family=family, num_jobs=num_jobs, num_machines=num_machines, operations_by_job=tuple(ops_by_job))
diff --git a/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solver.py b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solver.py
new file mode 100644
index 0000000..e8cf4ba
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solver.py
@@ -0,0 +1,34 @@
+from __future__ import annotations
+
+from typing import Callable
+
+from job_shop_bench.domain.models import JobShopInstance, ScheduledOperation, Solution
+from solverforge_bench.model import SolverVersion
+
+AVAILABLE_METHODS = ["solverforge"]
+
+
+def create_solver(method: str, time_limit: int) -> Callable[[JobShopInstance, int], Solution]:
+    if method != "solverforge":
+        raise ValueError(f"Unknown solver: {method}")
+
+    def solve(instance: JobShopInstance, _time_limit: int) -> Solution:
+        # Deterministic earliest-start dispatch baseline.
+        machine_ready = [0] * instance.num_machines
+        job_ready = [0] * instance.num_jobs
+        out: list[ScheduledOperation] = []
+        for job in instance.operations_by_job:
+            for op in job:
+                start = max(job_ready[op.job_id], machine_ready[op.machine_id])
+                out.append(ScheduledOperation(job_id=op.job_id, op_index=op.op_index, machine_id=op.machine_id, start=start, duration=op.duration))
+                finish = start + op.duration
+                job_ready[op.job_id] = finish
+                machine_ready[op.machine_id] = finish
+        makespan = max(job_ready) if job_ready else 0
+        return Solution(operations=tuple(out), reported_makespan=makespan)
+
+    return solve
+
+
+def solver_versions(solvers: list[str]) -> dict[str, SolverVersion]:
+    return {s: SolverVersion(solver=s, version="baseline-dispatch", source="benchmark") for s in solvers}
diff --git a/scalar-variable/job-shop-scheduling/src/job_shop_bench/spec.py b/scalar-variable/job-shop-scheduling/src/job_shop_bench/spec.py
new file mode 100644
index 0000000..aa1bcfe
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/src/job_shop_bench/spec.py
@@ -0,0 +1,65 @@
+from __future__ import annotations
+
+import argparse
+from pathlib import Path
+from typing import Iterable
+
+from job_shop_bench.domain.models import Solution
+from job_shop_bench.loader import dataset_group_names, instance_metadata, load_instance
+from job_shop_bench.solver.solver import AVAILABLE_METHODS, create_solver, solver_versions
+from job_shop_bench.validation import ValidationError, validate
+from solverforge_bench.model import BenchmarkCase, Evaluation, SolverRun, SolverVersion
+
+
+class JobShopSpec:
+    name = "job-shop-scheduling"
+    category = "scalar_variable"
+    default_time_limits = [1, 10, 60]
+    available_solvers = AVAILABLE_METHODS
+    default_solvers = AVAILABLE_METHODS
+    native_columns = ["num_jobs", "num_machines", "num_operations", "source_family", "known_best_makespan", "makespan_gap_to_best"]
+    solution_model = Solution
+
+    def configure_parser(self, parser: argparse.ArgumentParser) -> None:
+        parser.add_argument("--dataset-set", default=None)
+        parser.add_argument("--datasets", nargs="+", default=None)
+
+    def cases(self, args: argparse.Namespace) -> Iterable[BenchmarkCase]:
+        data_dir = Path(args.benchmark_root) / "data" / "jsplib"
+        meta = instance_metadata(data_dir)
+        selected = list(meta)
+        if args.dataset_set:
+            allowed = dataset_group_names(data_dir, args.dataset_set)
+            selected = [n for n in selected if n in allowed]
+        if args.datasets:
+            wanted = set(args.datasets)
+            selected = [n for n in selected if n in wanted]
+        dataset_set = args.dataset_set or ("custom" if args.datasets else "all")
+        for name in selected:
+            m = meta[name]
+            instance = load_instance(data_dir / m["path"], name=name, family=m["family"])
+            yield BenchmarkCase(dataset="JSPLIB", dataset_set=dataset_set, instance=name, instance_size=instance.num_jobs * instance.num_machines, payload=instance, native_fields={"num_jobs": instance.num_jobs, "num_machines": instance.num_machines, "num_operations": sum(len(j) for j in instance.operations_by_job), "source_family": instance.family, "known_best_makespan": m.get("known_best_makespan")})
+
+    def create_solver(self, method: str, *, time_limit: int = 60):
+        return create_solver(method=method, time_limit=time_limit)
+
+    def solver_versions(self, solvers: Iterable[str]) -> dict[str, SolverVersion]:
+        return solver_versions(list(solvers))
+
+    def evaluate(self, *, case: BenchmarkCase, run: SolverRun, artifact_dir: Path) -> Evaluation:
+        try:
+            makespan = validate(case.payload, run.solution)
+        except ValidationError as exc:
+            return Evaluation(hard_feasible=False, validation_error=str(exc))
+        best = case.native_fields.get("known_best_makespan")
+        gap = ((makespan - best) / best) if best else None
+        return Evaluation(hard_feasible=True, cost=makespan, reported_cost=getattr(run.solution, "reported_makespan", None), validation_error="", native_fields={"makespan_gap_to_best": gap})
+
+    def output_path(self, args: argparse.Namespace, run_stamp: str) -> Path:
+        return Path(args.benchmark_root) / "data" / f"benchmark_job_shop_scheduling_{run_stamp}.csv"
+
+    def artifact_dir(self, args: argparse.Namespace, run_stamp: str) -> Path:
+        return Path(args.benchmark_root) / "data" / "artifacts" / f"job_shop_scheduling_{run_stamp}"
+
+
+SPEC = JobShopSpec()
diff --git a/scalar-variable/job-shop-scheduling/src/job_shop_bench/validation.py b/scalar-variable/job-shop-scheduling/src/job_shop_bench/validation.py
new file mode 100644
index 0000000..9984133
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/src/job_shop_bench/validation.py
@@ -0,0 +1,46 @@
+from __future__ import annotations
+
+from job_shop_bench.domain.models import JobShopInstance, Solution
+
+
+class ValidationError(ValueError):
+    pass
+
+
+def validate(instance: JobShopInstance, solution: Solution) -> int:
+    entries = {(op.job_id, op.op_index): op for job in instance.operations_by_job for op in job}
+    seen = set()
+    machine_windows: dict[int, list[tuple[int, int, tuple[int, int]]]] = {}
+    starts: dict[tuple[int, int], int] = {}
+
+    for sop in solution.operations:
+        key = (sop.job_id, sop.op_index)
+        if key not in entries:
+            raise ValidationError(f"Unknown operation {key}")
+        if key in seen:
+            raise ValidationError(f"Duplicate operation {key}")
+        if sop.start < 0:
+            raise ValidationError(f"Negative start for {key}")
+        src = entries[key]
+        if sop.machine_id != src.machine_id or sop.duration != src.duration:
+            raise ValidationError(f"Mismatched machine/duration for {key}")
+        seen.add(key)
+        starts[key] = sop.start
+        machine_windows.setdefault(sop.machine_id, []).append((sop.start, sop.start + sop.duration, key))
+
+    if seen != set(entries):
+        missing = sorted(set(entries) - seen)
+        raise ValidationError(f"Missing operations: {missing[:5]}")
+
+    for job in instance.operations_by_job:
+        for prev, cur in zip(job, job[1:]):
+            if starts[(cur.job_id, cur.op_index)] < starts[(prev.job_id, prev.op_index)] + prev.duration:
+                raise ValidationError(f"Precedence violation on job {cur.job_id}")
+
+    for machine, windows in machine_windows.items():
+        windows.sort(key=lambda x: x[0])
+        for (_, end_a, key_a), (start_b, _, key_b) in zip(windows, windows[1:]):
+            if start_b < end_a:
+                raise ValidationError(f"Machine overlap on {machine}: {key_a} and {key_b}")
+
+    return max(starts[(op.job_id, op.op_index)] + op.duration for job in instance.operations_by_job for op in job)
diff --git a/scripts/run_benchmark.py b/scripts/run_benchmark.py
index 8306095..e9149c2 100755
--- a/scripts/run_benchmark.py
+++ b/scripts/run_benchmark.py
@@ -15,6 +15,7 @@
     str(REPO_ROOT / "src"),
     str(REPO_ROOT / "list-variable" / "cvrp" / "src"),
     str(REPO_ROOT / "scalar-variable" / "employee-scheduling" / "src"),
+    str(REPO_ROOT / "scalar-variable" / "job-shop-scheduling" / "src"),
 ]
 
 from solverforge_bench.cli import main  # noqa: E402
diff --git a/src/solverforge_bench/cli.py b/src/solverforge_bench/cli.py
index 24423ca..ef65845 100644
--- a/src/solverforge_bench/cli.py
+++ b/src/solverforge_bench/cli.py
@@ -212,6 +212,8 @@ def _benchmark_root(repo_root: Path, benchmark_name: str) -> Path:
         return repo_root / "list-variable" / "cvrp"
     if benchmark_name == "employee-scheduling":
         return repo_root / "scalar-variable" / "employee-scheduling"
+    if benchmark_name == "job-shop-scheduling":
+        return repo_root / "scalar-variable" / "job-shop-scheduling"
     raise ValueError(f"Unknown benchmark: {benchmark_name}")
 
 
diff --git a/src/solverforge_bench/config.py b/src/solverforge_bench/config.py
index a0efbfc..89ac2e1 100644
--- a/src/solverforge_bench/config.py
+++ b/src/solverforge_bench/config.py
@@ -44,6 +44,7 @@ class BenchmarkConfig:
 BENCHMARK_KEYS = {
     "cvrp": {"num_instances"},
     "employee-scheduling": {"dataset_set", "datasets"},
+    "job-shop-scheduling": {"dataset_set", "datasets"},
 }
 RUN_KIND_CHOICES = ("quick", "candidate", "tag")
 
diff --git a/src/solverforge_bench/registry.py b/src/solverforge_bench/registry.py
index 5ebb818..16fe4a9 100644
--- a/src/solverforge_bench/registry.py
+++ b/src/solverforge_bench/registry.py
@@ -8,13 +8,15 @@
 def get_specs() -> dict[str, BenchmarkSpec]:
     from cvrp_bench.spec import SPEC as cvrp
     from employee_scheduling_bench.spec import SPEC as employee_scheduling
+    from job_shop_bench.spec import SPEC as job_shop
 
     return {
         "cvrp": cvrp,
         "employee-scheduling": employee_scheduling,
+        "job-shop-scheduling": job_shop,
     }
 
 
 def canonical_specs() -> list[BenchmarkSpec]:
     specs = get_specs()
-    return [specs["cvrp"], specs["employee-scheduling"]]
+    return [specs["cvrp"], specs["employee-scheduling"], specs["job-shop-scheduling"]]

From 348e71e3b5527ef75ccc1bd95de146e33e364ad0 Mon Sep 17 00:00:00 2001
From: Vittorio Distefano <info@vdistefano.studio>
Date: Sun, 17 May 2026 19:25:47 +0200
Subject: [PATCH 08/29] fix(job-shop): serialize schedule payloads across
 harness

Convert the job-shop scheduling returned schedule models from dataclasses to Pydantic models so the shared subprocess execution boundary can call model_dump(mode="json") consistently.

This fixes the quick benchmark failure where JSSP solvers produced valid in-process schedules but the shared harness recorded AttributeError before validation could run.
---
 .../src/job_shop_bench/domain/models.py                   | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/scalar-variable/job-shop-scheduling/src/job_shop_bench/domain/models.py b/scalar-variable/job-shop-scheduling/src/job_shop_bench/domain/models.py
index b845c53..70155dd 100644
--- a/scalar-variable/job-shop-scheduling/src/job_shop_bench/domain/models.py
+++ b/scalar-variable/job-shop-scheduling/src/job_shop_bench/domain/models.py
@@ -2,6 +2,8 @@
 
 from dataclasses import dataclass
 
+from pydantic import BaseModel
+
 
 @dataclass(frozen=True)
 class Operation:
@@ -20,8 +22,7 @@ class JobShopInstance:
     operations_by_job: tuple[tuple[Operation, ...], ...]
 
 
-@dataclass(frozen=True)
-class ScheduledOperation:
+class ScheduledOperation(BaseModel):
     job_id: int
     op_index: int
     machine_id: int
@@ -29,7 +30,6 @@ class ScheduledOperation:
     duration: int
 
 
-@dataclass(frozen=True)
-class Solution:
+class Solution(BaseModel):
     operations: tuple[ScheduledOperation, ...]
     reported_makespan: int | None = None

From 17a5537247c4c1e79dc8e112d6527b44ed381179 Mon Sep 17 00:00:00 2001
From: Vittorio Distefano <info@vdistefano.studio>
Date: Sun, 17 May 2026 19:27:06 +0200
Subject: [PATCH 09/29] feat(job-shop): add three production solver adapters

Replace the dispatch-only scaffold with registered SolverForge, Timefold, and OR-Tools adapters for JSPLIB job-shop scheduling.

The SolverForge adapter is a Rust/PyO3 planning model, Timefold is packaged as a Java fat JAR, and OR-Tools is a native C++ CP-SAT executable. All adapters exchange the same JSON instance shape and return strict per-operation start schedules for the shared Python validator.

The SolverForge model scores makespan directly and errors on unassigned starts instead of fabricating a zero start, so the benchmark reports the same objective it asks the solver to optimize.
---
 .../job_shop_bench/solver/instance_json.py    |  27 +
 .../solver/ortools/CMakeLists.txt             |  27 +
 .../job_shop_bench/solver/ortools/__init__.py |  51 +
 .../src/job_shop_bench/solver/ortools/main.cc | 200 ++++
 .../src/job_shop_bench/solver/solver.py       |  61 +-
 .../src/job_shop_bench/solver/solverforge.py  |  42 +
 .../solver/solverforge_jssp/Cargo.lock        | 944 ++++++++++++++++++
 .../solver/solverforge_jssp/Cargo.toml        |  20 +
 .../solver/solverforge_jssp/pyproject.toml    |  11 +
 .../solver/solverforge_jssp/solver.toml       |   8 +
 .../solverforge_jssp/src/constraints.rs       | 140 +++
 .../solver/solverforge_jssp/src/domain.rs     |  61 ++
 .../solver/solverforge_jssp/src/lib.rs        | 178 ++++
 .../src/job_shop_bench/solver/timefold.py     |  45 +
 .../job_shop_bench/solver/timefold/pom.xml    |  75 ++
 .../jssp/JsspConstraintProvider.java          |  70 ++
 .../java/com/solverforgebench/jssp/Main.java  | 138 +++
 .../jssp/domain/JsspSchedule.java             |  48 +
 .../jssp/domain/OperationAssignment.java      |  67 ++
 .../main/resources/simplelogger.properties    |   2 +
 20 files changed, 2194 insertions(+), 21 deletions(-)
 create mode 100644 scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/instance_json.py
 create mode 100644 scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/ortools/CMakeLists.txt
 create mode 100644 scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/ortools/__init__.py
 create mode 100644 scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/ortools/main.cc
 create mode 100644 scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge.py
 create mode 100644 scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp/Cargo.lock
 create mode 100644 scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp/Cargo.toml
 create mode 100644 scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp/pyproject.toml
 create mode 100644 scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp/solver.toml
 create mode 100644 scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp/src/constraints.rs
 create mode 100644 scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp/src/domain.rs
 create mode 100644 scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp/src/lib.rs
 create mode 100644 scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold.py
 create mode 100644 scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold/pom.xml
 create mode 100644 scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold/src/main/java/com/solverforgebench/jssp/JsspConstraintProvider.java
 create mode 100644 scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold/src/main/java/com/solverforgebench/jssp/Main.java
 create mode 100644 scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold/src/main/java/com/solverforgebench/jssp/domain/JsspSchedule.java
 create mode 100644 scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold/src/main/java/com/solverforgebench/jssp/domain/OperationAssignment.java
 create mode 100644 scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold/src/main/resources/simplelogger.properties

diff --git a/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/instance_json.py b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/instance_json.py
new file mode 100644
index 0000000..b871f55
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/instance_json.py
@@ -0,0 +1,27 @@
+from __future__ import annotations
+
+import json
+
+from job_shop_bench.domain.models import JobShopInstance
+
+
+def serialize_instance(instance: JobShopInstance) -> str:
+    operations = [
+        {
+            "job_id": op.job_id,
+            "op_index": op.op_index,
+            "machine_id": op.machine_id,
+            "duration": op.duration,
+        }
+        for job in instance.operations_by_job
+        for op in job
+    ]
+    return json.dumps(
+        {
+            "name": instance.name,
+            "family": instance.family,
+            "num_jobs": instance.num_jobs,
+            "num_machines": instance.num_machines,
+            "operations": operations,
+        }
+    )
diff --git a/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/ortools/CMakeLists.txt b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/ortools/CMakeLists.txt
new file mode 100644
index 0000000..ce44d07
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/ortools/CMakeLists.txt
@@ -0,0 +1,27 @@
+cmake_minimum_required(VERSION 3.18)
+
+if(POLICY CMP0144)
+  cmake_policy(SET CMP0144 NEW)
+endif()
+
+project(job_shop_scheduling_ortools VERSION 1.0 LANGUAGES CXX)
+
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+set(CMAKE_CXX_EXTENSIONS OFF)
+
+if(NOT CMAKE_BUILD_TYPE)
+  set(CMAKE_BUILD_TYPE Release CACHE STRING "Build type" FORCE)
+endif()
+
+find_package(ortools REQUIRED CONFIG)
+
+add_executable(job_shop_scheduling_ortools main.cc)
+target_link_libraries(job_shop_scheduling_ortools PRIVATE ortools::ortools)
+
+if(ORTOOLS_ROOT)
+  set_target_properties(
+    job_shop_scheduling_ortools
+    PROPERTIES BUILD_RPATH "${ORTOOLS_ROOT}/lib64"
+  )
+endif()
diff --git a/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/ortools/__init__.py b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/ortools/__init__.py
new file mode 100644
index 0000000..6d565d5
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/ortools/__init__.py
@@ -0,0 +1,51 @@
+from __future__ import annotations
+
+import json
+import subprocess
+import sys
+from pathlib import Path
+
+from job_shop_bench.domain.models import (
+    JobShopInstance,
+    ScheduledOperation,
+    Solution,
+)
+from job_shop_bench.solver.instance_json import serialize_instance
+
+_BINARY_PATH = Path(__file__).parent / "target" / "job_shop_scheduling_ortools"
+
+
+def solve_with_ortools(instance: JobShopInstance, time_limit: int) -> Solution:
+    if not _BINARY_PATH.exists():
+        raise RuntimeError(
+            "native OR-Tools solver is not built; run "
+            "`make build-job-shop-scheduling-ortools`"
+        )
+
+    result = subprocess.run(
+        [str(_BINARY_PATH), str(time_limit)],
+        input=serialize_instance(instance).encode(),
+        capture_output=True,
+    )
+    stderr = result.stderr.decode()
+    if result.returncode != 0:
+        raise RuntimeError(
+            f"native OR-Tools solver failed (exit {result.returncode}):\n{stderr}"
+        )
+    if stderr:
+        print(stderr, file=sys.stderr, end="")
+
+    output = json.loads(result.stdout)
+    return Solution(
+        operations=[
+            ScheduledOperation(
+                job_id=op["job_id"],
+                op_index=op["op_index"],
+                machine_id=op["machine_id"],
+                start=op["start"],
+                duration=op["duration"],
+            )
+            for op in output["operations"]
+        ],
+        reported_makespan=output["reported_makespan"],
+    )
diff --git a/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/ortools/main.cc b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/ortools/main.cc
new file mode 100644
index 0000000..515106a
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/ortools/main.cc
@@ -0,0 +1,200 @@
+#include <algorithm>
+#include <cstdlib>
+#include <exception>
+#include <iostream>
+#include <iterator>
+#include <map>
+#include <numeric>
+#include <sstream>
+#include <stdexcept>
+#include <string>
+#include <utility>
+#include <vector>
+
+#include "absl/base/log_severity.h"
+#include "absl/log/globals.h"
+#include "boost/json.hpp"
+#include "boost/json/src.hpp"
+#include "ortools/base/init_google.h"
+#include "ortools/base/version.h"
+#include "ortools/sat/cp_model.h"
+#include "ortools/sat/cp_model.pb.h"
+#include "ortools/sat/cp_model_solver.h"
+#include "ortools/sat/model.h"
+#include "ortools/sat/sat_parameters.pb.h"
+
+namespace json = boost::json;
+namespace sat = operations_research::sat;
+
+namespace {
+
+struct Operation {
+  int job_id;
+  int op_index;
+  int machine_id;
+  int duration;
+};
+
+struct OperationVars {
+  sat::IntVar start;
+  sat::IntVar end;
+  sat::IntervalVar interval;
+};
+
+struct InstancePayload {
+  int num_jobs;
+  int num_machines;
+  std::vector<Operation> operations;
+};
+
+int AsInt(const json::value& value) {
+  if (value.is_int64()) {
+    return static_cast<int>(value.as_int64());
+  }
+  if (value.is_uint64()) {
+    return static_cast<int>(value.as_uint64());
+  }
+  throw std::runtime_error("expected integer JSON value");
+}
+
+const json::array& ArrayAt(const json::object& object, const char* key) {
+  return object.at(key).as_array();
+}
+
+InstancePayload ParsePayload(const std::string& input) {
+  const json::object root = json::parse(input).as_object();
+  InstancePayload payload;
+  payload.num_jobs = AsInt(root.at("num_jobs"));
+  payload.num_machines = AsInt(root.at("num_machines"));
+  for (const json::value& value : ArrayAt(root, "operations")) {
+    const json::object op = value.as_object();
+    payload.operations.push_back(Operation{
+        .job_id = AsInt(op.at("job_id")),
+        .op_index = AsInt(op.at("op_index")),
+        .machine_id = AsInt(op.at("machine_id")),
+        .duration = AsInt(op.at("duration")),
+    });
+  }
+  return payload;
+}
+
+std::string OpName(const Operation& op) {
+  return "j" + std::to_string(op.job_id) + "_o" + std::to_string(op.op_index);
+}
+
+json::object Solve(const InstancePayload& payload, double time_limit) {
+  const int horizon = std::max(
+      1, std::accumulate(payload.operations.begin(), payload.operations.end(), 0,
+                         [](int total, const Operation& op) {
+                           return total + op.duration;
+                         }));
+
+  sat::CpModelBuilder model;
+  std::vector<OperationVars> vars;
+  vars.reserve(payload.operations.size());
+  std::map<std::pair<int, int>, int> by_job_step;
+  std::vector<std::vector<sat::IntervalVar>> intervals_by_machine(
+      payload.num_machines);
+  std::vector<sat::IntVar> ends;
+  ends.reserve(payload.operations.size());
+
+  for (int idx = 0; idx < static_cast<int>(payload.operations.size()); ++idx) {
+    const Operation& op = payload.operations[idx];
+    if (op.machine_id < 0 || op.machine_id >= payload.num_machines) {
+      throw std::runtime_error("operation machine id is out of range");
+    }
+    const std::string name = OpName(op);
+    sat::IntVar start =
+        model.NewIntVar(operations_research::Domain(0, horizon))
+            .WithName(name + "_start");
+    sat::IntVar end = model.NewIntVar(operations_research::Domain(0, horizon))
+                          .WithName(name + "_end");
+    sat::IntervalVar interval =
+        model.NewIntervalVar(start, op.duration, end).WithName(name);
+    vars.push_back(OperationVars{start, end, interval});
+    by_job_step[{op.job_id, op.op_index}] = idx;
+    intervals_by_machine[op.machine_id].push_back(interval);
+    ends.push_back(end);
+  }
+
+  for (int job_id = 0; job_id < payload.num_jobs; ++job_id) {
+    for (int op_index = 0;; ++op_index) {
+      auto current = by_job_step.find({job_id, op_index});
+      auto next = by_job_step.find({job_id, op_index + 1});
+      if (current == by_job_step.end() || next == by_job_step.end()) {
+        break;
+      }
+      model.AddGreaterOrEqual(vars[next->second].start, vars[current->second].end);
+    }
+  }
+
+  for (const auto& machine_intervals : intervals_by_machine) {
+    model.AddNoOverlap(machine_intervals);
+  }
+
+  sat::IntVar makespan =
+      model.NewIntVar(operations_research::Domain(0, horizon)).WithName("makespan");
+  model.AddMaxEquality(makespan, ends);
+  model.Minimize(makespan);
+
+  sat::Model solver_model;
+  sat::SatParameters parameters;
+  parameters.set_max_time_in_seconds(std::max(0.1, time_limit));
+  parameters.set_num_search_workers(1);
+  parameters.set_random_seed(1);
+  parameters.set_log_search_progress(false);
+  solver_model.Add(sat::NewSatParameters(parameters));
+
+  const sat::CpSolverResponse response =
+      sat::SolveCpModel(model.Build(), &solver_model);
+  if (response.status() != sat::CpSolverStatus::OPTIMAL &&
+      response.status() != sat::CpSolverStatus::FEASIBLE) {
+    throw std::runtime_error("OR-Tools CP-SAT found no feasible solution");
+  }
+
+  json::array operations;
+  for (int idx = 0; idx < static_cast<int>(payload.operations.size()); ++idx) {
+    const Operation& op = payload.operations[idx];
+    json::object out;
+    out["job_id"] = op.job_id;
+    out["op_index"] = op.op_index;
+    out["machine_id"] = op.machine_id;
+    out["start"] = static_cast<int>(sat::SolutionIntegerValue(response, vars[idx].start));
+    out["duration"] = op.duration;
+    operations.push_back(out);
+  }
+
+  json::object output;
+  output["operations"] = operations;
+  output["reported_makespan"] =
+      static_cast<int>(sat::SolutionIntegerValue(response, makespan));
+  return output;
+}
+
+}  // namespace
+
+int main(int argc, char* argv[]) {
+  if (argc == 2 && std::string(argv[1]) == "--version") {
+    std::cout << operations_research::OrToolsMajorVersion() << "."
+              << operations_research::OrToolsMinorVersion() << "."
+              << operations_research::OrToolsPatchVersion() << '\n';
+    return EXIT_SUCCESS;
+  }
+  InitGoogle(argv[0], &argc, &argv, true);
+  absl::SetStderrThreshold(absl::LogSeverityAtLeast::kError);
+
+  try {
+    if (argc != 2) {
+      throw std::runtime_error(
+          "usage: job_shop_scheduling_ortools <time_limit_seconds>");
+    }
+    const double time_limit = std::stod(argv[1]);
+    const std::string input((std::istreambuf_iterator<char>(std::cin)),
+                            std::istreambuf_iterator<char>());
+    std::cout << json::serialize(Solve(ParsePayload(input), time_limit)) << '\n';
+    return EXIT_SUCCESS;
+  } catch (const std::exception& error) {
+    std::cerr << error.what() << '\n';
+    return EXIT_FAILURE;
+  }
+}
diff --git a/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solver.py b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solver.py
index e8cf4ba..386bcc5 100644
--- a/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solver.py
+++ b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solver.py
@@ -1,34 +1,53 @@
 from __future__ import annotations
 
+from pathlib import Path
 from typing import Callable
 
-from job_shop_bench.domain.models import JobShopInstance, ScheduledOperation, Solution
+from job_shop_bench.domain.models import JobShopInstance, Solution
+from job_shop_bench.solver.ortools import solve_with_ortools
 from solverforge_bench.model import SolverVersion
+from solverforge_bench.solver_versions import (
+    cargo_dependency_version,
+    executable_version,
+    maven_property_version,
+    versions_for_solvers,
+)
 
-AVAILABLE_METHODS = ["solverforge"]
+AVAILABLE_METHODS = ["solverforge", "timefold", "ortools"]
+_SOLVER_DIR = Path(__file__).resolve().parent
 
 
-def create_solver(method: str, time_limit: int) -> Callable[[JobShopInstance, int], Solution]:
-    if method != "solverforge":
-        raise ValueError(f"Unknown solver: {method}")
+def create_solver(
+    method: str, time_limit: int
+) -> Callable[[JobShopInstance, int], Solution]:
+    if method not in AVAILABLE_METHODS:
+        raise ValueError(
+            f"Unknown method '{method}'. Available: {', '.join(AVAILABLE_METHODS)}"
+        )
 
-    def solve(instance: JobShopInstance, _time_limit: int) -> Solution:
-        # Deterministic earliest-start dispatch baseline.
-        machine_ready = [0] * instance.num_machines
-        job_ready = [0] * instance.num_jobs
-        out: list[ScheduledOperation] = []
-        for job in instance.operations_by_job:
-            for op in job:
-                start = max(job_ready[op.job_id], machine_ready[op.machine_id])
-                out.append(ScheduledOperation(job_id=op.job_id, op_index=op.op_index, machine_id=op.machine_id, start=start, duration=op.duration))
-                finish = start + op.duration
-                job_ready[op.job_id] = finish
-                machine_ready[op.machine_id] = finish
-        makespan = max(job_ready) if job_ready else 0
-        return Solution(operations=tuple(out), reported_makespan=makespan)
+    if method == "solverforge":
+        from job_shop_bench.solver.solverforge import solve_with_solverforge
 
-    return solve
+        return solve_with_solverforge
+
+    if method == "timefold":
+        from job_shop_bench.solver.timefold import solve_with_timefold
+
+        return solve_with_timefold
+
+    return solve_with_ortools
 
 
 def solver_versions(solvers: list[str]) -> dict[str, SolverVersion]:
-    return {s: SolverVersion(solver=s, version="baseline-dispatch", source="benchmark") for s in solvers}
+    resolvers = {
+        "solverforge": cargo_dependency_version(
+            _SOLVER_DIR / "solverforge_jssp" / "Cargo.toml", "solverforge"
+        ),
+        "timefold": maven_property_version(
+            _SOLVER_DIR / "timefold" / "pom.xml", "timefold.version"
+        ),
+        "ortools": executable_version(
+            _SOLVER_DIR / "ortools" / "target" / "job_shop_scheduling_ortools"
+        ),
+    }
+    return versions_for_solvers(solvers, resolvers)
diff --git a/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge.py b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge.py
new file mode 100644
index 0000000..facedde
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge.py
@@ -0,0 +1,42 @@
+from __future__ import annotations
+
+import json
+import os
+from pathlib import Path
+
+import solverforge_jssp
+
+from job_shop_bench.domain.models import (
+    JobShopInstance,
+    ScheduledOperation,
+    Solution,
+)
+from job_shop_bench.solver.instance_json import serialize_instance
+
+SOLVERFORGE_CRATE_DIR = Path(__file__).resolve().parent / "solverforge_jssp"
+
+
+def solve_with_solverforge(instance: JobShopInstance, time_limit: int) -> Solution:
+    instance_json = serialize_instance(instance)
+
+    prev_cwd = os.getcwd()
+    os.chdir(SOLVERFORGE_CRATE_DIR)
+    try:
+        result_json = solverforge_jssp.solve_jssp(instance_json, time_limit)
+    finally:
+        os.chdir(prev_cwd)
+
+    output = json.loads(result_json)
+    return Solution(
+        operations=[
+            ScheduledOperation(
+                job_id=op["job_id"],
+                op_index=op["op_index"],
+                machine_id=op["machine_id"],
+                start=op["start"],
+                duration=op["duration"],
+            )
+            for op in output["operations"]
+        ],
+        reported_makespan=output["reported_makespan"],
+    )
diff --git a/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp/Cargo.lock b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp/Cargo.lock
new file mode 100644
index 0000000..92935e2
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp/Cargo.lock
@@ -0,0 +1,944 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
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+ "cfg-if",
+ "cpufeatures",
+ "rand_core",
+]
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+ "libc",
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+ "crossbeam-epoch",
+ "crossbeam-utils",
+]
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+[[package]]
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+ "crossbeam-utils",
+]
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+[[package]]
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+
+[[package]]
+name = "equivalent"
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diff --git a/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp/Cargo.toml b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp/Cargo.toml
new file mode 100644
index 0000000..67406eb
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp/Cargo.toml
@@ -0,0 +1,20 @@
+[package]
+name = "solverforge-jssp"
+version = "0.1.0"
+edition = "2021"
+description = "SolverForge JSPLIB job-shop scheduling solver for benchmark comparison"
+publish = false
+
+[lib]
+name = "solverforge_jssp"
+crate-type = ["cdylib"]
+
+[dependencies]
+solverforge = { version = "0.14.1", path = "../../../../../../../solverforge/crates/solverforge" }
+pyo3 = { version = "0.28", features = ["extension-module"] }
+serde = { version = "1", features = ["derive"] }
+serde_json = "1"
+
+[profile.release]
+opt-level = 3
+lto = true
diff --git a/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp/pyproject.toml b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp/pyproject.toml
new file mode 100644
index 0000000..26ede8e
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp/pyproject.toml
@@ -0,0 +1,11 @@
+[build-system]
+requires = ["maturin>=1,<2"]
+build-backend = "maturin"
+
+[project]
+name = "solverforge-jssp"
+version = "0.1.0"
+requires-python = ">=3.14,<3.15"
+
+[tool.maturin]
+features = ["pyo3/extension-module"]
diff --git a/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp/solver.toml b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp/solver.toml
new file mode 100644
index 0000000..454d593
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp/solver.toml
@@ -0,0 +1,8 @@
+[[phases]]
+type = "construction_heuristic"
+construction_heuristic_type = "first_fit"
+entity_class = "JsspOperation"
+variable_name = "start"
+
+[[phases]]
+type = "local_search"
diff --git a/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp/src/constraints.rs b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp/src/constraints.rs
new file mode 100644
index 0000000..ddabfb1
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp/src/constraints.rs
@@ -0,0 +1,140 @@
+use std::collections::BTreeMap;
+
+use solverforge::prelude::*;
+use solverforge::stream::collector::{Accumulator, Collector};
+
+use crate::domain::{JsspOperation, JsspPlan};
+
+pub fn define_constraints() -> impl ConstraintSet<JsspPlan, HardSoftScore> {
+    let assigned_start = ConstraintFactory::<JsspPlan, HardSoftScore>::new()
+        .for_each(JsspPlan::operations())
+        .unassigned()
+        .penalize(HardSoftScore::ONE_HARD)
+        .named("assignedStart");
+
+    let job_precedence = ConstraintFactory::<JsspPlan, HardSoftScore>::new()
+        .for_each(JsspPlan::operations())
+        .join((
+            ConstraintFactory::<JsspPlan, HardSoftScore>::new().for_each(JsspPlan::operations()),
+            |left: &JsspOperation, right: &JsspOperation| {
+                left.job_id == right.job_id
+                    && left.op_index + 1 == right.op_index
+                    && left.start.is_some()
+                    && right.start.is_some()
+            },
+        ))
+        .penalize(precedence_penalty as fn(&JsspOperation, &JsspOperation) -> HardSoftScore)
+        .named("jobPrecedence");
+
+    let machine_no_overlap = ConstraintFactory::<JsspPlan, HardSoftScore>::new()
+        .for_each(JsspPlan::operations())
+        .join((
+            ConstraintFactory::<JsspPlan, HardSoftScore>::new().for_each(JsspPlan::operations()),
+            |left: &JsspOperation, right: &JsspOperation| {
+                left.id < right.id
+                    && left.machine_id == right.machine_id
+                    && left.start.is_some()
+                    && right.start.is_some()
+                    && overlaps(left, right)
+            },
+        ))
+        .penalize(overlap_penalty as fn(&JsspOperation, &JsspOperation) -> HardSoftScore)
+        .named("machineNoOverlap");
+
+    let makespan = ConstraintFactory::<JsspPlan, HardSoftScore>::new()
+        .for_each(JsspPlan::operations())
+        .filter(|operation: &JsspOperation| operation.start.is_some())
+        .group_by(|_operation: &JsspOperation| 0usize, MaxEndCollector)
+        .penalize(|_group: &usize, makespan: &usize| HardSoftScore::of_soft(*makespan as i64))
+        .named("makespan");
+
+    (assigned_start, job_precedence, machine_no_overlap, makespan)
+}
+
+fn precedence_penalty(previous: &JsspOperation, next: &JsspOperation) -> HardSoftScore {
+    let violation = previous
+        .end()
+        .zip(next.start)
+        .map(|(previous_end, next_start)| previous_end.saturating_sub(next_start))
+        .unwrap_or(1);
+    HardSoftScore::of_hard(violation as i64)
+}
+
+fn overlaps(left: &JsspOperation, right: &JsspOperation) -> bool {
+    let (Some(left_start), Some(left_end), Some(right_start), Some(right_end)) =
+        (left.start, left.end(), right.start, right.end())
+    else {
+        return false;
+    };
+    left_start < right_end && right_start < left_end
+}
+
+fn overlap_penalty(left: &JsspOperation, right: &JsspOperation) -> HardSoftScore {
+    let (Some(left_start), Some(left_end), Some(right_start), Some(right_end)) =
+        (left.start, left.end(), right.start, right.end())
+    else {
+        return HardSoftScore::of_hard(1);
+    };
+    let overlap = left_end
+        .min(right_end)
+        .saturating_sub(left_start.max(right_start));
+    HardSoftScore::of_hard(overlap as i64)
+}
+
+struct MaxEndCollector;
+
+impl Collector<&JsspOperation> for MaxEndCollector {
+    type Value = usize;
+    type Result = usize;
+    type Accumulator = MaxEndAccumulator;
+
+    fn extract(&self, operation: &JsspOperation) -> Self::Value {
+        operation.end().unwrap_or(0)
+    }
+
+    fn create_accumulator(&self) -> Self::Accumulator {
+        MaxEndAccumulator {
+            counts_by_end: BTreeMap::new(),
+            max_end: 0,
+        }
+    }
+}
+
+struct MaxEndAccumulator {
+    counts_by_end: BTreeMap<usize, usize>,
+    max_end: usize,
+}
+
+impl Accumulator<usize, usize> for MaxEndAccumulator {
+    type Retraction = usize;
+
+    fn accumulate(&mut self, end: usize) -> Self::Retraction {
+        *self.counts_by_end.entry(end).or_insert(0) += 1;
+        self.max_end = self.max_end.max(end);
+        end
+    }
+
+    fn retract(&mut self, end: Self::Retraction) {
+        if let Some(count) = self.counts_by_end.get_mut(&end) {
+            *count -= 1;
+            if *count == 0 {
+                self.counts_by_end.remove(&end);
+            }
+        }
+        if end == self.max_end {
+            self.max_end = self
+                .counts_by_end
+                .last_key_value()
+                .map_or(0, |(end, _)| *end);
+        }
+    }
+
+    fn with_result<T>(&self, f: impl FnOnce(&usize) -> T) -> T {
+        f(&self.max_end)
+    }
+
+    fn reset(&mut self) {
+        self.counts_by_end.clear();
+        self.max_end = 0;
+    }
+}
diff --git a/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp/src/domain.rs b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp/src/domain.rs
new file mode 100644
index 0000000..5366e52
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp/src/domain.rs
@@ -0,0 +1,61 @@
+use solverforge::prelude::*;
+
+#[problem_fact]
+pub struct StartValue {
+    #[planning_id]
+    pub id: usize,
+}
+
+#[planning_entity]
+pub struct JsspOperation {
+    #[planning_id]
+    pub id: usize,
+    pub job_id: usize,
+    pub op_index: usize,
+    pub machine_id: usize,
+    pub duration: usize,
+
+    #[planning_variable(value_range_provider = "start_values", allows_unassigned = true)]
+    pub start: Option<usize>,
+}
+
+impl JsspOperation {
+    pub fn end(&self) -> Option<usize> {
+        self.start.map(|start| start + self.duration)
+    }
+}
+
+#[planning_solution(
+    constraints = "crate::constraints::define_constraints",
+    config = "crate::domain::solver_config_for_plan",
+    solver_toml = "../solver.toml"
+)]
+pub struct JsspPlan {
+    #[problem_fact_collection]
+    pub start_values: Vec<StartValue>,
+
+    #[planning_entity_collection]
+    pub operations: Vec<JsspOperation>,
+
+    #[planning_score]
+    pub score: Option<HardSoftScore>,
+
+    pub time_limit_secs: u64,
+}
+
+impl JsspPlan {
+    pub fn reported_makespan(&self) -> usize {
+        self.operations
+            .iter()
+            .filter_map(JsspOperation::end)
+            .max()
+            .unwrap_or(0)
+    }
+}
+
+pub fn solver_config_for_plan(
+    plan: &JsspPlan,
+    config: solverforge::SolverConfig,
+) -> solverforge::SolverConfig {
+    config.with_termination_seconds(plan.time_limit_secs.max(1))
+}
diff --git a/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp/src/lib.rs b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp/src/lib.rs
new file mode 100644
index 0000000..2120e95
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp/src/lib.rs
@@ -0,0 +1,178 @@
+mod constraints;
+
+solverforge::planning_model! {
+    root = "src";
+
+    mod domain;
+
+    pub use domain::JsspOperation;
+    pub use domain::JsspPlan;
+    pub use domain::StartValue;
+}
+
+use pyo3::prelude::*;
+use serde::{Deserialize, Serialize};
+use solverforge::{SolverEvent, SolverManager};
+
+static MANAGER: SolverManager<JsspPlan> = SolverManager::new();
+
+#[derive(Deserialize)]
+struct OperationInput {
+    job_id: usize,
+    op_index: usize,
+    machine_id: usize,
+    duration: usize,
+}
+
+#[derive(Deserialize)]
+struct InstanceInput {
+    num_jobs: usize,
+    num_machines: usize,
+    operations: Vec<OperationInput>,
+}
+
+#[derive(Serialize)]
+struct OperationOutput {
+    job_id: usize,
+    op_index: usize,
+    machine_id: usize,
+    start: usize,
+    duration: usize,
+}
+
+#[derive(Serialize)]
+struct SolutionOutput {
+    operations: Vec<OperationOutput>,
+    reported_makespan: usize,
+}
+
+fn dispatch_starts(input: &InstanceInput) -> Vec<usize> {
+    let mut job_ready = vec![0; input.num_jobs];
+    let mut machine_ready = vec![0; input.num_machines];
+    input
+        .operations
+        .iter()
+        .map(|operation| {
+            let start = job_ready[operation.job_id].max(machine_ready[operation.machine_id]);
+            let finish = start + operation.duration;
+            job_ready[operation.job_id] = finish;
+            machine_ready[operation.machine_id] = finish;
+            start
+        })
+        .collect()
+}
+
+fn build_plan(input: InstanceInput, time_limit_secs: u64) -> JsspPlan {
+    let horizon = input
+        .operations
+        .iter()
+        .map(|operation| operation.duration)
+        .sum::<usize>()
+        .max(1);
+    let starts = dispatch_starts(&input);
+    let operations = input
+        .operations
+        .into_iter()
+        .enumerate()
+        .map(|(id, operation)| JsspOperation {
+            id,
+            job_id: operation.job_id,
+            op_index: operation.op_index,
+            machine_id: operation.machine_id,
+            duration: operation.duration,
+            start: Some(starts[id]),
+        })
+        .collect();
+
+    JsspPlan {
+        start_values: (0..=horizon).map(|id| StartValue { id }).collect(),
+        operations,
+        score: None,
+        time_limit_secs,
+    }
+}
+
+fn solve_plan(plan: JsspPlan) -> Result<JsspPlan, String> {
+    let (job_id, mut receiver) = MANAGER
+        .solve(plan)
+        .map_err(|error| format!("SolverForge manager rejected JSSP job: {error}"))?;
+    let mut best = None;
+    let mut failure = None;
+
+    while let Some(event) = receiver.blocking_recv() {
+        match event {
+            SolverEvent::BestSolution { solution, .. } => {
+                best = Some(solution);
+            }
+            SolverEvent::Completed { solution, .. } => {
+                best = Some(solution);
+                break;
+            }
+            SolverEvent::Cancelled { .. } => {
+                break;
+            }
+            SolverEvent::Failed { error, .. } => {
+                failure = Some(format!("SolverForge JSSP job failed: {error}"));
+                break;
+            }
+            SolverEvent::Progress { .. }
+            | SolverEvent::PauseRequested { .. }
+            | SolverEvent::Paused { .. }
+            | SolverEvent::Resumed { .. } => {}
+        }
+    }
+    let _ = MANAGER.delete(job_id);
+    if let Some(error) = failure {
+        return Err(error);
+    }
+    best.ok_or_else(|| "SolverForge JSSP job produced no solution".to_string())
+}
+
+fn solution_output(plan: JsspPlan) -> Result<SolutionOutput, String> {
+    let mut operations: Vec<OperationOutput> = plan
+        .operations
+        .into_iter()
+        .map(|operation| {
+            let start = operation.start.ok_or_else(|| {
+                format!(
+                    "SolverForge returned an unassigned start for job {} operation {}",
+                    operation.job_id, operation.op_index
+                )
+            })?;
+            Ok(OperationOutput {
+                job_id: operation.job_id,
+                op_index: operation.op_index,
+                machine_id: operation.machine_id,
+                start,
+                duration: operation.duration,
+            })
+        })
+        .collect::<Result<_, String>>()?;
+    operations.sort_by_key(|operation| (operation.job_id, operation.op_index));
+    let reported_makespan = operations
+        .iter()
+        .map(|operation| operation.start + operation.duration)
+        .max()
+        .unwrap_or(0);
+    Ok(SolutionOutput {
+        operations,
+        reported_makespan,
+    })
+}
+
+#[pyfunction]
+fn solve_jssp(instance_json: &str, time_limit: u64) -> PyResult<String> {
+    let input: InstanceInput = serde_json::from_str(instance_json)
+        .map_err(|error| pyo3::exceptions::PyValueError::new_err(error.to_string()))?;
+    let plan = build_plan(input, time_limit);
+    let solved = solve_plan(plan).map_err(pyo3::exceptions::PyRuntimeError::new_err)?;
+    let output = solution_output(solved).map_err(pyo3::exceptions::PyRuntimeError::new_err)?;
+    serde_json::to_string(&output)
+        .map_err(|error| pyo3::exceptions::PyValueError::new_err(error.to_string()))
+}
+
+#[pymodule]
+fn solverforge_jssp(m: &Bound<'_, PyModule>) -> PyResult<()> {
+    m.add_function(wrap_pyfunction!(solve_jssp, m)?)?;
+    Ok(())
+}
diff --git a/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold.py b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold.py
new file mode 100644
index 0000000..70a3e26
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold.py
@@ -0,0 +1,45 @@
+from __future__ import annotations
+
+import json
+import subprocess
+import sys
+from pathlib import Path
+
+from job_shop_bench.domain.models import (
+    JobShopInstance,
+    ScheduledOperation,
+    Solution,
+)
+from job_shop_bench.solver.instance_json import serialize_instance
+
+_JAR_PATH = Path(__file__).parent / "timefold" / "target" / "timefold-jssp.jar"
+
+
+def solve_with_timefold(instance: JobShopInstance, time_limit: int) -> Solution:
+    result = subprocess.run(
+        ["java", "-jar", str(_JAR_PATH), str(time_limit)],
+        input=serialize_instance(instance).encode(),
+        capture_output=True,
+    )
+    stderr = result.stderr.decode()
+    if result.returncode != 0:
+        raise RuntimeError(
+            f"timefold solver failed (exit {result.returncode}):\n" f"{stderr}"
+        )
+    if stderr:
+        print(stderr, file=sys.stderr, end="")
+
+    output = json.loads(result.stdout)
+    return Solution(
+        operations=[
+            ScheduledOperation(
+                job_id=op["job_id"],
+                op_index=op["op_index"],
+                machine_id=op["machine_id"],
+                start=op["start"],
+                duration=op["duration"],
+            )
+            for op in output["operations"]
+        ],
+        reported_makespan=output["reported_makespan"],
+    )
diff --git a/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold/pom.xml b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold/pom.xml
new file mode 100644
index 0000000..699ff4e
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold/pom.xml
@@ -0,0 +1,75 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>com.solverforgebench</groupId>
+    <artifactId>timefold-jssp</artifactId>
+    <version>1.0-SNAPSHOT</version>
+    <packaging>jar</packaging>
+
+    <properties>
+        <maven.compiler.source>21</maven.compiler.source>
+        <maven.compiler.target>21</maven.compiler.target>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <timefold.version>2.1.0</timefold.version>
+        <jackson.version>2.18.2</jackson.version>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>ai.timefold.solver</groupId>
+            <artifactId>timefold-solver-core</artifactId>
+            <version>${timefold.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>com.fasterxml.jackson.core</groupId>
+            <artifactId>jackson-databind</artifactId>
+            <version>${jackson.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.slf4j</groupId>
+            <artifactId>slf4j-simple</artifactId>
+            <version>2.0.16</version>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-shade-plugin</artifactId>
+                <version>3.6.0</version>
+                <executions>
+                    <execution>
+                        <phase>package</phase>
+                        <goals>
+                            <goal>shade</goal>
+                        </goals>
+                        <configuration>
+                            <finalName>timefold-jssp</finalName>
+                            <createDependencyReducedPom>false</createDependencyReducedPom>
+                            <transformers>
+                                <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
+                                    <mainClass>com.solverforgebench.jssp.Main</mainClass>
+                                </transformer>
+                                <transformer implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer"/>
+                            </transformers>
+                            <filters>
+                                <filter>
+                                    <artifact>*:*</artifact>
+                                    <excludes>
+                                        <exclude>META-INF/*.SF</exclude>
+                                        <exclude>META-INF/*.DSA</exclude>
+                                        <exclude>META-INF/*.RSA</exclude>
+                                    </excludes>
+                                </filter>
+                            </filters>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+</project>
diff --git a/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold/src/main/java/com/solverforgebench/jssp/JsspConstraintProvider.java b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold/src/main/java/com/solverforgebench/jssp/JsspConstraintProvider.java
new file mode 100644
index 0000000..79c0ea5
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold/src/main/java/com/solverforgebench/jssp/JsspConstraintProvider.java
@@ -0,0 +1,70 @@
+package com.solverforgebench.jssp;
+
+import ai.timefold.solver.core.api.score.HardSoftScore;
+import ai.timefold.solver.core.api.score.stream.Constraint;
+import ai.timefold.solver.core.api.score.stream.ConstraintCollectors;
+import ai.timefold.solver.core.api.score.stream.ConstraintFactory;
+import ai.timefold.solver.core.api.score.stream.ConstraintProvider;
+import ai.timefold.solver.core.api.score.stream.Joiners;
+
+import com.solverforgebench.jssp.domain.OperationAssignment;
+
+public class JsspConstraintProvider implements ConstraintProvider {
+
+    @Override
+    public Constraint[] defineConstraints(ConstraintFactory factory) {
+        return new Constraint[]{
+                assignedStart(factory),
+                jobPrecedence(factory),
+                machineNoOverlap(factory),
+                makespan(factory),
+        };
+    }
+
+    Constraint assignedStart(ConstraintFactory factory) {
+        return factory.forEachIncludingUnassigned(OperationAssignment.class)
+                .filter(operation -> !operation.isAssigned())
+                .penalize(HardSoftScore.ONE_HARD)
+                .asConstraint("assignedStart");
+    }
+
+    Constraint jobPrecedence(ConstraintFactory factory) {
+        return factory.forEachUniquePair(OperationAssignment.class,
+                        Joiners.equal(OperationAssignment::getJobId))
+                .filter((left, right) -> left.isAssigned() && right.isAssigned())
+                .filter((left, right) -> Math.abs(left.getOpIndex() - right.getOpIndex()) == 1)
+                .penalize(HardSoftScore.ONE_HARD, JsspConstraintProvider::precedenceViolation)
+                .asConstraint("jobPrecedence");
+    }
+
+    Constraint machineNoOverlap(ConstraintFactory factory) {
+        return factory.forEachUniquePair(OperationAssignment.class,
+                        Joiners.equal(OperationAssignment::getMachineId))
+                .filter((left, right) -> left.isAssigned() && right.isAssigned())
+                .filter(JsspConstraintProvider::overlaps)
+                .penalize(HardSoftScore.ONE_HARD, JsspConstraintProvider::overlapAmount)
+                .asConstraint("machineNoOverlap");
+    }
+
+    Constraint makespan(ConstraintFactory factory) {
+        return factory.forEach(OperationAssignment.class)
+                .filter(OperationAssignment::isAssigned)
+                .groupBy(ConstraintCollectors.max(OperationAssignment::getEnd))
+                .penalize(HardSoftScore.ONE_SOFT, value -> value == null ? 0 : value)
+                .asConstraint("makespan");
+    }
+
+    private static int precedenceViolation(OperationAssignment left, OperationAssignment right) {
+        OperationAssignment previous = left.getOpIndex() < right.getOpIndex() ? left : right;
+        OperationAssignment next = previous == left ? right : left;
+        return Math.max(0, previous.getEnd() - next.getStart());
+    }
+
+    private static boolean overlaps(OperationAssignment left, OperationAssignment right) {
+        return left.getStart() < right.getEnd() && right.getStart() < left.getEnd();
+    }
+
+    private static int overlapAmount(OperationAssignment left, OperationAssignment right) {
+        return Math.max(0, Math.min(left.getEnd(), right.getEnd()) - Math.max(left.getStart(), right.getStart()));
+    }
+}
diff --git a/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold/src/main/java/com/solverforgebench/jssp/Main.java b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold/src/main/java/com/solverforgebench/jssp/Main.java
new file mode 100644
index 0000000..efee2b6
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold/src/main/java/com/solverforgebench/jssp/Main.java
@@ -0,0 +1,138 @@
+package com.solverforgebench.jssp;
+
+import ai.timefold.solver.core.api.solver.Solver;
+import ai.timefold.solver.core.api.solver.SolverFactory;
+import ai.timefold.solver.core.config.solver.SolverConfig;
+import ai.timefold.solver.core.config.solver.termination.TerminationConfig;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.databind.DeserializationFeature;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.solverforgebench.jssp.domain.JsspSchedule;
+import com.solverforgebench.jssp.domain.OperationAssignment;
+
+import java.util.ArrayList;
+import java.util.Comparator;
+import java.util.List;
+
+public class Main {
+
+    static class OperationInput {
+        @JsonProperty("job_id")
+        public int jobId;
+        @JsonProperty("op_index")
+        public int opIndex;
+        @JsonProperty("machine_id")
+        public int machineId;
+        public int duration;
+    }
+
+    static class InstanceInput {
+        @JsonProperty("num_jobs")
+        public int numJobs;
+        @JsonProperty("num_machines")
+        public int numMachines;
+        public List<OperationInput> operations;
+    }
+
+    static class OperationOutput {
+        @JsonProperty("job_id")
+        public int jobId;
+        @JsonProperty("op_index")
+        public int opIndex;
+        @JsonProperty("machine_id")
+        public int machineId;
+        public int start;
+        public int duration;
+
+        OperationOutput(OperationAssignment operation) {
+            this.jobId = operation.getJobId();
+            this.opIndex = operation.getOpIndex();
+            this.machineId = operation.getMachineId();
+            this.start = operation.getStart();
+            this.duration = operation.getDuration();
+        }
+    }
+
+    static class JsspOutput {
+        public List<OperationOutput> operations;
+        @JsonProperty("reported_makespan")
+        public int reportedMakespan;
+
+        JsspOutput(List<OperationOutput> operations, int reportedMakespan) {
+            this.operations = operations;
+            this.reportedMakespan = reportedMakespan;
+        }
+    }
+
+    public static void main(String[] args) throws Exception {
+        if (args.length != 1) {
+            System.err.println("Usage: java -jar timefold-jssp.jar <time_limit_seconds>");
+            System.exit(1);
+        }
+        long timeLimitSeconds = Long.parseLong(args[0]);
+
+        ObjectMapper mapper = new ObjectMapper()
+                .configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
+        InstanceInput input = mapper.readValue(System.in, InstanceInput.class);
+
+        int horizon = input.operations.stream().mapToInt(operation -> operation.duration).sum();
+        List<Integer> startRange = new ArrayList<>();
+        for (int i = 0; i <= horizon; i++) {
+            startRange.add(i);
+        }
+
+        List<Integer> dispatchStarts = dispatchStarts(input);
+        List<OperationAssignment> operations = new ArrayList<>();
+        for (int i = 0; i < input.operations.size(); i++) {
+            OperationInput operation = input.operations.get(i);
+            operations.add(new OperationAssignment(
+                    i,
+                    operation.jobId,
+                    operation.opIndex,
+                    operation.machineId,
+                    operation.duration,
+                    dispatchStarts.get(i)));
+        }
+
+        JsspSchedule problem = new JsspSchedule(startRange, operations);
+        SolverConfig solverConfig = new SolverConfig()
+                .withSolutionClass(JsspSchedule.class)
+                .withEntityClasses(OperationAssignment.class)
+                .withConstraintProviderClass(JsspConstraintProvider.class)
+                .withRandomSeed(1L)
+                .withMoveThreadCount(SolverConfig.MOVE_THREAD_COUNT_NONE)
+                .withTerminationConfig(new TerminationConfig()
+                        .withSpentLimit(java.time.Duration.ofSeconds(timeLimitSeconds)));
+
+        SolverFactory<JsspSchedule> solverFactory = SolverFactory.create(solverConfig);
+        Solver<JsspSchedule> solver = solverFactory.buildSolver();
+        JsspSchedule solution = solver.solve(problem);
+
+        List<OperationOutput> outputOperations = solution.getOperations().stream()
+                .sorted(Comparator
+                        .comparingInt(OperationAssignment::getJobId)
+                        .thenComparingInt(OperationAssignment::getOpIndex))
+                .map(OperationOutput::new)
+                .toList();
+        int makespan = solution.getOperations().stream()
+                .mapToInt(OperationAssignment::getEnd)
+                .max()
+                .orElse(0);
+        mapper.writeValue(System.out, new JsspOutput(outputOperations, makespan));
+    }
+
+    private static List<Integer> dispatchStarts(InstanceInput input) {
+        int[] jobReady = new int[input.numJobs];
+        int[] machineReady = new int[input.numMachines];
+        List<Integer> starts = new ArrayList<>();
+        for (OperationInput operation : input.operations) {
+            int start = Math.max(jobReady[operation.jobId], machineReady[operation.machineId]);
+            starts.add(start);
+            int finish = start + operation.duration;
+            jobReady[operation.jobId] = finish;
+            machineReady[operation.machineId] = finish;
+        }
+        return starts;
+    }
+}
diff --git a/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold/src/main/java/com/solverforgebench/jssp/domain/JsspSchedule.java b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold/src/main/java/com/solverforgebench/jssp/domain/JsspSchedule.java
new file mode 100644
index 0000000..40e7351
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold/src/main/java/com/solverforgebench/jssp/domain/JsspSchedule.java
@@ -0,0 +1,48 @@
+package com.solverforgebench.jssp.domain;
+
+import ai.timefold.solver.core.api.domain.solution.PlanningEntityCollectionProperty;
+import ai.timefold.solver.core.api.domain.solution.PlanningScore;
+import ai.timefold.solver.core.api.domain.solution.PlanningSolution;
+import ai.timefold.solver.core.api.domain.solution.ProblemFactCollectionProperty;
+import ai.timefold.solver.core.api.domain.valuerange.ValueRangeProvider;
+import ai.timefold.solver.core.api.score.HardSoftScore;
+
+import java.util.List;
+
+@PlanningSolution
+public class JsspSchedule {
+
+    @ProblemFactCollectionProperty
+    @ValueRangeProvider(id = "startRange")
+    private List<Integer> startRange;
+
+    @PlanningEntityCollectionProperty
+    private List<OperationAssignment> operations;
+
+    @PlanningScore
+    private HardSoftScore score;
+
+    public JsspSchedule() {
+    }
+
+    public JsspSchedule(List<Integer> startRange, List<OperationAssignment> operations) {
+        this.startRange = startRange;
+        this.operations = operations;
+    }
+
+    public List<Integer> getStartRange() {
+        return startRange;
+    }
+
+    public List<OperationAssignment> getOperations() {
+        return operations;
+    }
+
+    public HardSoftScore getScore() {
+        return score;
+    }
+
+    public void setScore(HardSoftScore score) {
+        this.score = score;
+    }
+}
diff --git a/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold/src/main/java/com/solverforgebench/jssp/domain/OperationAssignment.java b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold/src/main/java/com/solverforgebench/jssp/domain/OperationAssignment.java
new file mode 100644
index 0000000..74493af
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold/src/main/java/com/solverforgebench/jssp/domain/OperationAssignment.java
@@ -0,0 +1,67 @@
+package com.solverforgebench.jssp.domain;
+
+import ai.timefold.solver.core.api.domain.common.PlanningId;
+import ai.timefold.solver.core.api.domain.entity.PlanningEntity;
+import ai.timefold.solver.core.api.domain.variable.PlanningVariable;
+
+@PlanningEntity
+public class OperationAssignment {
+
+    @PlanningId
+    private int id;
+    private int jobId;
+    private int opIndex;
+    private int machineId;
+    private int duration;
+
+    @PlanningVariable(valueRangeProviderRefs = "startRange")
+    private Integer start;
+
+    public OperationAssignment() {
+    }
+
+    public OperationAssignment(int id, int jobId, int opIndex, int machineId, int duration, Integer start) {
+        this.id = id;
+        this.jobId = jobId;
+        this.opIndex = opIndex;
+        this.machineId = machineId;
+        this.duration = duration;
+        this.start = start;
+    }
+
+    public int getId() {
+        return id;
+    }
+
+    public int getJobId() {
+        return jobId;
+    }
+
+    public int getOpIndex() {
+        return opIndex;
+    }
+
+    public int getMachineId() {
+        return machineId;
+    }
+
+    public int getDuration() {
+        return duration;
+    }
+
+    public Integer getStart() {
+        return start;
+    }
+
+    public void setStart(Integer start) {
+        this.start = start;
+    }
+
+    public boolean isAssigned() {
+        return start != null;
+    }
+
+    public int getEnd() {
+        return start == null ? 0 : start + duration;
+    }
+}
diff --git a/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold/src/main/resources/simplelogger.properties b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold/src/main/resources/simplelogger.properties
new file mode 100644
index 0000000..328678b
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold/src/main/resources/simplelogger.properties
@@ -0,0 +1,2 @@
+org.slf4j.simpleLogger.defaultLogLevel=warn
+org.slf4j.simpleLogger.log.ai.timefold=warn

From 72cbbcdd90eeee02085b6e8cc10230fb0fffaff9 Mon Sep 17 00:00:00 2001
From: Vittorio Distefano <info@vdistefano.studio>
Date: Sun, 17 May 2026 19:27:17 +0200
Subject: [PATCH 10/29] build(job-shop): wire benchmark targets and nightly
 config

Add the Job-Shop Scheduling build targets for the SolverForge Rust extension, Timefold Java package, and OR-Tools C++ executable.

The benchmark and database targets now invoke the shared root harness for canonical and quick JSPLIB runs, keeping orchestration, logging, CSV output, watchdog handling, and persistence in solverforge_bench.

Nightly configuration now includes the canonical job-shop dataset so the third benchmark family participates in the same scheduled benchmark entrypoint as CVRP and employee scheduling.
---
 Makefile                       | 36 ++++++++++++++++++++++++++++++----
 benchmark.nightly.example.toml |  3 +++
 2 files changed, 35 insertions(+), 4 deletions(-)

diff --git a/Makefile b/Makefile
index 468ae25..6f0015c 100644
--- a/Makefile
+++ b/Makefile
@@ -49,6 +49,9 @@ EMPLOYEE_SOLVERFORGE_DIR := $(EMPLOYEE_ROOT)/src/employee_scheduling_bench/solve
 EMPLOYEE_TIMEFOLD_POM := $(EMPLOYEE_ROOT)/src/employee_scheduling_bench/solver/timefold/pom.xml
 EMPLOYEE_ORTOOLS_DIR := $(EMPLOYEE_ROOT)/src/employee_scheduling_bench/solver/ortools
 JOBSHOP_ROOT := scalar-variable/job-shop-scheduling
+JOBSHOP_SOLVERFORGE_DIR := $(JOBSHOP_ROOT)/src/job_shop_bench/solver/solverforge_jssp
+JOBSHOP_TIMEFOLD_POM := $(JOBSHOP_ROOT)/src/job_shop_bench/solver/timefold/pom.xml
+JOBSHOP_ORTOOLS_DIR := $(JOBSHOP_ROOT)/src/job_shop_bench/solver/ortools
 ORTOOLS_VERSION ?= 9.15.6755
 ORTOOLS_ARCHIVE ?= or-tools_amd64_opensuse-leap_cpp_v$(ORTOOLS_VERSION).tar.gz
 ORTOOLS_URL ?= https://github.com/google/or-tools/releases/download/v9.15/$(ORTOOLS_ARCHIVE)
@@ -63,6 +66,7 @@ MAVEN_ENV := JAVA_HOME="$(JAVA_HOME_FOR_MAVEN)" PATH="$(JAVA_HOME_FOR_MAVEN)/bin
 .PHONY: \
 	banner venv install-python-deps build-cvrp build-cvrp-python-deps build-cvrp-solverforge build-cvrp-timefold build-cvrp-ortools build-cvrp-rustvrp build-cvrp-vroom \
 	build-employee-scheduling build-employee-scheduling-solverforge build-employee-scheduling-timefold build-employee-scheduling-ortools \
+	build-job-shop-scheduling build-job-shop-scheduling-solverforge build-job-shop-scheduling-timefold build-job-shop-scheduling-ortools \
 	bench-cvrp bench-cvrp-db bench-cvrp-quick bench-cvrp-quick-db \
 	bench-cvrp-solverforge bench-cvrp-solverforge-db \
 	bench-cvrp-solverforge-quick bench-cvrp-solverforge-quick-db \
@@ -70,8 +74,10 @@ MAVEN_ENV := JAVA_HOME="$(JAVA_HOME_FOR_MAVEN)" PATH="$(JAVA_HOME_FOR_MAVEN)/bin
 	bench-employee-scheduling-quick bench-employee-scheduling-quick-db \
 	bench-employee-scheduling-solverforge bench-employee-scheduling-solverforge-db \
 	bench-employee-scheduling-solverforge-quick bench-employee-scheduling-solverforge-quick-db \
+	bench-job-shop-scheduling bench-job-shop-scheduling-db \
+	bench-job-shop-scheduling-quick bench-job-shop-scheduling-quick-db \
 	bench-nightly-db \
-	validate-cvrp validate-employee-scheduling validate-employee-model-parity \
+	validate-cvrp validate-employee-scheduling validate-employee-model-parity validate-job-shop-scheduling \
 	db-check db-create db-migrate db-reset normalize-results
 
 # ============== Default Target ==============
@@ -216,9 +222,10 @@ bench-employee-scheduling-solverforge-quick: build-employee-scheduling-solverfor
 bench-employee-scheduling-solverforge-quick-db: build-employee-scheduling-solverforge db-migrate
 	$(PINNED_BENCH) "$(PYTHON)" scripts/run_benchmark.py employee-scheduling $(BENCH_CONFIG_ARG) --run-kind quick --solver solverforge --datasets n005w4 --time-limits 1 10 $(BENCH_DB_ARGS) $(BENCH_ARGS)
 
-bench-nightly-db: build-cvrp build-employee-scheduling db-migrate
+bench-nightly-db: build-cvrp build-employee-scheduling build-job-shop-scheduling db-migrate
 	$(PINNED_BENCH) "$(PYTHON)" scripts/run_benchmark.py cvrp $(NIGHTLY_CONFIG_ARG) $(BENCH_DB_ARGS) $(NIGHTLY_ARGS)
 	$(PINNED_BENCH) "$(PYTHON)" scripts/run_benchmark.py employee-scheduling $(NIGHTLY_CONFIG_ARG) $(BENCH_DB_ARGS) $(NIGHTLY_ARGS)
+	$(PINNED_BENCH) "$(PYTHON)" scripts/run_benchmark.py job-shop-scheduling $(NIGHTLY_CONFIG_ARG) $(BENCH_DB_ARGS) $(NIGHTLY_ARGS)
 
 validate-employee-scheduling: banner
 	cd $(EMPLOYEE_ROOT) && PYTHONPATH=../../src:../../list-variable/cvrp/src:src "$(PYTHON)" scripts/validate_all.py
@@ -232,11 +239,32 @@ normalize-results: banner
 	"$(PYTHON)" scripts/normalize_results.py --input "$(INPUT)" --output "$(OUTPUT)" $(ARGS)
 
 
-bench-job-shop-scheduling:
+build-job-shop-scheduling: banner install-python-deps build-job-shop-scheduling-solverforge build-job-shop-scheduling-timefold build-job-shop-scheduling-ortools
+
+build-job-shop-scheduling-solverforge: banner install-python-deps
+	cd $(JOBSHOP_SOLVERFORGE_DIR) && maturin build --release --locked -i "$(PYTHON)"
+	PIP_DISABLE_PIP_VERSION_CHECK=1 "$(PIP)" install --force-reinstall $$(ls -t $(JOBSHOP_SOLVERFORGE_DIR)/target/wheels/*.whl | head -1)
+
+build-job-shop-scheduling-timefold: banner
+	$(MAVEN_ENV) mvn -f $(JOBSHOP_TIMEFOLD_POM) package -q
+
+build-job-shop-scheduling-ortools: banner $(ORTOOLS_ROOT)/lib64/cmake/ortools/ortoolsConfig.cmake
+	cmake -S $(JOBSHOP_ORTOOLS_DIR) -B build/job-shop-scheduling-ortools -DCMAKE_PREFIX_PATH="$(ORTOOLS_ROOT)" -DORTOOLS_ROOT="$(ORTOOLS_ROOT)"
+	cmake --build build/job-shop-scheduling-ortools --parallel
+	mkdir -p $(JOBSHOP_ORTOOLS_DIR)/target
+	cp build/job-shop-scheduling-ortools/job_shop_scheduling_ortools $(JOBSHOP_ORTOOLS_DIR)/target/
+
+bench-job-shop-scheduling: build-job-shop-scheduling
 	$(PINNED_BENCH) "$(PYTHON)" scripts/run_benchmark.py job-shop-scheduling $(BENCH_CONFIG_ARG) --dataset-set canonical --time-limits 1 10 60 $(BENCH_ARGS)
 
-bench-job-shop-scheduling-quick:
+bench-job-shop-scheduling-db: build-job-shop-scheduling db-migrate
+	$(PINNED_BENCH) "$(PYTHON)" scripts/run_benchmark.py job-shop-scheduling $(BENCH_CONFIG_ARG) --dataset-set canonical --time-limits 1 10 60 $(BENCH_DB_ARGS) $(BENCH_ARGS)
+
+bench-job-shop-scheduling-quick: build-job-shop-scheduling
 	$(PINNED_BENCH) "$(PYTHON)" scripts/run_benchmark.py job-shop-scheduling $(BENCH_CONFIG_ARG) --run-kind quick --dataset-set quick --time-limits 1 10 $(BENCH_ARGS)
 
+bench-job-shop-scheduling-quick-db: build-job-shop-scheduling db-migrate
+	$(PINNED_BENCH) "$(PYTHON)" scripts/run_benchmark.py job-shop-scheduling $(BENCH_CONFIG_ARG) --run-kind quick --dataset-set quick --time-limits 1 10 $(BENCH_DB_ARGS) $(BENCH_ARGS)
+
 validate-job-shop-scheduling: banner
 	cd $(JOBSHOP_ROOT) && PYTHONPATH=../../src:src "$(PYTHON)" scripts/validate_all.py
diff --git a/benchmark.nightly.example.toml b/benchmark.nightly.example.toml
index 45137dc..249d828 100644
--- a/benchmark.nightly.example.toml
+++ b/benchmark.nightly.example.toml
@@ -16,3 +16,6 @@ capture_solver_output = true
 
 [benchmarks.employee-scheduling]
 dataset_set = "canonical"
+
+[benchmarks.job-shop-scheduling]
+dataset_set = "canonical"

From 24169a751d37df290f9e46979b44a93255249f07 Mon Sep 17 00:00:00 2001
From: Vittorio Distefano <info@vdistefano.studio>
Date: Sun, 17 May 2026 19:27:31 +0200
Subject: [PATCH 11/29] docs(job-shop): align benchmark documentation with
 shipped solvers

Update the repository README and agent guide so Job-Shop Scheduling is documented as the third active benchmark family rather than a partial scaffold.

The docs now describe the JSPLIB instance groups, registered SolverForge, Timefold, and OR-Tools adapters, build and smoke-test targets, shared harness invocation, TOML configuration, nightly behavior, and JSSP-specific CSV fields.

Refresh the JSSP design note from future proposal language to the implementation that exists in this branch, including the strict schedule contract and makespan objective. No wireframe documents exist in this worktree, so there were no wireframe files to update.
---
 AGENTS.md             |  48 +++++++++++----
 README.md             |  68 +++++++++++++++++----
 docs_jssp_proposal.md | 135 ++++++++++++++++++++++++------------------
 3 files changed, 170 insertions(+), 81 deletions(-)

diff --git a/AGENTS.md b/AGENTS.md
index 1bfa0a7..2dae42c 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -26,6 +26,11 @@
   configuration.
 - `list-variable/cvrp/` contains the canonical CVRP benchmark imported from `~/hack/cvrp_solver_comparison`, with source in `src/cvrp_bench/` and instances under `data/X/`.
 - `scalar-variable/employee-scheduling/` contains the nurse rostering benchmark, with source in `src/employee_scheduling_bench/` and INRC2 datasets under `data/inrc2/`.
+- `scalar-variable/job-shop-scheduling/` contains the JSPLIB job-shop
+  scheduling benchmark, with source in `src/job_shop_bench/`, instances under
+  `data/jsplib/`, a SolverForge Rust/PyO3 adapter under
+  `solver/solverforge_jssp/`, a Timefold Java adapter under `solver/timefold/`,
+  and an OR-Tools C++ CP-SAT adapter under `solver/ortools/`.
 - `archive/` holds previous reports and older standalone scripts; do not treat it as active source.
 
 ## Build, Test, and Development Commands
@@ -61,16 +66,27 @@
   the same quick employee-scheduling sample.
 - `make bench-employee-scheduling-solverforge-quick-db` persists that same
   SolverForge-only employee-scheduling smoke path after applying migrations.
-- `make bench-nightly-db` is the cronable nightly entrypoint: it builds both
+- `make validate-job-shop-scheduling` validates the bundled JSPLIB manifest and
+  parser output.
+- `make build-job-shop-scheduling` builds the SolverForge JSSP Python extension,
+  the Timefold JSSP fat JAR, and the native OR-Tools JSSP executable.
+- `make bench-job-shop-scheduling-quick` runs the JSPLIB quick group for
+  `solverforge`, `timefold`, and `ortools` at 1s and 10s limits.
+- `make bench-job-shop-scheduling-quick-db` does the same quick
+  job-shop-scheduling run, applies database migrations first, and persists the
+  run to PostgreSQL.
+- `make bench-nightly-db` is the cronable nightly entrypoint: it builds all
   benchmark stacks, applies migrations once, then invokes the canonical root
-  harness directly for CVRP and employee scheduling. It uses
-  `benchmark.nightly.example.toml` by default and persists both runs to
+  harness directly for CVRP, employee scheduling, and job-shop scheduling. It
+  uses `benchmark.nightly.example.toml` by default and persists all runs to
   PostgreSQL.
 - `make validate-employee-model-parity` verifies that the employee-scheduling
   validator, OR-Tools model, Timefold model, and SolverForge model encode
   the same hard-feasibility clauses, candidate domains, and soft objective
   weights.
-- `make bench-cvrp` and `make bench-employee-scheduling` run the broader benchmark suites and may take longer.
+- `make bench-cvrp`, `make bench-employee-scheduling`, and
+  `make bench-job-shop-scheduling` run the broader benchmark suites and may
+  take longer.
 - `make db-check`, `make db-create`, `make db-migrate`, and `make db-reset`
   check, create, migrate, and reset the PostgreSQL benchmark warehouse
   configured by `DATABASE_URL`, or `BENCH_DATABASE_URL` when `DATABASE_URL` is
@@ -78,7 +94,7 @@
   `make db-reset` passes `DB_RESET_FLAGS ?= -y -f` to SQLx by default.
 - `make normalize-results INPUT=... OUTPUT=...` normalizes generated global CSV
   artifacts through Polars. Pass `ARGS="--format ndjson"` for NDJSON output.
-- `PYTHONPATH=src:list-variable/cvrp/src:scalar-variable/employee-scheduling/src .venv/bin/python3 scripts/run_benchmark.py <benchmark>` runs the unified root harness directly.
+- `PYTHONPATH=src:list-variable/cvrp/src:scalar-variable/employee-scheduling/src:scalar-variable/job-shop-scheduling/src .venv/bin/python3 scripts/run_benchmark.py <benchmark>` runs the unified root harness directly.
 - Add `--config benchmark.example.toml` or `BENCH_CONFIG=benchmark.example.toml`
   to load TOML configuration. Command-line options override TOML values.
 - Use `--run-kind quick|candidate|tag` for benchmark classification. `tag`
@@ -94,17 +110,29 @@
 
 ## Coding Style & Naming Conventions
 
-Use 4-space indentation, `snake_case` functions and modules, and type hints where they clarify benchmark contracts. In CVRP, keep domain models in `domain/models.py`, validation in `domain/utils.py`, and solver adapters in `solver/<name>.py`. In employee scheduling, keep loaders in `loader.py`, validation in `validation.py`, and solver adapters in `solver/<name>.py`. Adapter names should match CLI arguments such as `solverforge`, `pyvrp`, `timefold`, or `ortools`.
+Use 4-space indentation, `snake_case` functions and modules, and type hints
+where they clarify benchmark contracts. In CVRP, keep domain models in
+`domain/models.py`, validation in `domain/utils.py`, and solver adapters in
+`solver/<name>.py`. In employee scheduling, keep loaders in `loader.py`,
+validation in `validation.py`, and solver adapters in `solver/<name>.py`. In
+job-shop scheduling, keep the JSPLIB loader in `loader.py`, strict schedule
+validation in `validation.py`, Pydantic-serializable returned schedule models in
+`domain/models.py`, the solver registry in `solver/solver.py`, and native
+solver implementations under their adapter directories. Adapter names should
+match CLI arguments such as `solverforge`, `pyvrp`, `timefold`, or `ortools`.
 
 ## Testing Guidelines
 
 There is no dedicated pytest suite. Treat quick benchmark targets and validation
 scripts as smoke tests. For CVRP, run `make validate-cvrp` plus one quick
 benchmark target. For employee scheduling, run
-`make bench-employee-scheduling-quick`. For PostgreSQL or run-catalog changes,
-also run `make db-migrate` and at least one `*-db` dry run or smoke run. When
-adding a dataset or solver, include a small deterministic run and confirm
-failures are solution failures, not loader or adapter errors.
+`make bench-employee-scheduling-quick`. For job-shop scheduling, run
+`make validate-job-shop-scheduling` plus `make bench-job-shop-scheduling-quick`
+or a focused root harness run with `--solver` when only one adapter changed. For
+PostgreSQL or run-catalog changes, also run `make db-migrate` and at least one
+`*-db` dry run or smoke run. When adding a dataset or solver, include a small
+deterministic run and confirm failures are solution failures, not loader or
+adapter errors.
 
 For CI or documentation contract changes, also verify Python syntax with
 `python -m compileall -q src list-variable/cvrp/src scalar-variable/employee-scheduling/src scripts`
diff --git a/README.md b/README.md
index 5bbd1cb..d6f364b 100644
--- a/README.md
+++ b/README.md
@@ -20,8 +20,11 @@ See `WIREFRAME.md` for the current as-built repository map.
   uses the bundled INRC-II TXT corpus and compares `solverforge`,
   `timefold`, and `ortools` on nurse-to-shift assignments.
 - `scalar-variable/job-shop-scheduling/` is the job-shop scheduling benchmark. It
-  uses bundled JSPLIB-style instances and currently exposes the `solverforge`
-  adapter through the shared harness.
+  uses bundled JSPLIB instances for machine scheduling with job precedence
+  and disjunctive machine capacity constraints. It compares `solverforge`,
+  `timefold`, and `ortools` on fixed-machine operation start times. The
+  SolverForge adapter is a Rust/PyO3 planning model, the Timefold adapter is a
+  Java fat JAR, and the OR-Tools adapter is a native C++ CP-SAT executable.
 
 ## Documentation Map
 
@@ -146,16 +149,47 @@ the run.
 The canonical target uses the `canonical` group in
 `scalar-variable/employee-scheduling/data/inrc2/manifest.json`.
 
+## Job-Shop Scheduling Commands
+
+Run local JSPLIB parser and manifest validation:
+
+```sh
+make validate-job-shop-scheduling
+```
+
+Build all job-shop scheduling integrations without running a benchmark:
+
+```sh
+make build-job-shop-scheduling
+```
+
+Run the quick and canonical job-shop scheduling benchmarks:
+
+```sh
+make bench-job-shop-scheduling-quick
+make bench-job-shop-scheduling
+```
+
+The quick target runs the JSPLIB `quick` group for `solverforge`, `timefold`,
+and `ortools` at `1` and `10` seconds. The canonical target uses the
+`canonical` group in
+`scalar-variable/job-shop-scheduling/data/jsplib/manifest.json`.
+In the current bundled manifest, `quick` contains `ft06` and `la01`, while
+`canonical` contains `ft06`, `la01`, and `la02`.
+
 ## Unified Harness
 
 The root entrypoint runs the shared framework with problem-specific specs:
 
 ```sh
-PYTHONPATH=src:list-variable/cvrp/src:scalar-variable/employee-scheduling/src \
+PYTHONPATH=src:list-variable/cvrp/src:scalar-variable/employee-scheduling/src:scalar-variable/job-shop-scheduling/src \
   .venv/bin/python3 scripts/run_benchmark.py cvrp --run-kind quick --num-instances 3 --time-limits 1 10
 
-PYTHONPATH=src:list-variable/cvrp/src:scalar-variable/employee-scheduling/src \
+PYTHONPATH=src:list-variable/cvrp/src:scalar-variable/employee-scheduling/src:scalar-variable/job-shop-scheduling/src \
   .venv/bin/python3 scripts/run_benchmark.py employee-scheduling --run-kind quick --datasets n005w4 --time-limits 1 10
+
+PYTHONPATH=src:list-variable/cvrp/src:scalar-variable/employee-scheduling/src:scalar-variable/job-shop-scheduling/src \
+  .venv/bin/python3 scripts/run_benchmark.py job-shop-scheduling --run-kind quick --dataset-set quick --time-limits 1 10
 ```
 
 Shared CLI options include:
@@ -180,8 +214,8 @@ Shared CLI options include:
 --capture-solver-output | --no-capture-solver-output
 ```
 
-`cvrp` adds `--num-instances`. `employee-scheduling` adds `--dataset-set` and
-`--datasets`.
+`cvrp` adds `--num-instances`. `employee-scheduling` and
+`job-shop-scheduling` add `--dataset-set` and `--datasets`.
 
 The benchmark budget and watchdog are separate. The requested time limit is
 passed to the solver and measured with wall-clock timing around
@@ -230,7 +264,7 @@ integrity errors, such as CSV or PostgreSQL write failures, still fail the run.
 The unified harness can read benchmark settings from a TOML file:
 
 ```sh
-PYTHONPATH=src:list-variable/cvrp/src:scalar-variable/employee-scheduling/src \
+PYTHONPATH=src:list-variable/cvrp/src:scalar-variable/employee-scheduling/src:scalar-variable/job-shop-scheduling/src \
   .venv/bin/python3 scripts/run_benchmark.py --config benchmark.example.toml
 ```
 
@@ -260,6 +294,10 @@ num_instances = 3
 [benchmarks.employee-scheduling]
 dataset_set = "quick"
 datasets = ["n005w4"]
+
+[benchmarks.job-shop-scheduling]
+dataset_set = "quick"
+datasets = ["ft06"]
 ```
 
 Command-line options override TOML values. `release_tag` qualifies only the
@@ -326,7 +364,7 @@ cargo install sqlx-cli --no-default-features --features postgres
 Save a benchmark run to PostgreSQL while still writing the normal CSV:
 
 ```sh
-PYTHONPATH=src:list-variable/cvrp/src:scalar-variable/employee-scheduling/src \
+PYTHONPATH=src:list-variable/cvrp/src:scalar-variable/employee-scheduling/src:scalar-variable/job-shop-scheduling/src \
   .venv/bin/python3 scripts/run_benchmark.py cvrp \
     --run-kind quick \
     --num-instances 3 \
@@ -353,14 +391,16 @@ make bench-cvrp-quick
 make bench-cvrp-quick-db
 make bench-employee-scheduling-quick
 make bench-employee-scheduling-quick-db
+make bench-job-shop-scheduling-quick
+make bench-job-shop-scheduling-quick-db
 make bench-cvrp-db BENCH_ARGS="--run-kind tag --release-tag v0.14.1"
 make bench-cvrp-db BENCH_ARGS="--run-kind quick --nightly"
 make bench-nightly-db
 ```
 
-`make bench-nightly-db` is the cron entrypoint. It builds both benchmark stacks,
+`make bench-nightly-db` is the cron entrypoint. It builds all benchmark stacks,
 applies migrations once, then calls `scripts/run_benchmark.py` directly for
-CVRP and employee scheduling. By default it uses
+CVRP, employee scheduling, and job-shop scheduling. By default it uses
 `benchmark.nightly.example.toml`; set `BENCH_CONFIG` for a different nightly
 config, or append explicit child harness overrides with `NIGHTLY_ARGS`. It does
 not pass `--solver`, so each benchmark uses its full default solver set.
@@ -369,7 +409,9 @@ not pass `--solver`, so each benchmark uses its full default solver set.
 
 Benchmark runs now write one global snake_case CSV schema directly. Native
 problem fields are stable optional columns, for example `nurses`, `weeks`,
-`validator_model_delta`, and `score_drift`.
+`validator_model_delta`, `score_drift`, `num_jobs`, `num_machines`,
+`num_operations`, `source_family`, `known_best_makespan`, and
+`makespan_gap_to_best`.
 
 PostgreSQL stores run-level catalog data in `benchmark_runs`, one solver-version
 row per solver involved in the run in `benchmark_solver_versions`, and one row
@@ -413,5 +455,7 @@ overshoot_seconds, overshoot_ratio, wall_time_over_limit,
 watchdog_limit_seconds, watchdog_killed, run_error, solver_stdout_path,
 solver_stderr_path, hard_feasible, cost, reported_cost, fresh_cost,
 reference_cost, quality_ratio, validation_error, solution_artifact, nurses,
-weeks, validator_model_delta, score_drift, source_file
+weeks, validator_model_delta, score_drift, num_jobs, num_machines,
+num_operations, source_family, known_best_makespan, makespan_gap_to_best,
+source_file
 ```
diff --git a/docs_jssp_proposal.md b/docs_jssp_proposal.md
index 7b15ab8..3597ce2 100644
--- a/docs_jssp_proposal.md
+++ b/docs_jssp_proposal.md
@@ -1,35 +1,42 @@
-# Proposal: Add a Job-Shop Scheduling benchmark (JSSP)
+# Job-Shop Scheduling benchmark (JSSP)
 
-## Why this fills the benchmark gap
+## Why this benchmark exists
 
-Current benchmark surface:
+Current benchmark surface in this branch:
 
 - CVRP (list-variable routing)
 - INRC2 nurse rostering (scalar-variable assignment/scheduling)
+- JSPLIB job-shop scheduling (scalar-variable machine scheduling)
 
-Missing surface:
-
-- Machine scheduling with precedence + disjunctive machine capacity.
-
-A JSSP benchmark adds a third core optimization class while preserving the same shared harness shape already used in this repository: deterministic dataset loader, solver adapters, shared run matrix, shared timing/watchdog policy, shared CSV/postgres logging.
+The JSSP benchmark adds a third core optimization class while preserving the
+same shared harness shape already used in this repository: deterministic
+dataset loader, solver adapters, shared run matrix, shared timing/watchdog
+policy, shared CSV/PostgreSQL logging, and shared result rows.
 
 ## Dataset selection
 
-Use the public benchmark ecosystem around JSPLIB / OR-Library classic JSSP instances.
+Use the public benchmark ecosystem around JSPLIB / OR-Library classic JSSP
+instances.
 
 Primary sources:
 
 - JSPLIB benchmark catalog: <https://scheduleopt.github.io/benchmarks/jsplib/>
 - OR-Library job-shop instances: <https://people.brunel.ac.uk/~mastjjb/jeb/orlib/jobshopinfo.html>
 
-Suggested bundled families:
+Bundled instances in this branch:
+
+- `ft06` from the FT family, known best makespan `55`
+- `la01` from the LA family, known best makespan `666`
+- `la02` from the LA family, known best makespan `655`
+
+The manifest currently defines:
 
-- Small/medium classics for quick runs: FT, LA, ORB, ABZ, YN
-- Larger stress set for candidate/nightly: TA (Taillard)
+- `quick`: `ft06`, `la01`
+- `canonical`: `ft06`, `la01`, `la02`
 
 ## Repository layout
 
-Add a new problem package following the existing pattern:
+The problem package follows the existing benchmark pattern:
 
 - `scalar-variable/job-shop-scheduling/`
   - `src/job_shop_bench/__init__.py`
@@ -37,12 +44,15 @@ Add a new problem package following the existing pattern:
   - `src/job_shop_bench/loader.py`
   - `src/job_shop_bench/domain/models.py`
   - `src/job_shop_bench/validation.py`
-  - `src/job_shop_bench/solver/solver.py` (adapter protocol)
+  - `src/job_shop_bench/solver/instance_json.py`
+  - `src/job_shop_bench/solver/solver.py` (adapter registry)
   - `src/job_shop_bench/solver/solverforge.py`
-  - `src/job_shop_bench/solver/ortools.py` (optional parity baseline)
+  - `src/job_shop_bench/solver/solverforge_jssp/`
+  - `src/job_shop_bench/solver/ortools/`
+  - `src/job_shop_bench/solver/timefold.py`
+  - `src/job_shop_bench/solver/timefold/`
   - `data/jsplib/...` (instance files + manifest)
   - `scripts/validate_all.py`
-  - `Makefile`
 
 The benchmark framework remains centralized in `src/solverforge_bench/`.
 
@@ -57,7 +67,7 @@ Use a canonical JSSP definition:
   - No overlap for operations sharing a machine
 - Objective: minimize makespan
 
-Recommended instance model:
+Current instance model:
 
 ```python
 @dataclass(frozen=True)
@@ -70,56 +80,69 @@ class Operation:
 @dataclass(frozen=True)
 class JobShopInstance:
     name: str
+    family: str
     num_jobs: int
     num_machines: int
     operations_by_job: tuple[tuple[Operation, ...], ...]
-    source_family: str
 ```
 
 ## Solver output contract
 
 Standardize solver return payload so validation is strict and comparable:
 
-- Per-operation start times (or equivalent machine sequences convertible to starts)
-- Optional solver-native metadata (`best_bound`, `search_nodes`, `status_text`)
+- Per-operation start times for every operation.
+- `reported_makespan`, which is compared against a fresh Python validator value.
+- No missing operation and no unassigned start may be fabricated into a valid
+  schedule.
 
 A validated schedule must produce:
 
-- `feasible = True/False`
-- `objective_value` = makespan when feasible
-- `violation` string when infeasible/invalid
+- `hard_feasible = True/False`
+- `cost` = validator-computed makespan when feasible
+- `reported_cost` = solver-reported makespan when present
+- `validation_error` when infeasible/invalid
+
+## Solver adapters
+
+Registered job-shop scheduling solvers are:
+
+- `solverforge`: Rust/PyO3 SolverForge model in `solver/solverforge_jssp/`.
+  It uses scalar operation start-time variables, hard constraints for assigned
+  starts, job precedence, and machine non-overlap, and a soft objective that
+  minimizes makespan.
+- `timefold`: Java Timefold model in `solver/timefold/`, packaged as
+  `timefold-jssp.jar`.
+- `ortools`: native C++ OR-Tools CP-SAT model in `solver/ortools/`.
+
+The deterministic dispatch schedule is only used inside SolverForge and
+Timefold as an initial seed. It is not a registered benchmark solver.
 
 ## Native result fields
 
-Add benchmark-native columns similar to existing adapters:
+The benchmark exposes native columns similar to existing adapters:
 
 - `num_jobs`
 - `num_machines`
 - `num_operations`
-- `source_family` (ft/la/orb/abz/yn/ta)
+- `source_family` (for example `ft` or `la` in the current manifest)
 - `known_best_makespan` (if available in manifest)
 - `makespan_gap_to_best` (if known best present)
 
-These should be produced by the adapter and passed to the shared framework row writer.
+These are produced by the job-shop benchmark spec and passed to the shared
+framework row writer.
 
 ## Manifests and run groups
 
-Create `data/jsplib/manifest.json` with deterministic groups:
-
-- `quick`: ~6 instances across multiple families (fast smoke)
-- `canonical`: balanced medium set
-- `stress`: larger TA-heavy set
-
-Example quick candidates:
-
-- `ft06`, `ft10`, `la16`, `orb04`, `abz6`, `ta20`
+`data/jsplib/manifest.json` owns deterministic groups and known-best metadata.
+The current manifest intentionally stays small for this PR: two quick smoke
+instances and three canonical instances.
 
 ## CLI and config integration
 
-Integrate with root harness without changing shared policy:
+The root harness integration does not change shared policy:
 
-- Add benchmark id: `job-shop-scheduling`
-- Add benchmark-specific selector options in the adapter layer only:
+- Benchmark id: `job-shop-scheduling`
+- Benchmark-specific selector options in the adapter layer only:
   - `--dataset-set`
   - `--datasets`
 
@@ -130,21 +153,26 @@ benchmark = "job-shop-scheduling"
 
 [benchmarks.job-shop-scheduling]
 dataset_set = "quick"
-datasets = ["ft06", "la16"]
+datasets = ["ft06"]
 ```
 
 ## Make targets
 
-Add root targets mirroring existing conventions:
+Root targets mirror existing conventions:
 
 - `make validate-job-shop-scheduling`
+- `make build-job-shop-scheduling`
+- `make build-job-shop-scheduling-solverforge`
+- `make build-job-shop-scheduling-timefold`
+- `make build-job-shop-scheduling-ortools`
 - `make bench-job-shop-scheduling-quick`
-- `make bench-job-shop-scheduling`
 - `make bench-job-shop-scheduling-quick-db`
+- `make bench-job-shop-scheduling`
+- `make bench-job-shop-scheduling-db`
 
 ## Validation logic
 
-`validation.py` should verify:
+`validation.py` verifies:
 
 1. Every operation appears exactly once.
 2. Start times are non-negative.
@@ -154,25 +182,12 @@ Add root targets mirroring existing conventions:
 
 Return deterministic error messages so solver failures are distinguishable from loader/adapter bugs.
 
-## Implementation phases
-
-1. **Phase 1: skeleton + parser + validator**
-   - Loader for selected JSPLIB format
-   - Strict validation + makespan evaluation
-   - One solver adapter (SolverForge)
-2. **Phase 2: harness registration + TOML/CLI plumbing**
-   - Add benchmark spec to registry
-   - Add quick/canonical groups and make targets
-3. **Phase 3: baseline parity + reporting polish**
-   - Optional OR-Tools baseline adapter
-   - Known-best manifest enrichment
-   - Gap metrics in summaries
-
 ## Smoke-test commands
 
 - `make validate-job-shop-scheduling`
 - `make bench-job-shop-scheduling-quick`
-- `PYTHONPATH=src:list-variable/cvrp/src:scalar-variable/employee-scheduling/src:scalar-variable/job-shop-scheduling/src .venv/bin/python3 scripts/run_benchmark.py job-shop-scheduling --run-kind quick --datasets ft06 la16 --time-limits 1 10`
+- `PYTHONPATH=src:list-variable/cvrp/src:scalar-variable/employee-scheduling/src:scalar-variable/job-shop-scheduling/src .venv/bin/python3 scripts/run_benchmark.py job-shop-scheduling --run-kind quick --dataset-set quick --solver solverforge --time-limits 1`
+- `PYTHONPATH=src:list-variable/cvrp/src:scalar-variable/employee-scheduling/src:scalar-variable/job-shop-scheduling/src .venv/bin/python3 scripts/run_benchmark.py job-shop-scheduling --run-kind quick --dataset-set quick --time-limits 1 10`
 
 ## Risks and mitigations
 
@@ -180,6 +195,8 @@ Return deterministic error messages so solver failures are distinguishable from
 - **Objective comparability**: make makespan the only scored objective for now.
 - **Solver-output shape differences**: adapt all solver outputs into one canonical schedule payload before validation.
 
-## Recommendation
+## Current status
 
-Proceed with JSSP as the third benchmark family. It is problem-class specific, publicly benchmarked, scalable from quick to nightly, and fits the same shared harness architecture already used by this repository.
+JSSP is implemented as the third benchmark family in this branch. It is
+problem-class specific, publicly benchmarked, scalable from quick to nightly,
+and fits the same shared harness architecture already used by this repository.

From a037ebe3912e33a057875a1b08dd665f26a322ff Mon Sep 17 00:00:00 2001
From: Vittorio Distefano <info@vdistefano.studio>
Date: Sun, 17 May 2026 20:14:50 +0200
Subject: [PATCH 12/29] fix(job-shop): preserve native fields in normalization

Add the Job-Shop Scheduling native result columns to the shared global CSV schema and parse them in scripts/normalize_results.py.

The benchmark already documents and emits num_jobs, num_machines, num_operations, source_family, known_best_makespan, and makespan_gap_to_best. Without carrying those columns through normalization, make normalize-results silently drops the metadata from file-based artifacts.

Keep the CSV writer schema and normalization schema paired so the documented normalized output remains faithful to the benchmark rows produced by the shared harness.
---
 scripts/normalize_results.py | 6 ++++++
 src/solverforge_bench/csv.py | 6 ++++++
 2 files changed, 12 insertions(+)

diff --git a/scripts/normalize_results.py b/scripts/normalize_results.py
index 54f578e..6c01dce 100755
--- a/scripts/normalize_results.py
+++ b/scripts/normalize_results.py
@@ -111,6 +111,12 @@ def normalize_global_row(
         "weeks": as_int(row.get("weeks")),
         "validator_model_delta": as_float(row.get("validator_model_delta")),
         "score_drift": as_bool(row.get("score_drift")),
+        "num_jobs": as_int(row.get("num_jobs")),
+        "num_machines": as_int(row.get("num_machines")),
+        "num_operations": as_int(row.get("num_operations")),
+        "source_family": blank_to_none(row.get("source_family")),
+        "known_best_makespan": as_int(row.get("known_best_makespan")),
+        "makespan_gap_to_best": as_float(row.get("makespan_gap_to_best")),
         "source_file": str(source_file),
     }
 
diff --git a/src/solverforge_bench/csv.py b/src/solverforge_bench/csv.py
index 2703ddb..09b60fa 100644
--- a/src/solverforge_bench/csv.py
+++ b/src/solverforge_bench/csv.py
@@ -38,6 +38,12 @@
     "weeks",
     "validator_model_delta",
     "score_drift",
+    "num_jobs",
+    "num_machines",
+    "num_operations",
+    "source_family",
+    "known_best_makespan",
+    "makespan_gap_to_best",
 ]
 
 NORMALIZED_COLUMNS = ["run_id", *GLOBAL_COLUMNS, "source_file"]

From 7ca74ef9a2eff913cff70a2bab38a377eac9ff79 Mon Sep 17 00:00:00 2001
From: Vittorio Distefano <info@vdistefano.studio>
Date: Sun, 17 May 2026 21:46:13 +0200
Subject: [PATCH 13/29] fix(make): wire job-shop benchmark wrappers

Add the missing job-shop benchmark directory Makefile so launching from scalar-variable/job-shop-scheduling mirrors the existing CVRP and employee-scheduling workflows.

Expose SolverForge-only job-shop benchmark targets at the root Makefile so the new wrapper can delegate bench-solverforge and bench-solverforge-quick without missing-rule failures.

Validated with make -C scalar-variable/job-shop-scheduling validate and make -C scalar-variable/job-shop-scheduling bench-solverforge-quick.
---
 Makefile                                     | 14 ++++++++
 scalar-variable/job-shop-scheduling/Makefile | 34 ++++++++++++++++++++
 2 files changed, 48 insertions(+)
 create mode 100644 scalar-variable/job-shop-scheduling/Makefile

diff --git a/Makefile b/Makefile
index 6f0015c..14d71d1 100644
--- a/Makefile
+++ b/Makefile
@@ -76,6 +76,8 @@ MAVEN_ENV := JAVA_HOME="$(JAVA_HOME_FOR_MAVEN)" PATH="$(JAVA_HOME_FOR_MAVEN)/bin
 	bench-employee-scheduling-solverforge-quick bench-employee-scheduling-solverforge-quick-db \
 	bench-job-shop-scheduling bench-job-shop-scheduling-db \
 	bench-job-shop-scheduling-quick bench-job-shop-scheduling-quick-db \
+	bench-job-shop-scheduling-solverforge bench-job-shop-scheduling-solverforge-db \
+	bench-job-shop-scheduling-solverforge-quick bench-job-shop-scheduling-solverforge-quick-db \
 	bench-nightly-db \
 	validate-cvrp validate-employee-scheduling validate-employee-model-parity validate-job-shop-scheduling \
 	db-check db-create db-migrate db-reset normalize-results
@@ -266,5 +268,17 @@ bench-job-shop-scheduling-quick: build-job-shop-scheduling
 bench-job-shop-scheduling-quick-db: build-job-shop-scheduling db-migrate
 	$(PINNED_BENCH) "$(PYTHON)" scripts/run_benchmark.py job-shop-scheduling $(BENCH_CONFIG_ARG) --run-kind quick --dataset-set quick --time-limits 1 10 $(BENCH_DB_ARGS) $(BENCH_ARGS)
 
+bench-job-shop-scheduling-solverforge: build-job-shop-scheduling-solverforge
+	$(PINNED_BENCH) "$(PYTHON)" scripts/run_benchmark.py job-shop-scheduling $(BENCH_CONFIG_ARG) --solver solverforge --dataset-set canonical --time-limits 1 10 60 $(BENCH_ARGS)
+
+bench-job-shop-scheduling-solverforge-db: build-job-shop-scheduling-solverforge db-migrate
+	$(PINNED_BENCH) "$(PYTHON)" scripts/run_benchmark.py job-shop-scheduling $(BENCH_CONFIG_ARG) --solver solverforge --dataset-set canonical --time-limits 1 10 60 $(BENCH_DB_ARGS) $(BENCH_ARGS)
+
+bench-job-shop-scheduling-solverforge-quick: build-job-shop-scheduling-solverforge
+	$(PINNED_BENCH) "$(PYTHON)" scripts/run_benchmark.py job-shop-scheduling $(BENCH_CONFIG_ARG) --run-kind quick --solver solverforge --dataset-set quick --time-limits 1 10 $(BENCH_ARGS)
+
+bench-job-shop-scheduling-solverforge-quick-db: build-job-shop-scheduling-solverforge db-migrate
+	$(PINNED_BENCH) "$(PYTHON)" scripts/run_benchmark.py job-shop-scheduling $(BENCH_CONFIG_ARG) --run-kind quick --solver solverforge --dataset-set quick --time-limits 1 10 $(BENCH_DB_ARGS) $(BENCH_ARGS)
+
 validate-job-shop-scheduling: banner
 	cd $(JOBSHOP_ROOT) && PYTHONPATH=../../src:src "$(PYTHON)" scripts/validate_all.py
diff --git a/scalar-variable/job-shop-scheduling/Makefile b/scalar-variable/job-shop-scheduling/Makefile
new file mode 100644
index 0000000..ce68e60
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/Makefile
@@ -0,0 +1,34 @@
+ROOT := ../..
+PYTHON ?= $(abspath $(ROOT))/.venv/bin/python3
+
+.PHONY: build build-solverforge build-timefold build-ortools bench bench-quick bench-solverforge bench-solverforge-quick validate full
+
+build:
+	$(MAKE) -C $(ROOT) build-job-shop-scheduling PYTHON=$(PYTHON)
+
+build-timefold:
+	$(MAKE) -C $(ROOT) build-job-shop-scheduling-timefold
+
+build-ortools:
+	$(MAKE) -C $(ROOT) build-job-shop-scheduling-ortools
+
+build-solverforge:
+	$(MAKE) -C $(ROOT) build-job-shop-scheduling-solverforge PYTHON=$(PYTHON)
+
+bench:
+	$(MAKE) -C $(ROOT) bench-job-shop-scheduling PYTHON=$(PYTHON)
+
+bench-quick:
+	$(MAKE) -C $(ROOT) bench-job-shop-scheduling-quick PYTHON=$(PYTHON)
+
+bench-solverforge:
+	$(MAKE) -C $(ROOT) bench-job-shop-scheduling-solverforge PYTHON=$(PYTHON)
+
+bench-solverforge-quick:
+	$(MAKE) -C $(ROOT) bench-job-shop-scheduling-solverforge-quick PYTHON=$(PYTHON)
+
+validate:
+	$(MAKE) -C $(ROOT) validate-job-shop-scheduling PYTHON=$(PYTHON)
+
+full:
+	$(MAKE) -C $(ROOT) bench-job-shop-scheduling PYTHON=$(PYTHON)

From 930c92e3bcf56f16e1a084b379e1d2b582b8272a Mon Sep 17 00:00:00 2001
From: Vittorio Distefano <info@vdistefano.studio>
Date: Thu, 21 May 2026 14:55:49 +0200
Subject: [PATCH 14/29] chore(job-shop): align benchmark artifact policy

Treat job-shop scheduling benchmark outputs as the same generated evidence artifacts already produced by CVRP and employee scheduling. The documented job-shop benchmark targets write timestamped CSV files and optional artifact directories under the benchmark data directory, so those generated outputs should not appear as untracked source changes after normal runs.
---
 .gitignore | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/.gitignore b/.gitignore
index ecfdab6..0a5a09b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -25,3 +25,5 @@ list-variable/cvrp/data/benchmark*.csv
 list-variable/cvrp/data/artifacts/
 scalar-variable/employee-scheduling/data/benchmark*.csv
 scalar-variable/employee-scheduling/data/artifacts/
+scalar-variable/job-shop-scheduling/data/benchmark*.csv
+scalar-variable/job-shop-scheduling/data/artifacts/

From 074bc2711e303ee44fb80bc132b9c5a76d8c3c24 Mon Sep 17 00:00:00 2001
From: Vittorio Distefano <info@vdistefano.studio>
Date: Thu, 21 May 2026 15:54:59 +0200
Subject: [PATCH 15/29] fix(make): expose job-shop database wrappers

Add thin nested Makefile targets for the job-shop scheduling PostgreSQL benchmark paths. The root Makefile already provides full, quick, SolverForge-only, and SolverForge quick database targets; the job-shop subdirectory now delegates to those same canonical targets so local make usage covers the database-backed outputs as well.
---
 scalar-variable/job-shop-scheduling/Makefile | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/scalar-variable/job-shop-scheduling/Makefile b/scalar-variable/job-shop-scheduling/Makefile
index ce68e60..f493ee5 100644
--- a/scalar-variable/job-shop-scheduling/Makefile
+++ b/scalar-variable/job-shop-scheduling/Makefile
@@ -1,7 +1,7 @@
 ROOT := ../..
 PYTHON ?= $(abspath $(ROOT))/.venv/bin/python3
 
-.PHONY: build build-solverforge build-timefold build-ortools bench bench-quick bench-solverforge bench-solverforge-quick validate full
+.PHONY: build build-solverforge build-timefold build-ortools bench bench-db bench-quick bench-quick-db bench-solverforge bench-solverforge-db bench-solverforge-quick bench-solverforge-quick-db validate full full-db
 
 build:
 	$(MAKE) -C $(ROOT) build-job-shop-scheduling PYTHON=$(PYTHON)
@@ -18,17 +18,32 @@ build-solverforge:
 bench:
 	$(MAKE) -C $(ROOT) bench-job-shop-scheduling PYTHON=$(PYTHON)
 
+bench-db:
+	$(MAKE) -C $(ROOT) bench-job-shop-scheduling-db PYTHON=$(PYTHON)
+
 bench-quick:
 	$(MAKE) -C $(ROOT) bench-job-shop-scheduling-quick PYTHON=$(PYTHON)
 
+bench-quick-db:
+	$(MAKE) -C $(ROOT) bench-job-shop-scheduling-quick-db PYTHON=$(PYTHON)
+
 bench-solverforge:
 	$(MAKE) -C $(ROOT) bench-job-shop-scheduling-solverforge PYTHON=$(PYTHON)
 
+bench-solverforge-db:
+	$(MAKE) -C $(ROOT) bench-job-shop-scheduling-solverforge-db PYTHON=$(PYTHON)
+
 bench-solverforge-quick:
 	$(MAKE) -C $(ROOT) bench-job-shop-scheduling-solverforge-quick PYTHON=$(PYTHON)
 
+bench-solverforge-quick-db:
+	$(MAKE) -C $(ROOT) bench-job-shop-scheduling-solverforge-quick-db PYTHON=$(PYTHON)
+
 validate:
 	$(MAKE) -C $(ROOT) validate-job-shop-scheduling PYTHON=$(PYTHON)
 
 full:
 	$(MAKE) -C $(ROOT) bench-job-shop-scheduling PYTHON=$(PYTHON)
+
+full-db:
+	$(MAKE) -C $(ROOT) bench-job-shop-scheduling-db PYTHON=$(PYTHON)

From dc98c6ea9195787241d2657a08f6f6b613a5ed82 Mon Sep 17 00:00:00 2001
From: Vittorio Distefano <info@vdistefano.studio>
Date: Sat, 23 May 2026 15:39:30 +0200
Subject: [PATCH 16/29] feat(job-shop): bundle canonical JSPLIB corpus

Replace the three-instance sample manifest with the bundled classic JSPLIB corpus so the job-shop benchmark can run the canonical offline dataset directly.

Record upstream source metadata plus known optimum, lower-bound, and upper-bound makespan values in the manifest. Normalize the bundled text fixtures to their upstream JSPLIB form without changing active solver behavior.
---
 .../job-shop-scheduling/data/jsplib/abz5.txt  |   15 +
 .../job-shop-scheduling/data/jsplib/abz6.txt  |   15 +
 .../job-shop-scheduling/data/jsplib/abz7.txt  |   25 +
 .../job-shop-scheduling/data/jsplib/abz8.txt  |   25 +
 .../job-shop-scheduling/data/jsplib/abz9.txt  |   25 +
 .../job-shop-scheduling/data/jsplib/ft06.txt  |   16 +-
 .../job-shop-scheduling/data/jsplib/ft10.txt  |   15 +
 .../job-shop-scheduling/data/jsplib/ft20.txt  |   25 +
 .../job-shop-scheduling/data/jsplib/la01.txt  |    4 +
 .../job-shop-scheduling/data/jsplib/la02.txt  |   22 +-
 .../job-shop-scheduling/data/jsplib/la03.txt  |   15 +
 .../job-shop-scheduling/data/jsplib/la04.txt  |   15 +
 .../job-shop-scheduling/data/jsplib/la05.txt  |   15 +
 .../job-shop-scheduling/data/jsplib/la06.txt  |   20 +
 .../job-shop-scheduling/data/jsplib/la07.txt  |   20 +
 .../job-shop-scheduling/data/jsplib/la08.txt  |   20 +
 .../job-shop-scheduling/data/jsplib/la09.txt  |   20 +
 .../job-shop-scheduling/data/jsplib/la10.txt  |   20 +
 .../job-shop-scheduling/data/jsplib/la11.txt  |   25 +
 .../job-shop-scheduling/data/jsplib/la12.txt  |   25 +
 .../job-shop-scheduling/data/jsplib/la13.txt  |   25 +
 .../job-shop-scheduling/data/jsplib/la14.txt  |   25 +
 .../job-shop-scheduling/data/jsplib/la15.txt  |   25 +
 .../job-shop-scheduling/data/jsplib/la16.txt  |   15 +
 .../job-shop-scheduling/data/jsplib/la17.txt  |   15 +
 .../job-shop-scheduling/data/jsplib/la18.txt  |   15 +
 .../job-shop-scheduling/data/jsplib/la19.txt  |   15 +
 .../job-shop-scheduling/data/jsplib/la20.txt  |   15 +
 .../job-shop-scheduling/data/jsplib/la21.txt  |   20 +
 .../job-shop-scheduling/data/jsplib/la22.txt  |   20 +
 .../job-shop-scheduling/data/jsplib/la23.txt  |   20 +
 .../job-shop-scheduling/data/jsplib/la24.txt  |   20 +
 .../job-shop-scheduling/data/jsplib/la25.txt  |   20 +
 .../job-shop-scheduling/data/jsplib/la26.txt  |   25 +
 .../job-shop-scheduling/data/jsplib/la27.txt  |   25 +
 .../job-shop-scheduling/data/jsplib/la28.txt  |   25 +
 .../job-shop-scheduling/data/jsplib/la29.txt  |   25 +
 .../job-shop-scheduling/data/jsplib/la30.txt  |   25 +
 .../job-shop-scheduling/data/jsplib/la31.txt  |   35 +
 .../job-shop-scheduling/data/jsplib/la32.txt  |   35 +
 .../job-shop-scheduling/data/jsplib/la33.txt  |   35 +
 .../job-shop-scheduling/data/jsplib/la34.txt  |   35 +
 .../job-shop-scheduling/data/jsplib/la35.txt  |   35 +
 .../job-shop-scheduling/data/jsplib/la36.txt  |   20 +
 .../job-shop-scheduling/data/jsplib/la37.txt  |   20 +
 .../job-shop-scheduling/data/jsplib/la38.txt  |   20 +
 .../job-shop-scheduling/data/jsplib/la39.txt  |   20 +
 .../job-shop-scheduling/data/jsplib/la40.txt  |   20 +
 .../data/jsplib/manifest.json                 | 1248 ++++++++++++++++-
 .../job-shop-scheduling/data/jsplib/orb01.txt |   15 +
 .../job-shop-scheduling/data/jsplib/orb02.txt |   15 +
 .../job-shop-scheduling/data/jsplib/orb03.txt |   15 +
 .../job-shop-scheduling/data/jsplib/orb04.txt |   15 +
 .../job-shop-scheduling/data/jsplib/orb05.txt |   15 +
 .../job-shop-scheduling/data/jsplib/orb06.txt |   15 +
 .../job-shop-scheduling/data/jsplib/orb07.txt |   15 +
 .../job-shop-scheduling/data/jsplib/orb08.txt |   15 +
 .../job-shop-scheduling/data/jsplib/orb09.txt |   15 +
 .../job-shop-scheduling/data/jsplib/orb10.txt |   15 +
 .../job-shop-scheduling/data/jsplib/swv01.txt |   25 +
 .../job-shop-scheduling/data/jsplib/swv02.txt |   25 +
 .../job-shop-scheduling/data/jsplib/swv03.txt |   25 +
 .../job-shop-scheduling/data/jsplib/swv04.txt |   25 +
 .../job-shop-scheduling/data/jsplib/swv05.txt |   25 +
 .../job-shop-scheduling/data/jsplib/swv06.txt |   25 +
 .../job-shop-scheduling/data/jsplib/swv07.txt |   25 +
 .../job-shop-scheduling/data/jsplib/swv08.txt |   25 +
 .../job-shop-scheduling/data/jsplib/swv09.txt |   25 +
 .../job-shop-scheduling/data/jsplib/swv10.txt |   25 +
 .../job-shop-scheduling/data/jsplib/swv11.txt |   55 +
 .../job-shop-scheduling/data/jsplib/swv12.txt |   55 +
 .../job-shop-scheduling/data/jsplib/swv13.txt |   55 +
 .../job-shop-scheduling/data/jsplib/swv14.txt |   55 +
 .../job-shop-scheduling/data/jsplib/swv15.txt |   55 +
 .../job-shop-scheduling/data/jsplib/swv16.txt |   55 +
 .../job-shop-scheduling/data/jsplib/swv17.txt |   55 +
 .../job-shop-scheduling/data/jsplib/swv18.txt |   55 +
 .../job-shop-scheduling/data/jsplib/swv19.txt |   55 +
 .../job-shop-scheduling/data/jsplib/swv20.txt |   55 +
 .../job-shop-scheduling/data/jsplib/ta01.txt  |   16 +
 .../job-shop-scheduling/data/jsplib/ta02.txt  |   16 +
 .../job-shop-scheduling/data/jsplib/ta03.txt  |   16 +
 .../job-shop-scheduling/data/jsplib/ta04.txt  |   16 +
 .../job-shop-scheduling/data/jsplib/ta05.txt  |   16 +
 .../job-shop-scheduling/data/jsplib/ta06.txt  |   16 +
 .../job-shop-scheduling/data/jsplib/ta07.txt  |   16 +
 .../job-shop-scheduling/data/jsplib/ta08.txt  |   16 +
 .../job-shop-scheduling/data/jsplib/ta09.txt  |   16 +
 .../job-shop-scheduling/data/jsplib/ta10.txt  |   16 +
 .../job-shop-scheduling/data/jsplib/ta11.txt  |   21 +
 .../job-shop-scheduling/data/jsplib/ta12.txt  |   21 +
 .../job-shop-scheduling/data/jsplib/ta13.txt  |   21 +
 .../job-shop-scheduling/data/jsplib/ta14.txt  |   21 +
 .../job-shop-scheduling/data/jsplib/ta15.txt  |   21 +
 .../job-shop-scheduling/data/jsplib/ta16.txt  |   21 +
 .../job-shop-scheduling/data/jsplib/ta17.txt  |   21 +
 .../job-shop-scheduling/data/jsplib/ta18.txt  |   21 +
 .../job-shop-scheduling/data/jsplib/ta19.txt  |   21 +
 .../job-shop-scheduling/data/jsplib/ta20.txt  |   21 +
 .../job-shop-scheduling/data/jsplib/ta21.txt  |   21 +
 .../job-shop-scheduling/data/jsplib/ta22.txt  |   21 +
 .../job-shop-scheduling/data/jsplib/ta23.txt  |   21 +
 .../job-shop-scheduling/data/jsplib/ta24.txt  |   21 +
 .../job-shop-scheduling/data/jsplib/ta25.txt  |   21 +
 .../job-shop-scheduling/data/jsplib/ta26.txt  |   21 +
 .../job-shop-scheduling/data/jsplib/ta27.txt  |   21 +
 .../job-shop-scheduling/data/jsplib/ta28.txt  |   21 +
 .../job-shop-scheduling/data/jsplib/ta29.txt  |   21 +
 .../job-shop-scheduling/data/jsplib/ta30.txt  |   21 +
 .../job-shop-scheduling/data/jsplib/ta31.txt  |   31 +
 .../job-shop-scheduling/data/jsplib/ta32.txt  |   31 +
 .../job-shop-scheduling/data/jsplib/ta33.txt  |   31 +
 .../job-shop-scheduling/data/jsplib/ta34.txt  |   31 +
 .../job-shop-scheduling/data/jsplib/ta35.txt  |   31 +
 .../job-shop-scheduling/data/jsplib/ta36.txt  |   31 +
 .../job-shop-scheduling/data/jsplib/ta37.txt  |   31 +
 .../job-shop-scheduling/data/jsplib/ta38.txt  |   31 +
 .../job-shop-scheduling/data/jsplib/ta39.txt  |   31 +
 .../job-shop-scheduling/data/jsplib/ta40.txt  |   31 +
 .../job-shop-scheduling/data/jsplib/ta41.txt  |   31 +
 .../job-shop-scheduling/data/jsplib/ta42.txt  |   31 +
 .../job-shop-scheduling/data/jsplib/ta43.txt  |   31 +
 .../job-shop-scheduling/data/jsplib/ta44.txt  |   31 +
 .../job-shop-scheduling/data/jsplib/ta45.txt  |   31 +
 .../job-shop-scheduling/data/jsplib/ta46.txt  |   31 +
 .../job-shop-scheduling/data/jsplib/ta47.txt  |   31 +
 .../job-shop-scheduling/data/jsplib/ta48.txt  |   31 +
 .../job-shop-scheduling/data/jsplib/ta49.txt  |   31 +
 .../job-shop-scheduling/data/jsplib/ta50.txt  |   31 +
 .../job-shop-scheduling/data/jsplib/ta51.txt  |   51 +
 .../job-shop-scheduling/data/jsplib/ta52.txt  |   51 +
 .../job-shop-scheduling/data/jsplib/ta53.txt  |   51 +
 .../job-shop-scheduling/data/jsplib/ta54.txt  |   51 +
 .../job-shop-scheduling/data/jsplib/ta55.txt  |   51 +
 .../job-shop-scheduling/data/jsplib/ta56.txt  |   51 +
 .../job-shop-scheduling/data/jsplib/ta57.txt  |   51 +
 .../job-shop-scheduling/data/jsplib/ta58.txt  |   51 +
 .../job-shop-scheduling/data/jsplib/ta59.txt  |   51 +
 .../job-shop-scheduling/data/jsplib/ta60.txt  |   51 +
 .../job-shop-scheduling/data/jsplib/ta61.txt  |   51 +
 .../job-shop-scheduling/data/jsplib/ta62.txt  |   51 +
 .../job-shop-scheduling/data/jsplib/ta63.txt  |   51 +
 .../job-shop-scheduling/data/jsplib/ta64.txt  |   51 +
 .../job-shop-scheduling/data/jsplib/ta65.txt  |   51 +
 .../job-shop-scheduling/data/jsplib/ta66.txt  |   51 +
 .../job-shop-scheduling/data/jsplib/ta67.txt  |   51 +
 .../job-shop-scheduling/data/jsplib/ta68.txt  |   51 +
 .../job-shop-scheduling/data/jsplib/ta69.txt  |   51 +
 .../job-shop-scheduling/data/jsplib/ta70.txt  |   51 +
 .../job-shop-scheduling/data/jsplib/ta71.txt  |  101 ++
 .../job-shop-scheduling/data/jsplib/ta72.txt  |  101 ++
 .../job-shop-scheduling/data/jsplib/ta73.txt  |  101 ++
 .../job-shop-scheduling/data/jsplib/ta74.txt  |  101 ++
 .../job-shop-scheduling/data/jsplib/ta75.txt  |  101 ++
 .../job-shop-scheduling/data/jsplib/ta76.txt  |  101 ++
 .../job-shop-scheduling/data/jsplib/ta77.txt  |  101 ++
 .../job-shop-scheduling/data/jsplib/ta78.txt  |  101 ++
 .../job-shop-scheduling/data/jsplib/ta79.txt  |  101 ++
 .../job-shop-scheduling/data/jsplib/ta80.txt  |  101 ++
 .../job-shop-scheduling/data/jsplib/yn1.txt   |   25 +
 .../job-shop-scheduling/data/jsplib/yn2.txt   |   25 +
 .../job-shop-scheduling/data/jsplib/yn3.txt   |   25 +
 .../job-shop-scheduling/data/jsplib/yn4.txt   |   25 +
 163 files changed, 6540 insertions(+), 20 deletions(-)
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/abz5.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/abz6.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/abz7.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/abz8.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/abz9.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ft10.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ft20.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/la03.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/la04.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/la05.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/la06.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/la07.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/la08.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/la09.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/la10.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/la11.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/la12.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/la13.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/la14.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/la15.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/la16.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/la17.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/la18.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/la19.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/la20.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/la21.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/la22.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/la23.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/la24.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/la25.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/la26.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/la27.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/la28.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/la29.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/la30.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/la31.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/la32.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/la33.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/la34.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/la35.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/la36.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/la37.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/la38.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/la39.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/la40.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/orb01.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/orb02.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/orb03.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/orb04.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/orb05.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/orb06.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/orb07.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/orb08.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/orb09.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/orb10.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/swv01.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/swv02.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/swv03.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/swv04.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/swv05.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/swv06.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/swv07.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/swv08.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/swv09.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/swv10.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/swv11.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/swv12.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/swv13.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/swv14.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/swv15.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/swv16.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/swv17.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/swv18.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/swv19.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/swv20.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta01.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta02.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta03.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta04.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta05.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta06.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta07.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta08.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta09.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta10.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta11.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta12.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta13.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta14.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta15.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta16.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta17.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta18.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta19.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta20.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta21.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta22.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta23.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta24.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta25.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta26.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta27.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta28.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta29.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta30.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta31.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta32.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta33.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta34.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta35.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta36.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta37.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta38.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta39.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta40.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta41.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta42.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta43.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta44.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta45.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta46.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta47.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta48.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta49.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta50.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta51.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta52.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta53.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta54.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta55.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta56.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta57.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta58.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta59.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta60.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta61.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta62.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta63.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta64.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta65.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta66.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta67.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta68.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta69.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta70.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta71.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta72.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta73.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta74.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta75.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta76.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta77.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta78.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta79.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/ta80.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/yn1.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/yn2.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/yn3.txt
 create mode 100644 scalar-variable/job-shop-scheduling/data/jsplib/yn4.txt

diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/abz5.txt b/scalar-variable/job-shop-scheduling/data/jsplib/abz5.txt
new file mode 100644
index 0000000..69e23de
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/abz5.txt
@@ -0,0 +1,15 @@
+#+++++++++++++++++++++++++++++
+# instance abz5
+#+++++++++++++++++++++++++++++
+# Adams, Balas, and Zawack 10x10 instance (Table 1, instance 5)
+10 10
+4 88 8 68 6 94 5 99 1 67 2 89 9 77 7 99 0 86 3 92
+5 72 3 50 6 69 4 75 2 94 8 66 0 92 1 82 7 94 9 63
+9 83 8 61 0 83 1 65 6 64 5 85 7 78 4 85 2 55 3 77
+7 94 2 68 1 61 4 99 3 54 6 75 5 66 0 76 9 63 8 67
+3 69 4 88 9 82 8 95 0 99 2 67 6 95 5 68 7 67 1 86
+1 99 4 81 5 64 6 66 8 80 2 80 7 69 9 62 3 79 0 88
+7 50 1 86 4 97 3 96 0 95 8 97 2 66 5 99 6 52 9 71
+4 98 6 73 3 82 2 51 1 71 5 94 7 85 0 62 8 95 9 79
+0 94 6 71 3 81 7 85 1 66 2 90 4 76 5 58 8 93 9 97
+3 50 0 59 1 82 8 67 7 56 9 96 6 58 4 81 5 59 2 96
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/abz6.txt b/scalar-variable/job-shop-scheduling/data/jsplib/abz6.txt
new file mode 100644
index 0000000..4584c75
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/abz6.txt
@@ -0,0 +1,15 @@
+#+++++++++++++++++++++++++++++
+# instance abz6
+#+++++++++++++++++++++++++++++
+# Adams, and Zawack 10x10 instance (Table 1, instance 6)
+10 10
+7 62 8 24 5 25 3 84 4 47 6 38 2 82 0 93 9 24 1 66
+5 47 2 97 8 92 9 22 1 93 4 29 7 56 3 80 0 78 6 67
+1 45 7 46 6 22 2 26 9 38 0 69 4 40 3 33 8 75 5 96
+4 85 8 76 5 68 9 88 3 36 6 75 2 56 1 35 0 77 7 85
+8 60 9 20 7 25 3 63 4 81 0 52 1 30 5 98 6 54 2 86
+3 87 9 73 5 51 2 95 4 65 1 86 6 22 8 58 0 80 7 65
+5 81 2 53 7 57 6 71 9 81 0 43 4 26 8 54 3 58 1 69
+4 20 6 86 5 21 8 79 9 62 2 34 0 27 1 81 7 30 3 46
+9 68 6 66 5 98 8 86 7 66 0 56 3 82 1 95 4 47 2 78
+0 30 3 50 7 34 2 58 1 77 5 34 8 84 4 40 9 46 6 44
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/abz7.txt b/scalar-variable/job-shop-scheduling/data/jsplib/abz7.txt
new file mode 100644
index 0000000..535faa8
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/abz7.txt
@@ -0,0 +1,25 @@
+#+++++++++++++++++++++++++++++
+# instance abz7
+#+++++++++++++++++++++++++++++
+# Adams, Balas, and Zawack 15 x 20 instance (Table 1, instance 7)
+20 15
+ 2 24  3 12  9 17  4 27  0 21  6 25  8 27  7 26  1 30  5 31 11 18 14 16 13 39 10 19 12 26
+ 6 30  3 15 12 20 11 19  1 24 13 15 10 28  2 36  5 26  7 15  0 11  8 23 14 20  9 26  4 28
+ 6 35  0 22 13 23  7 32  2 20  3 12 12 19 10 23  9 17  1 14  5 16 11 29  8 16  4 22 14 22
+ 9 20  6 29  1 19  7 14 12 33  4 30  0 32  5 21 11 29 10 24 14 25  2 29  3 13  8 20 13 18
+11 23 13 20  1 28  6 32  7 16  5 18  8 24  9 23  3 24 10 34  2 24  0 24 14 28 12 15  4 18
+ 8 24 11 19 14 21  1 33  7 34  6 35  5 40 10 36  3 23  2 26  4 15  9 28 13 38 12 13  0 25
+13 27  3 30  6 21  8 19 12 12  4 27  2 39  9 13 14 12  5 36 10 21 11 17  1 29  0 17  7 33
+ 5 27  4 19  6 29  9 20  3 21 10 40  8 14 14 39 13 39  2 27  1 36 12 12 11 37  7 22  0 13
+13 32 11 29  8 24  3 27  5 40  4 21  9 26  0 27 14 27  6 16  2 21 10 13  7 28 12 28  1 32
+12 35  1 11  5 39 14 18  7 23  0 34  3 24 13 11  8 30 11 31  4 15 10 15  2 28  9 26  6 33
+10 28  5 37 12 29  1 31  7 25  8 13 14 14  4 20  3 27  9 25 13 31 11 14  6 25  2 39  0 36
+ 0 22 11 25  5 28 13 35  4 31  8 21  9 20 14 19  2 29  7 32 10 18  1 18  3 11 12 17  6 15
+12 39  5 32  2 36  8 14  3 28 13 37  0 38  6 20  7 19 11 12 14 22  1 36  4 15  9 32 10 16
+ 8 28  1 29 14 40 12 23  4 34  5 33  6 27 10 17  0 20  7 28 11 21  2 21 13 20  9 33  3 27
+ 9 21 14 34  3 30 12 38  0 11 11 16  2 14  5 14  1 34  8 33  4 23 13 40 10 12  6 23  7 27
+ 9 13 14 40  7 36  4 17  0 13  5 33  8 25 13 24 10 23  3 36  2 29  1 18 11 13  6 33 12 13
+ 3 25  5 15  2 28 12 40  7 39  1 31  8 35  6 31 11 36  4 12 10 33 14 19  9 16 13 27  0 21
+12 22 10 14  0 12  2 20  5 12  1 18 11 17  8 39 14 31  3 31  7 32  9 20 13 29  4 13  6 26
+ 5 18 10 30  7 38 14 22 13 15 11 20  9 16  3 17  1 12  2 13 12 40  6 17  8 30  4 38  0 13
+ 9 31  8 39 12 27  1 14  5 33  3 31 11 22 13 36  0 16  7 11 14 14  4 29  6 28  2 22 10 17
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/abz8.txt b/scalar-variable/job-shop-scheduling/data/jsplib/abz8.txt
new file mode 100644
index 0000000..a17542e
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/abz8.txt
@@ -0,0 +1,25 @@
+#+++++++++++++++++++++++++++++
+# instance abz8
+#+++++++++++++++++++++++++++++
+# Adams, Balas, and Zawack 15 x 20 instance (Table 1, instance 8)
+20 15
+ 0 19  9 33  2 32 13 18 10 39  8 34  6 25  4 36 11 40 12 33  1 31 14 30  3 34  5 26  7 13
+ 9 11 10 22 14 19  5 12  4 25  6 38  0 29  7 39 13 19 11 22  1 23  3 20  2 40 12 19  8 26
+ 3 25  8 17 11 24 13 40 10 32 14 16  5 39  9 19  0 24  1 39  4 17  2 35  7 38  6 20 12 31
+14 22  3 36  2 34 12 17  4 30 13 12  1 13  6 25  9 12  7 18 10 31  0 39  5 40  8 26 11 37
+12 32 14 15  1 35  7 13  8 32 11 23  6 22  4 21  0 38  2 38  3 40 10 31  5 11 13 37  9 16
+10 23 12 38  8 11 14 27  9 11  6 25  5 14  4 12  2 27 11 26  7 29  3 28 13 21  0 20  1 30
+ 6 39  8 38  0 15 12 27 10 22  9 27  2 32  4 40  3 12 13 20 14 21 11 22  5 17  7 38  1 27
+11 11 13 24 10 38  8 15  9 19 14 13  5 30  0 26  2 29  6 33 12 21  1 15  3 21  4 28  7 33
+ 8 20  6 17  5 26  3 34  9 23  0 16  2 18  4 35 12 24 10 16 11 26  7 12 14 13 13 27  1 19
+ 1 18  7 37 14 27  9 40  5 40  6 17  8 22  3 17 10 30  0 38  4 21 12 32 11 24 13 24  2 30
+11 19  0 22 13 36  6 18  5 22  3 17 14 35 10 34  7 23  8 19  2 29  1 22 12 17  4 33  9 39
+ 6 32  3 22 12 24  5 13  4 13  1 11  0 11 13 25  8 13  2 15 10 33 11 17 14 16  9 38  7 24
+14 16 13 16  1 37  8 25  2 26  3 11  9 34  4 14  0 20  6 36 12 12  5 29 10 25  7 32 11 12
+ 8 20 10 24 11 27  9 38  5 34 12 39  7 33  4 37  2 31 13 15 14 34  3 33  6 26  1 36  0 14
+ 8 31  0 17  9 13  1 21 10 17  7 19 13 14  3 40  5 32 11 25  2 34 14 23  6 13 12 40  4 26
+ 8 38 12 17  3 14 13 17  4 12  1 35  6 35  0 19 10 36  7 19  9 29  2 31  5 26 11 35 14 37
+14 20  3 16  0 33 10 14  5 27  7 31  8 16  6 31 12 28  9 37  4 37  2 29 11 38  1 30 13 36
+11 18  3 37 14 16  6 15  8 14 12 11 13 32  5 12  1 11 10 29  7 19  4 12  9 18  2 26  0 39
+11 11  2 11 12 22  9 35 14 20  7 31  4 19  3 39  5 28  6 33 10 34  1 38  0 20 13 17  8 28
+ 2 12 12 25  5 23  8 21  6 27  9 30 14 23 11 39  3 26 13 34  7 17  1 24  4 12  0 19 10 36
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/abz9.txt b/scalar-variable/job-shop-scheduling/data/jsplib/abz9.txt
new file mode 100644
index 0000000..8336374
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/abz9.txt
@@ -0,0 +1,25 @@
+#+++++++++++++++++++++++++++++
+# instance abz9
+#+++++++++++++++++++++++++++++
+# Adams, Balas, and Zawack 15 x 20 instance (Table 1, instance 9)
+20 15
+ 6 14  5 21  8 13  4 11  1 11 14 35 13 20 11 17 10 18 12 11  2 23  3 13  0 15  7 11  9 35
+ 1 35  5 31  0 13  3 26  6 14  9 17  7 38 12 20 10 19 13 12  8 16  4 34 11 15 14 12  2 14
+ 0 30  4 35  2 40 10 35  6 30 14 23  8 29 13 37  7 38  3 40  9 26 12 11  1 40 11 36  5 17
+ 7 40  5 18  4 12  8 23  0 23  9 14 13 16 12 14 10 23  3 12  6 16 14 32  1 40 11 25  2 29
+ 2 35  3 15 12 31 11 28  6 32  4 30 10 27  7 29  0 38 13 11  1 23 14 17  5 27  9 37  8 29
+ 5 33  3 33  6 19 12 40 10 19  0 33 13 26  2 31 11 28  7 36  4 38  1 21 14 25  9 40  8 35
+13 25  0 32 11 33 12 18  4 32  6 28  5 15  3 35  9 14  2 34  7 23 10 32  1 17 14 26  8 19
+ 2 16 12 33  9 34 11 30 13 40  8 12 14 26  5 26  6 15  3 21  1 40  4 32  0 14  7 30 10 35
+ 2 17 10 16 14 20  6 24  8 26  3 36 12 22  0 14 13 11  9 20  7 23  1 29 11 23  4 15  5 40
+ 4 27  9 37  3 40 11 14 13 25  7 30  0 34  2 11  5 15 12 32  1 36 10 12 14 28  8 31  6 23
+13 25  0 22  3 27  8 14  5 25  6 20 14 18  7 14  1 19  2 17  4 27  9 22 12 22 11 27 10 21
+14 34 10 15  0 22  3 29 13 34  6 40  7 17  2 32 12 20  5 39  4 31 11 16  1 37  8 33  9 13
+ 6 12 12 27  4 17  2 24  8 11  5 19 14 11  3 17  9 25  1 11 11 31 13 33  7 31 10 12  0 22
+ 5 22 14 15  0 16  8 32  7 20  4 22  9 11 13 19  1 30 12 33  6 29 11 18  3 34 10 32  2 18
+ 5 27  3 26 10 28  6 37  4 18 12 12 11 11 13 26  7 27  9 40 14 19  1 24  2 18  0 12  8 34
+ 8 15  5 28  9 25  6 32  1 13  7 38 11 11  2 34  4 25  0 20 10 32  3 23 12 14 14 16 13 20
+ 1 15  4 13  8 37  3 14 10 22  5 24 12 26  7 22  9 34 14 22 11 19 13 32  0 29  2 13  6 35
+ 7 36  5 33 13 28  9 20 10 30  4 33 14 29  0 34  3 22 11 12  6 30  8 12  1 35  2 13 12 35
+14 26 11 31  5 35  2 38 13 19 10 35  4 27  8 29  3 39  9 13  6 14  7 26  0 17  1 22 12 15
+ 1 36  7 34 11 33  8 17 14 38  6 39  5 16  3 27 13 29  2 16  0 16  4 19  9 40 12 35 10 39
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/ft06.txt b/scalar-variable/job-shop-scheduling/data/jsplib/ft06.txt
index b2169b2..24430d1 100644
--- a/scalar-variable/job-shop-scheduling/data/jsplib/ft06.txt
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/ft06.txt
@@ -1,7 +1,11 @@
+#+++++++++++++++++++++++++++++
+# instance ft06
+#+++++++++++++++++++++++++++++
+# Fisher and Thompson 6x6 instance, alternate name (mt06)
 6 6
-2 1 0 3 1 6 3 7 5 3 4 6
-1 8 2 5 4 10 5 10 0 10 3 4
-2 5 3 4 5 8 0 9 1 1 4 7
-1 5 0 5 2 5 3 3 4 8 5 9
-2 9 1 3 4 5 5 4 0 3 3 1
-1 3 3 3 5 9 0 10 4 4 2 1
+2  1  0  3  1  6  3  7  5  3  4  6
+1  8  2  5  4 10  5 10  0 10  3  4
+2  5  3  4  5  8  0  9  1  1  4  7
+1  5  0  5  2  5  3  3  4  8  5  9
+2  9  1  3  4  5  5  4  0  3  3  1
+1  3  3  3  5  9  0 10  4  4  2  1
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/ft10.txt b/scalar-variable/job-shop-scheduling/data/jsplib/ft10.txt
new file mode 100644
index 0000000..2bd85bd
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/ft10.txt
@@ -0,0 +1,15 @@
+#+++++++++++++++++++++++++++++
+# instance ft10
+#+++++++++++++++++++++++++++++
+# Fisher and Thompson 10x10 instance, alternate name (mt10)
+10 10
+0 29 1 78 2  9 3 36 4 49 5 11 6 62 7 56 8 44 9 21
+0 43 2 90 4 75 9 11 3 69 1 28 6 46 5 46 7 72 8 30
+1 91 0 85 3 39 2 74 8 90 5 10 7 12 6 89 9 45 4 33
+1 81 2 95 0 71 4 99 6  9 8 52 7 85 3 98 9 22 5 43
+2 14 0  6 1 22 5 61 3 26 4 69 8 21 7 49 9 72 6 53
+2 84 1  2 5 52 3 95 8 48 9 72 0 47 6 65 4  6 7 25
+1 46 0 37 3 61 2 13 6 32 5 21 9 32 8 89 7 30 4 55
+2 31 0 86 1 46 5 74 4 32 6 88 8 19 9 48 7 36 3 79
+0 76 1 69 3 76 5 51 2 85 9 11 6 40 7 89 4 26 8 74
+1 85 0 13 2 61 6  7 8 64 9 76 5 47 3 52 4 90 7 45
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/ft20.txt b/scalar-variable/job-shop-scheduling/data/jsplib/ft20.txt
new file mode 100644
index 0000000..9478219
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/ft20.txt
@@ -0,0 +1,25 @@
+#+++++++++++++++++++++++++++++
+# instance ft20
+#+++++++++++++++++++++++++++++
+# Fisher and Thompson 20x5 instance, alternate name (mt20)
+20 5
+0 29 1  9 2 49 3 62 4 44
+0 43 1 75 3 69 2 46 4 72
+1 91 0 39 2 90 4 12 3 45
+1 81 0 71 4  9 2 85 3 22
+2 14 1 22 0 26 3 21 4 72
+2 84 1 52 4 48 0 47 3  6
+1 46 0 61 2 32 3 32 4 30
+2 31 1 46 0 32 3 19 4 36
+0 76 3 76 2 85 1 40 4 26
+1 85 2 61 0 64 3 47 4 90
+1 78 3 36 0 11 4 56 2 21
+2 90 0 11 1 28 3 46 4 30
+0 85 2 74 1 10 3 89 4 33
+2 95 0 99 1 52 3 98 4 43
+0  6 1 61 4 69 2 49 3 53
+1  2 0 95 3 72 4 65 2 25
+0 37 2 13 1 21 3 89 4 55
+0 86 1 74 4 88 2 48 3 79
+1 69 2 51 0 11 3 89 4 74
+0 13 1  7 2 76 3 52 4 45
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/la01.txt b/scalar-variable/job-shop-scheduling/data/jsplib/la01.txt
index 4531d81..de4b984 100644
--- a/scalar-variable/job-shop-scheduling/data/jsplib/la01.txt
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/la01.txt
@@ -1,3 +1,7 @@
+#+++++++++++++++++++++++++++++
+# instance la01
+#+++++++++++++++++++++++++++++
+# Lawrence 10x5 instance (Table 3, instance 1); also called (setf1) or (F1)
 10 5
 1 21 0 53 4 95 3 55 2 34
 0 21 3 52 4 16 2 26 1 71
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/la02.txt b/scalar-variable/job-shop-scheduling/data/jsplib/la02.txt
index 4574595..f37607c 100644
--- a/scalar-variable/job-shop-scheduling/data/jsplib/la02.txt
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/la02.txt
@@ -1,11 +1,15 @@
+#+++++++++++++++++++++++++++++
+# instance la02
+#+++++++++++++++++++++++++++++
+# Lawrence 10x5 instance (Table 3, instance 2); also called (setf2) or (F2)
 10 5
-0 20 3 87 4 31 2 76 1 17
+0 20 3 87 1 31 4 76 2 17
 4 25 2 32 0 24 1 18 3 81
-3 72 1 23 2 28 0 60 4 40
-1 15 0 35 3 76 2 31 4 13
-0 28 1 59 4 89 2 58 3 11
-2 45 4 24 1 41 3 34 0 94
-1 93 2 29 3 77 0 79 4 62
-4 32 0 54 3 31 1 55 2 13
-2 30 4 89 0 7 3 13 1 66
-1 38 3 21 0 54 2 72 4 95
+1 72 2 23 4 28 0 58 3 99
+2 86 1 76 4 97 0 45 3 90
+4 27 0 42 3 48 2 17 1 46
+1 67 0 98 4 48 3 27 2 62
+4 28 1 12 3 19 0 80 2 50
+1 63 0 94 2 98 3 50 4 80
+4 14 0 75 2 50 1 41 3 55
+4 72 2 18 1 37 3 79 0 61
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/la03.txt b/scalar-variable/job-shop-scheduling/data/jsplib/la03.txt
new file mode 100644
index 0000000..dfb9da0
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/la03.txt
@@ -0,0 +1,15 @@
+#+++++++++++++++++++++++++++++
+# instance la03
+#+++++++++++++++++++++++++++++
+# Lawrence 10x5 instance (Table 3, instance 3); also called (setf3) or (F3)
+10 5
+1 23 2 45 0 82 4 84 3 38
+2 21 1 29 0 18 4 41 3 50
+2 38 3 54 4 16 0 52 1 52
+4 37 0 54 2 74 1 62 3 57
+4 57 0 81 1 61 3 68 2 30
+4 81 0 79 1 89 2 89 3 11
+3 33 2 20 0 91 4 20 1 66
+4 24 1 84 0 32 2 55 3  8
+4 56 0  7 3 54 2 64 1 39
+4 40 1 83 0 19 2  8 3  7
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/la04.txt b/scalar-variable/job-shop-scheduling/data/jsplib/la04.txt
new file mode 100644
index 0000000..69b2842
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/la04.txt
@@ -0,0 +1,15 @@
+#+++++++++++++++++++++++++++++
+# instance la04
+#+++++++++++++++++++++++++++++
+# Lawrence 10x5 instance (Table 3, instance 4); also called (setf4) or (F4)
+10 5
+0 12 2 94 3 92 4 91 1  7
+1 19 3 11 4 66 2 21 0 87
+1 14 0 75 3 13 4 16 2 20
+2 95 4 66 0  7 3  7 1 77
+1 45 3  6 4 89 0 15 2 34
+3 77 2 20 0 76 4 88 1 53
+2 74 1 88 0 52 3 27 4  9
+1 88 3 69 0 62 4 98 2 52
+2 61 4  9 0 62 1 52 3 90
+2 54 4  5 3 59 1 15 0 88
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/la05.txt b/scalar-variable/job-shop-scheduling/data/jsplib/la05.txt
new file mode 100644
index 0000000..25dcc9b
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/la05.txt
@@ -0,0 +1,15 @@
+#+++++++++++++++++++++++++++++
+# instance la05
+#+++++++++++++++++++++++++++++
+# Lawrence 10x5 instance (Table 3, instance 5); also called (setf5) or (F5)
+10 5
+1 72 0 87 4 95 2 66 3 60
+4  5 3 35 0 48 2 39 1 54
+1 46 3 20 2 21 0 97 4 55
+0 59 3 19 4 46 1 34 2 37
+4 23 2 73 3 25 1 24 0 28
+3 28 0 45 4  5 1 78 2 83
+0 53 3 71 1 37 4 29 2 12
+4 12 2 87 3 33 1 55 0 38
+2 49 3 83 1 40 0 48 4  7
+2 65 3 17 0 90 4 27 1 23
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/la06.txt b/scalar-variable/job-shop-scheduling/data/jsplib/la06.txt
new file mode 100644
index 0000000..f7137e9
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/la06.txt
@@ -0,0 +1,20 @@
+#+++++++++++++++++++++++++++++
+# instance la06
+#+++++++++++++++++++++++++++++
+# Lawrence 15x5 instance (Table 4, instance 1); also called (setg1) or (G1)
+15 5
+1 21 2 34 4 95 0 53 3 55
+3 52 4 16 1 71 2 26 0 21
+2 31 0 12 1 42 3 39 4 98
+3 77 1 77 4 79 0 55 2 66
+4 37 3 34 2 64 1 19 0 83
+2 43 1 54 0 92 3 62 4 79
+0 93 3 69 1 87 4 77 2 87
+0 60 1 41 2 38 4 83 3 24
+2 98 3 17 4 25 0 44 1 49
+0 96 4 77 3 79 1 75 2 43
+4 28 2 35 0 95 3 76 1  7
+0 61 4 10 2 95 1  9 3 35
+4 59 3 16 1 91 2 59 0 46
+4 43 1 52 0 28 2 27 3 50
+0 87 1 45 2 39 4  9 3 41
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/la07.txt b/scalar-variable/job-shop-scheduling/data/jsplib/la07.txt
new file mode 100644
index 0000000..634ed52
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/la07.txt
@@ -0,0 +1,20 @@
+#+++++++++++++++++++++++++++++
+# instance la07
+#+++++++++++++++++++++++++++++
+# Lawrence 15x5 instance (Table 4, instance 2); also called (setg2) or (G2)
+15 5
+0 47 4 57 1 71 3 96 2 14
+0 75 1 60 4 22 3 79 2 65
+3 32 0 33 2 69 1 31 4 58
+0 44 1 34 4 51 3 58 2 47
+3 29 1 44 0 62 2 17 4  8
+1 15 2 40 0 97 4 38 3 66
+2 58 1 39 0 57 4 20 3 50
+2 57 3 32 4 87 0 63 1 21
+4 56 0 84 2 90 1 85 3 61
+4 15 0 20 1 67 3 30 2 70
+4 84 0 82 1 23 2 45 3 38
+3 50 2 21 0 18 4 41 1 29
+4 16 1 52 0 52 2 38 3 54
+4 37 0 54 3 57 2 74 1 62
+4 57 1 61 0 81 2 30 3 68
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/la08.txt b/scalar-variable/job-shop-scheduling/data/jsplib/la08.txt
new file mode 100644
index 0000000..0c97321
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/la08.txt
@@ -0,0 +1,20 @@
+#+++++++++++++++++++++++++++++
+# instance la08
+#+++++++++++++++++++++++++++++
+# Lawrence 15x5 instance (Table 4, instance 3); also called (setg3) or (G3)
+15 5
+3 92 2 94 0 12 4 91 1  7
+2 21 1 19 0 87 3 11 4 66
+1 14 3 13 0 75 4 16 2 20
+2 95 4 66 0  7 1 77 3  7
+2 34 4 89 3  6 1 45 0 15
+4 88 3 77 2 20 1 53 0 76
+4  9 3 27 0 52 1 88 2 74
+3 69 2 52 0 62 1 88 4 98
+3 90 0 62 4  9 2 61 1 52
+4  5 2 54 3 59 0 88 1 15
+0 41 1 50 4 78 3 53 2 23
+0 38 4 72 2 91 3 68 1 71
+0 45 3 95 4 52 2 25 1  6
+3 30 1 66 0 23 4 36 2 17
+2 95 0 71 3 76 1  8 4 88
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/la09.txt b/scalar-variable/job-shop-scheduling/data/jsplib/la09.txt
new file mode 100644
index 0000000..e545f61
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/la09.txt
@@ -0,0 +1,20 @@
+#+++++++++++++++++++++++++++++
+# instance la09
+#+++++++++++++++++++++++++++++
+# Lawrence 15x5 instance (Table 4, instance 4); also called (setg4) or (G4)
+15 5
+1 66 3 85 2 84 0 62 4 19
+3 59 1 64 2 46 4 13 0 25
+4 88 3 80 1 73 2 53 0 41
+0 14 1 67 2 57 3 74 4 47
+0 84 4 64 2 41 3 84 1 78
+0 63 3 28 1 46 2 26 4 52
+3 10 2 17 4 73 1 11 0 64
+2 67 1 97 3 95 4 38 0 85
+2 95 4 46 0 59 1 65 3 93
+2 43 4 85 3 32 1 85 0 60
+4 49 3 41 2 61 0 66 1 90
+1 17 0 23 3 70 4 99 2 49
+4 40 3 73 0 73 1 98 2 68
+3 57 1  9 2  7 0 13 4 98
+0 37 1 85 2 17 4 79 3 41
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/la10.txt b/scalar-variable/job-shop-scheduling/data/jsplib/la10.txt
new file mode 100644
index 0000000..2d01284
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/la10.txt
@@ -0,0 +1,20 @@
+#+++++++++++++++++++++++++++++
+# instance la10
+#+++++++++++++++++++++++++++++
+# Lawrence 15x5 instance (Table 4, instance 5); also called (setg5) or (G5)
+15 5
+1 58 2 44 3  5 0  9 4 58
+1 89 0 97 4 96 3 77 2 84
+0 77 1 87 2 81 4 39 3 85
+3 57 1 21 2 31 0 15 4 73
+2 48 0 40 1 49 3 70 4 71
+3 34 4 82 2 80 0 10 1 22
+1 91 4 75 0 55 2 17 3  7
+2 62 3 47 1 72 4 35 0 11
+0 64 3 75 4 50 1 90 2 94
+2 67 4 20 3 15 0 12 1 71
+0 52 4 93 3 68 2 29 1 57
+2 70 0 58 1 93 4  7 3 77
+3 27 2 82 1 63 4  6 0 95
+1 87 2 56 4 36 0 26 3 48
+3 76 2 36 0 36 4 15 1  8
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/la11.txt b/scalar-variable/job-shop-scheduling/data/jsplib/la11.txt
new file mode 100644
index 0000000..d9f5a93
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/la11.txt
@@ -0,0 +1,25 @@
+#+++++++++++++++++++++++++++++
+# instance la11
+#+++++++++++++++++++++++++++++
+# Lawrence 20x5 instance (Table 5, instance 1); also called (seth1) or H1
+20 5
+2 34 1 21 0 53 3 55 4 95
+0 21 3 52 1 71 4 16 2 26
+0 12 1 42 2 31 4 98 3 39
+2 66 3 77 4 79 0 55 1 77
+0 83 4 37 3 34 1 19 2 64
+4 79 2 43 0 92 3 62 1 54
+0 93 4 77 2 87 1 87 3 69
+4 83 3 24 1 41 2 38 0 60
+4 25 1 49 0 44 2 98 3 17
+0 96 1 75 2 43 4 77 3 79
+0 95 3 76 1  7 4 28 2 35
+4 10 2 95 0 61 1  9 3 35
+1 91 2 59 4 59 0 46 3 16
+2 27 1 52 4 43 0 28 3 50
+4  9 0 87 3 41 2 39 1 45
+1 54 0 20 4 43 3 14 2 71
+4 33 1 28 3 26 0 78 2 37
+1 89 0 33 2  8 3 66 4 42
+4 84 0 69 2 94 1 74 3 27
+4 81 2 45 1 78 3 69 0 96
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/la12.txt b/scalar-variable/job-shop-scheduling/data/jsplib/la12.txt
new file mode 100644
index 0000000..bc0949b
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/la12.txt
@@ -0,0 +1,25 @@
+#+++++++++++++++++++++++++++++
+# instance la12
+#+++++++++++++++++++++++++++++
+# Lawrence 20x5 instance (Table 5, instance 2); also called (seth2) or H2
+20 5
+1 23 0 82 4 84 2 45 3 38
+3 50 4 41 1 29 0 18 2 21
+4 16 3 54 1 52 2 38 0 52
+1 62 3 57 4 37 2 74 0 54
+3 68 1 61 2 30 0 81 4 57
+1 89 2 89 3 11 0 79 4 81
+1 66 0 91 3 33 4 20 2 20
+3  8 4 24 2 55 0 32 1 84
+0  7 2 64 1 39 4 56 3 54
+0 19 4 40 3  7 2  8 1 83
+0 63 2 64 3 91 4 40 1  6
+1 42 3 61 4 15 2 98 0 74
+1 80 0 26 3 75 4  6 2 87
+2 39 4 22 0 75 3 24 1 44
+1 15 3 79 4  8 0 12 2 20
+3 26 2 43 0 80 4 22 1 61
+2 62 1 36 0 63 3 96 4 40
+1 33 3 18 0 22 4  5 2 10
+2 64 4 64 0 89 1 96 3 95
+2 18 4 23 3 15 1 38 0  8
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/la13.txt b/scalar-variable/job-shop-scheduling/data/jsplib/la13.txt
new file mode 100644
index 0000000..fdfe56a
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/la13.txt
@@ -0,0 +1,25 @@
+#+++++++++++++++++++++++++++++
+# instance la13
+#+++++++++++++++++++++++++++++
+# Lawrence 20x5 instance (Table 5, instance 3); also called (seth3) or (H3)
+20 5
+3 60 0 87 1 72 4 95 2 66
+1 54 0 48 2 39 3 35 4  5
+3 20 1 46 0 97 2 21 4 55
+2 37 0 59 3 19 1 34 4 46
+2 73 3 25 1 24 0 28 4 23
+1 78 3 28 2 83 0 45 4  5
+3 71 1 37 2 12 4 29 0 53
+4 12 3 33 1 55 2 87 0 38
+0 48 1 40 2 49 3 83 4  7
+0 90 4 27 2 65 3 17 1 23
+0 62 3 85 1 66 2 84 4 19
+3 59 2 46 4 13 1 64 0 25
+2 53 1 73 3 80 4 88 0 41
+2 57 4 47 0 14 1 67 3 74
+2 41 4 64 3 84 1 78 0 84
+4 52 3 28 2 26 0 63 1 46
+1 11 0 64 3 10 4 73 2 17
+4 38 3 95 0 85 1 97 2 67
+3 93 1 65 2 95 0 59 4 46
+0 60 1 85 2 43 4 85 3 32
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/la14.txt b/scalar-variable/job-shop-scheduling/data/jsplib/la14.txt
new file mode 100644
index 0000000..7d22fcc
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/la14.txt
@@ -0,0 +1,25 @@
+#+++++++++++++++++++++++++++++
+# instance la14
+#+++++++++++++++++++++++++++++
+# Lawrence 20x5 instance (Table 5, instance 4); also called (seth4) or (H4)
+20 5
+3  5 4 58 2 44 0  9 1 58
+1 89 4 96 0 97 2 84 3 77
+2 81 3 85 1 87 4 39 0 77
+0 15 3 57 4 73 1 21 2 31
+2 48 4 71 3 70 0 40 1 49
+0 10 4 82 3 34 2 80 1 22
+2 17 0 55 1 91 4 75 3  7
+3 47 2 62 1 72 4 35 0 11
+1 90 2 94 4 50 0 64 3 75
+3 15 2 67 0 12 4 20 1 71
+4 93 2 29 0 52 1 57 3 68
+3 77 1 93 0 58 2 70 4  7
+1 63 3 27 0 95 4  6 2 82
+4 36 0 26 3 48 2 56 1 87
+2 36 1  8 4 15 3 76 0 36
+4 78 1 84 3 41 0 30 2 76
+1 78 0 75 4 88 3 13 2 81
+0 54 4 40 2 13 1 82 3 29
+1 26 4 82 0 52 3  6 2  6
+3 54 1 64 0 54 2 32 4 88
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/la15.txt b/scalar-variable/job-shop-scheduling/data/jsplib/la15.txt
new file mode 100644
index 0000000..d8c41e2
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/la15.txt
@@ -0,0 +1,25 @@
+#+++++++++++++++++++++++++++++
+# instance la15
+#+++++++++++++++++++++++++++++
+# Lawrence 20x5 instance (Table 5, instance 5); also called (seth5) or (H5)
+20 5
+0  6 2 40 1 81 3 37 4 19
+2 40 3 32 0 55 4 81 1  9
+1 46 4 65 2 70 3 55 0 77
+2 21 4 65 0 64 3 25 1 15
+2 85 0 40 1 44 3 24 4 37
+0 89 4 29 1 83 3 31 2 84
+4 59 3 38 1 80 2 30 0  8
+0 80 2 56 1 77 4 41 3 97
+4 56 0 91 3 50 2 71 1 17
+1 40 0 88 4 59 2  7 3 80
+0 45 1 29 2  8 4 77 3 58
+2 36 0 54 3 96 1  9 4 10
+0 28 2 73 1 98 3 92 4 87
+0 70 3 86 2 27 1 99 4 96
+1 95 0 59 4 56 3 85 2 41
+1 81 2 92 4 32 0 52 3 39
+1  7 4 22 2 12 0 88 3 60
+3 45 0 93 2 69 4 49 1 27
+0 21 1 84 2 61 3 68 4 26
+1 82 2 33 4 71 0 99 3 44
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/la16.txt b/scalar-variable/job-shop-scheduling/data/jsplib/la16.txt
new file mode 100644
index 0000000..1a18982
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/la16.txt
@@ -0,0 +1,15 @@
+#+++++++++++++++++++++++++++++
+# instance la16
+#+++++++++++++++++++++++++++++
+# Lawrence 10x10 instance (Table 6, instance 1); also called (seta1) or (A1)
+10 10
+1 21 6 71 9 16 8 52 7 26 2 34 0 53 4 21 3 55 5 95
+4 55 2 31 5 98 9 79 0 12 7 66 1 42 8 77 6 77 3 39
+3 34 2 64 8 62 1 19 4 92 9 79 7 43 6 54 0 83 5 37
+1 87 3 69 2 87 7 38 8 24 9 83 6 41 0 93 5 77 4 60
+2 98 0 44 5 25 6 75 7 43 1 49 4 96 9 77 3 17 8 79
+2 35 3 76 5 28 9 10 4 61 6  9 0 95 8 35 1  7 7 95
+3 16 2 59 0 46 1 91 9 43 8 50 6 52 5 59 4 28 7 27
+1 45 0 87 3 41 4 20 6 54 9 43 8 14 5  9 2 39 7 71
+4 33 2 37 8 66 5 33 3 26 7  8 1 28 6 89 9 42 0 78
+8 69 9 81 2 94 4 96 3 27 0 69 7 45 6 78 1 74 5 84
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/la17.txt b/scalar-variable/job-shop-scheduling/data/jsplib/la17.txt
new file mode 100644
index 0000000..9b8584b
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/la17.txt
@@ -0,0 +1,15 @@
+#+++++++++++++++++++++++++++++
+# instance la17
+#+++++++++++++++++++++++++++++
+# Lawrence 10x10 instance (Table 6, instance 2); also called (seta2) or (A2)
+10 10
+4 18 7 21 9 41 2 45 3 38 8 50 5 84 6 29 1 23 0 82
+8 57 5 16 1 52 7 74 2 38 3 54 6 62 9 37 4 54 0 52
+2 30 4 79 3 68 1 61 8 11 6 89 7 89 0 81 9 81 5 57
+0 91 8  8 3 33 7 55 5 20 2 20 4 32 6 84 1 66 9 24
+9 40 0  7 4 19 8  7 6 83 2 64 5 56 3 54 7  8 1 39
+3 91 2 64 5 40 0 63 7 98 4 74 8 61 1  6 6 42 9 15
+1 80 7 39 8 24 3 75 4 75 5  6 6 44 0 26 2 87 9 22
+1 15 7 43 2 20 0 12 8 26 6 61 3 79 9 22 5  8 4 80
+2 62 3 96 4 22 9  5 0 63 6 33 7 10 8 18 1 36 5 40
+1 96 0 89 5 64 3 95 9 23 7 18 8 15 2 64 6 38 4  8
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/la18.txt b/scalar-variable/job-shop-scheduling/data/jsplib/la18.txt
new file mode 100644
index 0000000..0c2b4f7
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/la18.txt
@@ -0,0 +1,15 @@
+#+++++++++++++++++++++++++++++
+# instance la18
+#+++++++++++++++++++++++++++++
+# Lawrence 10x10 instance (Table 6, instance 3); also called (seta3) or (A3)
+10 10
+6 54 0 87 4 48 3 60 7 39 8 35 1 72 5 95 2 66 9  5
+3 20 9 46 6 34 5 55 0 97 8 19 4 59 2 21 7 37 1 46
+4 45 1 24 8 28 0 28 7 83 6 78 5 23 3 25 9  5 2 73
+9 12 1 37 4 38 3 71 8 33 2 12 6 55 0 53 7 87 5 29
+3 83 2 49 6 23 9 27 7 65 0 48 4 90 5  7 1 40 8 17
+1 66 4 25 0 62 2 84 9 13 6 64 7 46 8 59 5 19 3 85
+1 73 3 80 0 41 2 53 9 47 7 57 8 74 4 14 6 67 5 88
+5 64 3 84 6 46 1 78 0 84 7 26 8 28 9 52 2 41 4 63
+1 11 0 64 7 67 4 85 3 10 5 73 9 38 8 95 6 97 2 17
+4 60 8 32 2 95 3 93 1 65 6 85 7 43 9 85 5 46 0 59
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/la19.txt b/scalar-variable/job-shop-scheduling/data/jsplib/la19.txt
new file mode 100644
index 0000000..f1a561a
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/la19.txt
@@ -0,0 +1,15 @@
+#+++++++++++++++++++++++++++++
+# instance la19
+#+++++++++++++++++++++++++++++
+# Lawrence 10x10 instance (Table 6, instance 4); also called (seta4) or (A4)
+10 10
+2 44 3  5 5 58 4 97 0  9 7 84 8 77 9 96 1 58 6 89
+4 15 7 31 1 87 8 57 0 77 3 85 2 81 5 39 9 73 6 21
+9 82 6 22 4 10 3 70 1 49 0 40 8 34 2 48 7 80 5 71
+1 91 2 17 7 62 5 75 8 47 4 11 3  7 6 72 9 35 0 55
+6 71 1 90 3 75 0 64 2 94 8 15 4 12 7 67 9 20 5 50
+7 70 5 93 8 77 2 29 4 58 6 93 3 68 1 57 9  7 0 52
+6 87 1 63 4 26 5  6 2 82 3 27 7 56 8 48 9 36 0 95
+0 36 5 15 8 41 9 78 3 76 6 84 4 30 7 76 2 36 1  8
+5 88 2 81 3 13 6 82 4 54 7 13 8 29 9 40 1 78 0 75
+9 88 4 54 6 64 7 32 0 52 2  6 8 54 5 82 3  6 1 26
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/la20.txt b/scalar-variable/job-shop-scheduling/data/jsplib/la20.txt
new file mode 100644
index 0000000..b0db920
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/la20.txt
@@ -0,0 +1,15 @@
+#+++++++++++++++++++++++++++++
+# instance la20
+#+++++++++++++++++++++++++++++
+# Lawrence 10x10 instance (Table 6, instance 5); also called (seta5) or (A5)
+10 10
+6  9 1 81 4 55 2 40 8 32 3 37 0  6 5 19 9 81 7 40
+7 21 2 70 9 65 4 64 1 46 5 65 8 25 0 77 3 55 6 15
+2 85 5 37 0 40 3 24 1 44 6 83 4 89 8 31 7 84 9 29
+4 80 6 77 7 56 0  8 2 30 5 59 3 38 1 80 9 41 8 97
+0 91 6 40 4 88 1 17 2 71 3 50 9 59 8 80 5 56 7  7
+2  8 6  9 3 58 5 77 1 29 8 96 0 45 9 10 4 54 7 36
+4 70 3 92 1 98 5 87 6 99 7 27 8 86 9 96 0 28 2 73
+1 95 7 92 3 85 4 52 6 81 9 32 8 39 0 59 2 41 5 56
+3 60 8 45 0 88 2 12 1  7 5 22 4 93 9 49 7 69 6 27
+0 21 2 61 3 68 5 26 6 82 9 71 8 44 4 99 7 33 1 84
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/la21.txt b/scalar-variable/job-shop-scheduling/data/jsplib/la21.txt
new file mode 100644
index 0000000..46265ae
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/la21.txt
@@ -0,0 +1,20 @@
+#+++++++++++++++++++++++++++++
+# instance la21
+#+++++++++++++++++++++++++++++
+# Lawrence 15x10 instance (Table 7, instance 1); also called (setb1) or (B1)
+15 10
+2 34 3 55 5 95 9 16 4 21 6 71 0 53 8 52 1 21 7 26
+3 39 2 31 0 12 1 42 9 79 8 77 6 77 5 98 4 55 7 66
+1 19 0 83 3 34 4 92 6 54 9 79 8 62 5 37 2 64 7 43
+4 60 2 87 8 24 5 77 3 69 7 38 1 87 6 41 9 83 0 93
+8 79 9 77 2 98 4 96 3 17 0 44 7 43 6 75 1 49 5 25
+8 35 7 95 6  9 9 10 2 35 1  7 5 28 4 61 0 95 3 76
+4 28 5 59 3 16 9 43 0 46 8 50 6 52 7 27 2 59 1 91
+5  9 4 20 2 39 6 54 1 45 7 71 0 87 3 41 9 43 8 14
+1 28 5 33 0 78 3 26 2 37 7  8 8 66 6 89 9 42 4 33
+2 94 5 84 6 78 9 81 1 74 3 27 8 69 0 69 7 45 4 96
+1 31 4 24 0 20 2 17 9 25 8 81 5 76 3 87 7 32 6 18
+5 28 9 97 0 58 4 45 6 76 3 99 2 23 1 72 8 90 7 86
+5 27 9 48 8 27 7 62 4 98 6 67 3 48 0 42 1 46 2 17
+1 12 8 50 0 80 2 50 9 80 3 19 5 28 6 63 4 94 7 98
+4 61 3 55 6 37 5 14 2 50 8 79 1 41 9 72 7 18 0 75
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/la22.txt b/scalar-variable/job-shop-scheduling/data/jsplib/la22.txt
new file mode 100644
index 0000000..6eebe14
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/la22.txt
@@ -0,0 +1,20 @@
+#+++++++++++++++++++++++++++++
+# instance la22
+#+++++++++++++++++++++++++++++
+# Lawrence 15x10 instance (Table 7, instance 2); also called (setb2) or (B2)
+15 10
+9 66 5 91 4 87 2 94 7 21 3 92 1  7 0 12 8 11 6 19
+3 13 2 20 4  7 1 14 9 66 0 75 6 77 5 16 7 95 8  7
+8 77 7 20 2 34 0 15 9 88 5 89 6 53 3  6 1 45 4 76
+3 27 2 74 6 88 4 62 7 52 8 69 5  9 9 98 0 52 1 88
+4 88 6 15 1 52 2 61 7 54 0 62 8 59 5  9 3 90 9  5
+6 71 0 41 4 38 3 53 7 91 8 68 1 50 5 78 2 23 9 72
+3 95 9 36 6 66 5 52 0 45 8 30 4 23 2 25 7 17 1  6
+4 65 1  8 8 85 0 71 7 65 6 28 5 88 3 76 9 27 2 95
+9 37 1 37 4 28 3 51 8 86 2  9 6 55 0 73 7 51 5 90
+3 39 2 15 6 83 9 44 7 53 0 16 4 46 5 24 1 25 8 82
+1 72 4 48 0 87 2 66 9  5 6 54 7 39 8 35 5 95 3 60
+1 46 3 20 0 97 2 21 9 46 7 37 8 19 4 59 6 34 5 55
+5 23 3 25 6 78 1 24 0 28 7 83 8 28 9  5 2 73 4 45
+1 37 0 53 7 87 4 38 3 71 5 29 9 12 8 33 6 55 2 12
+4 90 8 17 2 49 3 83 1 40 6 23 7 65 9 27 5  7 0 48
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/la23.txt b/scalar-variable/job-shop-scheduling/data/jsplib/la23.txt
new file mode 100644
index 0000000..aa7f6ea
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/la23.txt
@@ -0,0 +1,20 @@
+#+++++++++++++++++++++++++++++
+# instance la23
+#+++++++++++++++++++++++++++++
+# Lawrence 15x10 instance (Table 7, instance 3); also called (setb3) or (B3)
+15 10
+7 84 5 58 8 77 2 44 4 97 6 89 3  5 1 58 9 96 0  9
+6 21 1 87 4 15 5 39 2 81 3 85 7 31 8 57 9 73 0 77
+0 40 5 71 8 34 9 82 3 70 6 22 4 10 7 80 2 48 1 49
+5 75 2 17 3  7 6 72 4 11 7 62 8 47 9 35 1 91 0 55
+9 20 4 12 6 71 7 67 0 64 2 94 8 15 5 50 3 75 1 90
+6 93 5 93 1 57 7 70 8 77 4 58 0 52 2 29 9  7 3 68
+7 56 0 95 8 48 4 26 2 82 1 63 9 36 3 27 6 87 5  6
+3 76 5 15 9 78 1  8 8 41 2 36 4 30 6 84 0 36 7 76
+0 75 7 13 2 81 8 29 4 54 6 82 5 88 1 78 9 40 3 13
+2  6 1 26 7 32 6 64 4 54 0 52 5 82 3  6 9 88 8 54
+8 62 2 67 5 32 0 62 7 69 3 61 1 35 4 72 9  5 6 93
+2 78 9 90 0 85 1 72 8 64 6 63 3 11 7 82 5 88 4  7
+4 28 9 11 7 50 6 88 0 44 5 31 2 27 1 66 8 49 3 35
+2 14 5 39 6 56 4 62 3 97 9 66 7 69 1  7 8 47 0 76
+1 18 8 93 7 58 6 47 3 69 9 57 2 41 5 53 4 79 0 64
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/la24.txt b/scalar-variable/job-shop-scheduling/data/jsplib/la24.txt
new file mode 100644
index 0000000..a23f1d4
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/la24.txt
@@ -0,0 +1,20 @@
+#+++++++++++++++++++++++++++++
+# instance la24
+#+++++++++++++++++++++++++++++
+# Lawrence 15x10 instance (Table 7, instance 4); also called (setb4) or (B4)
+15 10
+7  8 9 75 0 72 6 74 4 30 8 43 2 38 5 98 1 26 3 19
+6 19 8 73 3 43 0 23 1 85 4 39 5 13 9 26 2 67 7  9
+1 50 3 93 5 80 4  7 0 55 2 61 6 57 8 72 9 42 7 46
+1 68 7 43 4 99 6 60 5 68 0 91 8 11 3 96 9 11 2 72
+7 84 2 34 8 40 5  7 1 70 6 74 3 12 0 43 9 69 4 30
+8 60 0 49 4 59 5 72 9 63 1 69 7 99 6 45 3 27 2  9
+6 71 2 91 8 65 1 90 9 98 4  8 7 50 0 75 5 37 3 17
+8 62 7 90 5 98 3 31 2 91 4 38 9 72 1  9 0 72 6 49
+4 35 0 39 9 74 5 25 7 47 3 52 2 63 8 21 6 35 1 80
+9 58 0  5 3 50 8 52 1 88 6 20 2 68 5 24 4 53 7 57
+7 99 3 91 4 33 5 19 2 18 6 38 0 24 9 35 1 49 8  9
+0 68 3 60 2 77 7 10 8 60 5 15 9 72 1 18 6 90 4 18
+9 79 1 60 3 56 6 91 2 40 8 86 7 72 0 80 5 89 4 51
+4 10 2 92 5 23 6 46 8 40 7 72 3  6 1 23 0 95 9 34
+2 24 5 29 9 49 8 55 0 47 6 77 3 77 7  8 1 28 4 48
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/la25.txt b/scalar-variable/job-shop-scheduling/data/jsplib/la25.txt
new file mode 100644
index 0000000..2ca9377
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/la25.txt
@@ -0,0 +1,20 @@
+#+++++++++++++++++++++++++++++
+# instance la25
+#+++++++++++++++++++++++++++++
+# Lawrence 15x10 instance (Table 7, instance 5); also called (setb5) or (B5)
+15 10
+8 14 4 75 3 12 2 38 0 76 5 97 9 12 1 29 7 44 6 66
+5 38 3 82 2 85 4 58 6 87 9 89 0 43 1 80 7 69 8 92
+9  5 1 84 0 43 6 48 4  8 7  7 3 41 5 61 8 66 2 14
+2 42 1  8 0 96 5 19 4 59 7 97 9 73 8 43 3 74 6 41
+6 55 2 70 3 75 8 42 4 37 7 23 1 48 5  5 9 38 0  7
+8  9 2 72 7 31 0 79 5 73 3 95 4 25 6 43 9 60 1 56
+0 97 2 64 3 78 5 21 4 94 9 31 8 53 6 16 7 86 1  7
+3 86 7 85 9 63 0 61 2 65 4 30 5 32 1 33 8 44 6 59
+2 44 3 16 4 11 6 45 1 30 9 84 8 93 0 60 5 61 7 90
+7 36 8 31 4 47 6 52 0 32 5 11 2 28 9 35 3 20 1 49
+8 20 6 49 7 74 4 10 5 17 3 34 0 85 2 77 9 68 1 84
+1 85 5  7 8 71 6 59 4 76 0 17 3 29 2 17 7 48 9 13
+2 15 6 87 7 11 1 39 4 39 8 43 0 19 3 32 9 16 5 64
+6 32 2 92 5 33 8 82 1 83 7 57 9 99 4 91 3 99 0  8
+4 88 7  7 8 27 1 38 3 91 2 69 6 21 9 62 5 39 0 48
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/la26.txt b/scalar-variable/job-shop-scheduling/data/jsplib/la26.txt
new file mode 100644
index 0000000..f980b40
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/la26.txt
@@ -0,0 +1,25 @@
+#+++++++++++++++++++++++++++++
+# instance la26
+#+++++++++++++++++++++++++++++
+# Lawrence 20x10 instance (Table 8, instance 1); also called (setc1) or (C1)
+20 10
+8 52 7 26 6 71 9 16 2 34 1 21 5 95 4 21 0 53 3 55
+4 55 5 98 3 39 9 79 0 12 8 77 6 77 7 66 2 31 1 42
+5 37 4 92 2 64 6 54 1 19 7 43 0 83 3 34 9 79 8 62
+1 87 5 77 0 93 3 69 2 87 7 38 8 24 6 41 9 83 4 60
+2 98 5 25 6 75 9 77 1 49 3 17 8 79 0 44 7 43 4 96
+1  7 4 61 0 95 2 35 9 10 8 35 5 28 3 76 7 95 6  9
+5 59 9 43 0 46 4 28 6 52 3 16 2 59 1 91 8 50 7 27
+5  9 9 43 8 14 7 71 4 20 6 54 3 41 0 87 1 45 2 39
+1 28 8 66 0 78 2 37 9 42 3 26 5 33 6 89 4 33 7  8
+4 96 3 27 6 78 5 84 2 94 8 69 1 74 9 81 7 45 0 69
+4 24 7 32 9 25 2 17 3 87 8 81 5 76 6 18 1 31 0 20
+8 90 5 28 1 72 7 86 2 23 3 99 6 76 9 97 4 45 0 58
+2 17 4 98 3 48 1 46 8 27 6 67 7 62 0 42 9 48 5 27
+0 80 8 50 3 19 7 98 5 28 2 50 4 94 6 63 1 12 9 80
+9 72 0 75 4 61 8 79 6 37 2 50 5 14 3 55 7 18 1 41
+3 96 2 14 5 57 0 47 7 65 4 75 8 79 1 71 6 60 9 22
+1 31 7 47 8 58 3 32 4 44 5 58 6 34 0 33 2 69 9 51
+1 44 7 40 2 17 0 62 8 66 6 15 3 29 9 38 5  8 4 97
+2 58 3 50 4 63 9 87 0 57 6 21 7 57 8 32 1 39 5 20
+1 85 0 84 5 56 3 61 9 15 7 70 8 30 2 90 6 67 4 20
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/la27.txt b/scalar-variable/job-shop-scheduling/data/jsplib/la27.txt
new file mode 100644
index 0000000..c1a164d
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/la27.txt
@@ -0,0 +1,25 @@
+#+++++++++++++++++++++++++++++
+# instance la27
+#+++++++++++++++++++++++++++++
+# Lawrence 20x10 instance (Table 8, instance 2); also called (setc2) or (C2)
+20 10
+3 60 4 48 5 95 0 87 1 72 9  5 8 35 7 39 6 54 2 66
+7 37 6 34 0 97 5 55 2 21 3 20 4 59 9 46 8 19 1 46
+4 45 2 73 1 24 8 28 0 28 3 25 5 23 7 83 9  5 6 78
+0 53 2 12 9 12 1 37 8 33 3 71 6 55 5 29 7 87 4 38
+4 90 2 49 9 27 7 65 5  7 6 23 0 48 3 83 8 17 1 40
+3 85 4 25 2 84 6 64 9 13 1 66 7 46 8 59 0 62 5 19
+5 88 6 67 4 14 0 41 1 73 7 57 2 53 3 80 9 47 8 74
+1 78 5 64 4 63 6 46 3 84 0 84 8 28 9 52 7 26 2 41
+1 11 0 64 6 97 9 38 2 17 4 85 5 73 3 10 8 95 7 67
+3 93 2 95 7 43 1 65 8 32 0 59 6 85 5 46 9 85 4 60
+2 61 3 41 5 49 4 23 0 66 7 49 8 70 9 99 1 90 6 17
+4 13 7  7 1 98 8 57 0 73 3 73 2 68 5 40 9 98 6  9
+9 86 6 76 4 14 3 41 1 85 0 37 8 19 2 17 7 54 5 79
+1 40 2 53 7 97 5 87 8 96 4 84 3 16 6 66 9 52 0 95
+6 33 1 33 3 87 0 18 2 55 8 13 4 77 7 60 9 42 5 74
+7 92 5 91 8 79 2 54 4 69 6 79 3 33 1 61 9 39 0 16
+6 82 1 41 4 28 5 64 2 78 3 76 7  6 8 49 9 47 0 58
+0 52 5 42 8 24 9 91 3 47 6 88 4 91 7 52 2 28 1 35
+5 82 2 76 3 86 6 93 4 84 7 38 8 95 9 37 1 21 0 23
+9 77 4  8 6 42 7 64 0 70 2 45 8 45 5 28 3 67 1 86
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/la28.txt b/scalar-variable/job-shop-scheduling/data/jsplib/la28.txt
new file mode 100644
index 0000000..92af3c9
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/la28.txt
@@ -0,0 +1,25 @@
+#+++++++++++++++++++++++++++++
+# instance la28
+#+++++++++++++++++++++++++++++
+# Lawrence 20x10 instance (Table 8, instance 3); also called (setc3) or (C3)
+20 10
+8 32 1 81 4 55 7 40 0  6 5 19 9 81 3 37 2 40 6  9
+2 70 3 55 7 21 4 64 1 46 8 25 9 65 0 77 5 65 6 15
+7 84 4 89 3 24 1 44 2 85 8 31 9 29 6 83 5 37 0 40
+4 80 5 59 0  8 2 30 6 77 3 38 1 80 7 56 9 41 8 97
+6 40 2 71 0 91 7  7 9 59 8 80 3 50 5 56 1 17 4 88
+7 36 9 10 0 45 6  9 4 54 8 96 2  8 5 77 1 29 3 58
+6 99 8 86 3 92 0 28 1 98 4 70 5 87 9 96 2 73 7 27
+1 95 3 85 5 56 4 52 0 59 2 41 6 81 8 39 9 32 7 92
+1  7 7 69 4 93 6 27 5 22 0 88 8 45 3 60 9 49 2 12
+7 33 2 61 8 44 5 26 1 84 6 82 3 68 0 21 9 71 4 99
+8 43 0 72 4 30 5 98 9 75 1 26 7  8 6 74 3 19 2 38
+6 19 2 67 8 73 1 85 9 26 4 39 7  9 0 23 5 13 3 43
+8 72 7 46 5 80 3 93 2 61 4  7 9 42 1 50 0 55 6 57
+4 99 0 91 9 11 5 68 7 43 3 96 2 72 8 11 6 60 1 68
+9 69 0 43 3 12 8 40 1 70 6 74 2 34 5  7 4 30 7 84
+7 99 3 27 4 59 5 72 2  9 6 45 0 49 9 63 1 69 8 60
+0 75 3 17 2 91 7 50 8 65 5 37 9 98 1 90 6 71 4  8
+9 72 1  9 3 31 6 49 2 91 8 62 7 90 0 72 5 98 4 38
+4 35 2 63 5 25 6 35 8 21 7 47 3 52 1 80 0 39 9 74
+2 68 5 24 9 58 8 52 0  5 6 20 3 50 7 57 1 88 4 53
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/la29.txt b/scalar-variable/job-shop-scheduling/data/jsplib/la29.txt
new file mode 100644
index 0000000..017077c
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/la29.txt
@@ -0,0 +1,25 @@
+#+++++++++++++++++++++++++++++
+# instance la29
+#+++++++++++++++++++++++++++++
+# Lawrence 20x10 instance (Table 8, instance 4); also called (setc4) or (C4)
+20 10
+8 14 2 38 7 44 0 76 5 97 3 12 4 75 6 66 9 12 1 29
+0 43 2 85 3 82 5 38 4 58 9 89 8 92 6 87 7 69 1 80
+3 41 7  7 9  5 0 43 2 14 4  8 5 61 1 84 8 66 6 48
+2 42 3 74 4 59 6 41 1  8 9 73 8 43 0 96 5 19 7 97
+7 23 8 42 4 37 6 55 0  7 5  5 2 70 9 38 3 75 1 48
+8  9 6 43 7 31 4 25 5 73 3 95 0 79 2 72 9 60 1 56
+1  7 5 21 8 53 6 16 4 94 0 97 3 78 2 64 7 86 9 31
+2 65 6 59 7 85 1 33 4 30 8 44 0 61 3 86 9 63 5 32
+6 45 2 44 5 61 8 93 1 30 7 90 9 84 4 11 3 16 0 60
+4 47 7 36 8 31 1 49 3 20 2 28 6 52 9 35 5 11 0 32
+2 77 4 10 9 68 5 17 0 85 1 84 8 20 6 49 7 74 3 34
+0 17 5  7 1 85 3 29 2 17 4 76 6 59 8 71 9 13 7 48
+6 87 4 39 8 43 7 11 2 15 3 32 5 64 0 19 1 39 9 16
+5 33 3 99 6 32 4 91 8 82 2 92 9 99 7 57 1 83 0  8
+3 91 5 39 2 69 8 27 7  7 6 21 1 38 9 62 4 88 0 48
+2 67 7 80 3 24 0 88 4 18 1 44 8 45 9 64 5 80 6 38
+9 59 3 72 6 47 4 40 7 21 5 43 0 51 8 52 1 24 2 15
+3 70 2 31 6 20 8 76 1 40 7 43 0 32 5 88 9  5 4 77
+4 47 5 64 9 85 3 49 7 58 1 26 0 32 8 80 2 14 6 94
+5 59 2 96 0  5 7 79 8 34 4 75 3 26 6  9 9 23 1 11
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/la30.txt b/scalar-variable/job-shop-scheduling/data/jsplib/la30.txt
new file mode 100644
index 0000000..8b92fb9
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/la30.txt
@@ -0,0 +1,25 @@
+#+++++++++++++++++++++++++++++
+# instance la30
+#+++++++++++++++++++++++++++++
+# Lawrence 20x10 instance (Table 8, instance 5); also called (setc5) or (C5)
+20 10
+6 32 3 16 1 33 8 12 7 70 4 10 9 75 0 82 5 88 2 20
+8 39 4 81 3 91 5 56 9 69 1 45 6 59 0 86 2 36 7 68
+3 84 2 57 7 41 5 73 4 81 0 88 8 38 9 17 6 83 1  5
+4 20 5  6 2 15 8 19 1 30 0 94 6 45 7 17 3 18 9 88
+9 24 6 49 5 16 4 11 3 60 7  5 8 63 1 25 2 15 0 45
+1 86 8 50 2 77 6 54 9 48 0 93 3 32 7 92 5 45 4 71
+5 86 6 90 3 78 9 88 2 57 0 32 7 57 8 86 4 71 1 39
+2 59 3 18 9 31 4 41 7 20 5 83 8 65 0 54 6 94 1 69
+3 47 4 79 6 76 0 59 1 72 2  8 9 30 5 73 7 57 8 84
+0 59 2 89 4 10 7 45 3  8 5 54 6 88 8 20 9  7 1 62
+5 63 6  9 4 77 3 37 2  5 8 13 9 79 1 24 7 10 0 82
+0 74 1 32 2 61 7 53 4 92 9 20 8 10 3  5 6 45 5 23
+2 85 9 51 0 61 5 99 4 37 6 94 1 98 8 65 3 33 7 75
+0 51 3 24 5  8 6 30 7 12 8 23 2  7 4 17 9 35 1 81
+1 71 5 42 8 68 2 31 6 29 3 63 4 65 9 70 7 27 0 93
+1 28 5 38 4 51 7 70 2 33 8 78 9 45 3 90 6 54 0 72
+0 18 2 90 4 25 6 92 8 85 5 35 7 29 1 81 9 80 3 59
+5 67 2 96 1 38 4 86 0 97 3 94 7 86 6 35 9 82 8 45
+2 92 8 51 4 59 6 52 5  8 9 70 1 75 3 54 7 60 0 33
+3 98 7 80 5 78 0 82 2  7 9 89 1 69 4 51 8 79 6 62
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/la31.txt b/scalar-variable/job-shop-scheduling/data/jsplib/la31.txt
new file mode 100644
index 0000000..1853bd3
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/la31.txt
@@ -0,0 +1,35 @@
+#+++++++++++++++++++++++++++++
+# instance la31
+#+++++++++++++++++++++++++++++
+# Lawrence 30x10 instance (Table 9, instance 1); also called (setd1) or (D1)
+30 10
+4 21 7 26 9 16 2 34 3 55 8 52 5 95 6 71 1 21 0 53
+8 77 5 98 1 42 7 66 2 31 3 39 6 77 9 79 4 55 0 12
+2 64 4 92 3 34 1 19 8 62 6 54 7 43 0 83 9 79 5 37
+0 93 8 24 3 69 7 38 5 77 2 87 4 60 6 41 1 87 9 83
+9 77 0 44 4 96 8 79 6 75 2 98 5 25 3 17 7 43 1 49
+3 76 2 35 5 28 0 95 7 95 4 61 8 35 1  7 6  9 9 10
+1 91 7 27 8 50 3 16 4 28 5 59 6 52 0 46 2 59 9 43
+1 45 7 71 2 39 0 87 8 14 6 54 3 41 9 43 5  9 4 20
+2 37 3 26 4 33 9 42 0 78 6 89 7  8 8 66 1 28 5 33
+1 74 0 69 5 84 3 27 9 81 7 45 8 69 2 94 6 78 4 96
+5 76 7 32 6 18 0 20 3 87 2 17 9 25 4 24 1 31 8 81
+9 97 8 90 5 28 7 86 0 58 1 72 2 23 6 76 3 99 4 45
+9 48 5 27 6 67 7 62 4 98 0 42 1 46 8 27 3 48 2 17
+9 80 3 19 5 28 1 12 4 94 6 63 7 98 8 50 0 80 2 50
+2 50 1 41 4 61 8 79 5 14 9 72 7 18 3 55 6 37 0 75
+9 22 5 57 4 75 2 14 7 65 3 96 1 71 0 47 8 79 6 60
+3 32 2 69 4 44 1 31 9 51 0 33 6 34 5 58 7 47 8 58
+8 66 7 40 2 17 0 62 9 38 5  8 6 15 3 29 1 44 4 97
+3 50 2 58 6 21 4 63 7 57 8 32 5 20 9 87 0 57 1 39
+4 20 6 67 1 85 2 90 7 70 0 84 8 30 5 56 3 61 9 15
+6 29 0 82 4 18 3 38 7 21 8 50 1 23 5 84 2 45 9 41
+3 54 9 37 6 62 5 16 0 52 8 57 4 54 2 38 7 74 1 52
+4 79 1 61 8 11 0 81 7 89 6 89 5 57 3 68 9 81 2 30
+9 24 1 66 4 32 3 33 8  8 2 20 6 84 0 91 7 55 5 20
+3 54 2 64 6 83 9 40 7  8 0  7 4 19 5 56 1 39 8  7
+1  6 4 74 0 63 2 64 9 15 6 42 7 98 8 61 5 40 3 91
+1 80 3 75 0 26 2 87 9 22 7 39 8 24 4 75 6 44 5  6
+5  8 3 79 6 61 1 15 0 12 7 43 8 26 9 22 2 20 4 80
+1 36 0 63 7 10 4 22 3 96 5 40 9  5 8 18 6 33 2 62
+4  8 8 15 2 64 3 95 1 96 6 38 7 18 9 23 5 64 0 89
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/la32.txt b/scalar-variable/job-shop-scheduling/data/jsplib/la32.txt
new file mode 100644
index 0000000..60660aa
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/la32.txt
@@ -0,0 +1,35 @@
+#+++++++++++++++++++++++++++++
+# instance la32
+#+++++++++++++++++++++++++++++
+# Lawrence 30x10 instance (Table 9, instance 2); also called (setd2) or (D2)
+30 10
+6 89 1 58 4 97 2 44 8 77 3  5 0  9 5 58 9 96 7 84
+7 31 2 81 9 73 4 15 1 87 5 39 8 57 0 77 3 85 6 21
+2 48 5 71 0 40 3 70 1 49 6 22 4 10 8 34 7 80 9 82
+4 11 6 72 7 62 0 55 2 17 5 75 3  7 1 91 9 35 8 47
+0 64 6 71 4 12 1 90 2 94 3 75 9 20 8 15 5 50 7 67
+2 29 6 93 3 68 5 93 1 57 8 77 0 52 9  7 4 58 7 70
+4 26 3 27 1 63 5  6 6 87 7 56 8 48 9 36 0 95 2 82
+1  8 7 76 3 76 4 30 6 84 9 78 8 41 0 36 2 36 5 15
+3 13 8 29 0 75 2 81 1 78 5 88 4 54 9 40 7 13 6 82
+0 52 2  6 3  6 5 82 6 64 9 88 8 54 4 54 7 32 1 26
+8 62 1 35 4 72 7 69 0 62 5 32 9  5 3 61 2 67 6 93
+2 78 3 11 7 82 4  7 1 72 8 64 9 90 0 85 5 88 6 63
+7 50 4 28 3 35 1 66 2 27 8 49 9 11 6 88 5 31 0 44
+4 62 5 39 0 76 2 14 6 56 3 97 1  7 7 69 9 66 8 47
+6 47 2 41 0 64 7 58 9 57 8 93 3 69 5 53 1 18 4 79
+7 76 9 81 0 76 6 61 4 77 8 26 2 74 5 22 1 58 3 78
+6 30 8 72 3 43 0 65 1 16 4 92 5 95 9 29 2 99 7 64
+1 35 3 74 5 16 4 85 0  7 2 81 6 86 8 61 9 35 7 34
+1 97 7 43 4 72 6 88 5 17 0 43 8 94 3 64 9 22 2 42
+7 99 2 84 8 99 5 98 1 20 6 31 3 74 0 92 9 23 4 89
+8 32 0  6 4 55 5 19 9 81 1 81 7 40 6  9 3 37 2 40
+6 15 2 70 8 25 1 46 9 65 4 64 7 21 0 77 5 65 3 55
+8 31 7 84 5 37 3 24 2 85 4 89 9 29 1 44 0 40 6 83
+4 80 0  8 9 41 5 59 7 56 3 38 2 30 8 97 6 77 1 80
+9 59 0 91 3 50 8 80 1 17 6 40 2 71 5 56 4 88 7  7
+7 36 3 58 4 54 5 77 2  8 6  9 0 45 9 10 1 29 8 96
+0 28 3 92 2 73 7 27 8 86 5 87 9 96 1 98 6 99 4 70
+9 32 1 95 3 85 6 81 2 41 8 39 7 92 0 59 5 56 4 52
+4 93 2 12 5 22 6 27 8 45 7 69 3 60 1  7 0 88 9 49
+2 61 5 26 9 71 8 44 0 21 6 82 3 68 7 33 1 84 4 99
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/la33.txt b/scalar-variable/job-shop-scheduling/data/jsplib/la33.txt
new file mode 100644
index 0000000..0c2e742
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/la33.txt
@@ -0,0 +1,35 @@
+#+++++++++++++++++++++++++++++
+# instance la33
+#+++++++++++++++++++++++++++++
+# Lawrence 30x10 instance (Table 9, instance 3); also called (setd3) or (D3)
+30 10
+2 38 4 75 9 12 5 97 0 76 1 29 8 14 6 66 7 44 3 12
+0 43 5 38 1 80 3 82 2 85 4 58 6 87 8 92 9 89 7 69
+6 48 4  8 8 66 7  7 2 14 3 41 5 61 0 43 1 84 9  5
+5 19 3 74 6 41 4 59 8 43 2 42 9 73 7 97 1  8 0 96
+3 75 5  5 2 70 8 42 7 23 6 55 1 48 9 38 4 37 0  7
+2 72 7 31 3 95 0 79 4 25 1 56 8  9 9 60 5 73 6 43
+9 31 3 78 6 16 4 94 7 86 5 21 0 97 8 53 1  7 2 64
+3 86 2 65 6 59 8 44 1 33 7 85 0 61 5 32 9 63 4 30
+4 11 5 61 9 84 3 16 7 90 1 30 0 60 8 93 2 44 6 45
+5 11 2 28 0 32 7 36 8 31 4 47 3 20 6 52 9 35 1 49
+5 17 3 34 6 49 1 84 0 85 8 20 7 74 9 68 4 10 2 77
+8 71 5  7 3 29 1 85 4 76 6 59 2 17 0 17 9 13 7 48
+1 39 9 16 4 39 6 87 7 11 3 32 2 15 0 19 5 64 8 43
+5 33 8 82 2 92 1 83 6 32 3 99 9 99 4 91 0  8 7 57
+7  7 0 48 9 62 4 88 6 21 5 39 8 27 3 91 1 38 2 69
+9 64 8 45 3 24 7 80 2 67 4 18 6 38 0 88 5 80 1 44
+2 15 3 72 4 40 7 21 8 52 0 51 9 59 1 24 6 47 5 43
+4 77 7 43 1 40 2 31 8 76 6 20 5 88 3 70 9  5 0 32
+2 14 7 58 9 85 5 64 1 26 6 94 0 32 3 49 8 80 4 47
+9 23 1 11 8 34 4 75 7 79 3 26 2 96 0  5 6  9 5 59
+0 75 2 20 8 10 3 66 6 43 7 37 1  9 9 83 4 68 5 52
+8 54 1 26 4 79 7 88 6 84 0  6 2 54 9 59 3 28 5 42
+4 56 9 29 3 36 0 40 6 86 8 68 2 69 7 23 5 62 1 16
+7 53 1  5 6 17 9 59 2 59 8 78 3 64 0 82 4 13 5 12
+9  7 6 62 7 90 5 83 1 85 3 69 0 16 4 81 2 58 8 66
+7 24 2 65 1 69 5 42 9 82 6 82 0 83 3 46 8 72 4 33
+1 10 8 27 7 43 5 20 4 71 9 65 2 73 6 99 0 24 3 64
+9 35 3 92 0 38 5 35 7 30 8 45 2  8 4 82 1 34 6 21
+5 23 7 84 9  7 4 85 8 60 1 15 2 52 6 94 3 83 0  6
+2 70 6 29 8 27 9 80 4  6 7 39 1 79 0 28 3 66 5 66
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/la34.txt b/scalar-variable/job-shop-scheduling/data/jsplib/la34.txt
new file mode 100644
index 0000000..bdb38ed
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/la34.txt
@@ -0,0 +1,35 @@
+#+++++++++++++++++++++++++++++
+# instance la34
+#+++++++++++++++++++++++++++++
+# Lawrence 30x10 instance (Table 9, instance 4); also called (setd4) or (D4)
+30 10
+2 51 7 59 1 35 5 73 9 65 0 27 6 13 3 81 8 32 4 74
+4 64 7 33 5 75 2 33 8 10 0 28 3 38 6 53 9 49 1 55
+6 83 1 23 2 72 3  7 9 72 0  6 4 39 5 52 8 90 7 21
+3 82 1 23 2 93 4 78 6 88 7 53 9 28 8 65 5 21 0 61
+4 41 6 12 9 12 3 77 1 70 7 24 0 81 5 73 2 62 8  6
+4 98 3 28 6 42 9 72 0 15 8 15 5 94 2 33 1 51 7 99
+0 32 8 22 9 96 4 15 6 78 3 31 5  7 1 94 2 23 7 86
+7 93 2 97 3 43 5 73 0 24 8 68 9 88 1 42 4 35 6 72
+2 14 0 44 8 13 5 67 1 63 3 49 7  5 4 17 6 85 9 66
+7 82 9 15 3 72 4 26 0  8 1 68 6 21 8 45 2 99 5 27
+4 93 6 23 0 51 8 54 3 49 1 96 2 56 9 36 5 53 7 52
+8 60 0 14 4 70 9 55 1 23 5 83 3 38 2 24 7 37 6 48
+0 62 7 15 8 69 9 23 1 82 6 26 4 45 5 33 3 12 2 37
+6 72 1  9 7 15 5 28 8 92 9 12 0 59 3 64 4 87 2 73
+0 50 1 14 7 90 5 46 3 71 4 48 2 80 9 61 8 24 6 44
+0 22 9 94 5 16 3 73 2 54 8 54 4 46 1 97 6 61 7 75
+9 55 3 67 6 77 4 30 7  6 1 32 8 47 5 93 2  6 0 40
+1 30 3 98 7 79 0 22 6 79 2  7 8 36 9 36 5  9 4 92
+8 37 7 72 2 52 4 31 1 82 9 54 5  7 6 82 3 73 0 49
+1 73 3 83 7 45 2 76 4 43 9 29 0 35 5 92 8 39 6 28
+2 58 0 26 1 48 8 52 7 34 6 96 5 70 4 98 3 80 9 94
+1 70 8 23 5 26 4 14 6 90 2 93 3 21 0 42 7 18 9 36
+4 28 6 76 7 25 0 17 1 84 2 67 8 87 3 43 9 88 5 84
+7 30 3 91 8 52 4 80 0 21 5  8 9 37 2 15 6 12 1 92
+1 28 4  7 7 46 6 92 2 77 3 15 9 69 8 54 0 47 5 39
+9 50 5 44 2 64 8 38 4 93 6 33 7 75 0 41 1 24 3  5
+7 94 0 17 6 87 2 21 8 92 9 28 1 61 4 63 3 34 5 77
+3 72 8 98 9  5 4 28 2  9 5 95 6 64 1 43 0 50 7 96
+0 85 2 85 8 39 1 98 7 24 3 71 5 60 4 55 9 22 6 35
+3 78 6 49 2 46 1 11 0 90 5 20 9 34 7  6 4 70 8 74
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/la35.txt b/scalar-variable/job-shop-scheduling/data/jsplib/la35.txt
new file mode 100644
index 0000000..edb22c8
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/la35.txt
@@ -0,0 +1,35 @@
+#+++++++++++++++++++++++++++++
+# instance la35
+#+++++++++++++++++++++++++++++
+# Lawrence 30x10 instance (Table 9, instance 5); also called (setd5) or (D5)
+30 10
+0 66 2 84 3 26 7 29 9 94 6 98 8  7 5 98 1 45 4 43
+3 32 0 97 6 55 2 88 8 93 9 88 1 20 4 50 7 17 5  5
+4 43 3 68 8 47 9 68 1 57 6 20 5 81 2 60 7 94 0 62
+1 57 5 40 0 78 6  9 2 49 9 17 3 32 4 30 8 87 7 77
+0 52 4 30 3 48 5 48 1 26 9 17 6 93 8 97 7 49 2 89
+7 95 0 33 1  5 6 17 5 70 3 57 4 34 2 61 8 62 9 39
+7 97 5 92 1 31 8  5 2 79 4  5 3 67 0  5 9 78 6 60
+2 79 4  6 7 20 8 45 6 34 3 24 9 26 5 68 1 16 0 46
+7 58 9 50 2 19 8 93 6 49 3 25 5 85 4 50 0 93 1 26
+9 81 6 71 5  7 1 39 2 16 8 42 0 71 4 84 3 56 7 99
+8  9 0 86 9  6 3 71 6 97 5 85 4 16 2 42 7 81 1 81
+4 72 3 24 0 30 8 56 2 43 1 61 7 82 6 40 5 59 9 43
+9 43 1 13 6 70 7 93 0 95 8 12 4 15 2 78 5 97 3 14
+0 14 6 26 1 71 3 46 8 80 5 31 4 37 9 27 7 92 2 67
+2 12 0 43 5 96 6  7 3 45 7 20 1 13 9 29 4 60 8 33
+1 78 5 50 6 84 0 42 8 84 4 30 9 76 2 57 7 87 3 59
+4 49 7 50 1 15 8 13 0 93 6 50 9 32 5 59 3 10 2 35
+1 25 0 47 7 60 8 33 4 53 5 37 9 73 2 22 3 87 6 79
+0 84 6 83 1 71 5 68 9 89 8 11 3 60 4 50 2 33 7 97
+1 14 0 38 6 88 5  5 4 77 7 92 8 24 2 73 9 52 3 71
+7 62 9 19 6 38 3 15 8 64 2 64 4  8 1 61 0 19 5 33
+2 33 5 46 4 74 0 56 6 84 9 83 8 19 7  8 3 32 1 97
+4 50 3 71 6 50 2 97 9  8 0 17 7 19 8 92 5 54 1 52
+8 32 1 79 3 97 5 38 9 49 4 76 6 76 0 56 2 78 7 54
+5 13 3  5 2 25 0 86 1 95 9 28 6 78 8 24 7 10 4 39
+7 48 2 59 0 20 9  7 5 31 6 97 1 89 4 32 3 25 8 41
+5 87 0 18 9 48 2 43 1 30 6 97 7 47 8 65 3 69 4 27
+6 71 5 20 8 20 1 78 3 39 0 17 7 50 2 44 9 42 4 38
+0 50 9 42 3 72 5  7 1 77 7 58 4 78 2 89 6 70 8 36
+3 32 9 95 2 13 0 73 6 97 8 24 4 49 5 57 1 68 7 94
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/la36.txt b/scalar-variable/job-shop-scheduling/data/jsplib/la36.txt
new file mode 100644
index 0000000..b99b623
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/la36.txt
@@ -0,0 +1,20 @@
+#+++++++++++++++++++++++++++++
+# instance la36
+#+++++++++++++++++++++++++++++
+# Lawrence 15x15 instance (Table 10, instance 1); also called (seti1) or (I1)
+15 15
+ 4 21  3 55  6 71 14 98 10 12  2 34  9 16  1 21  0 53  7 26  8 52  5 95 12 31 11 42 13 39
+11 54  4 83  1 77  7 64  8 34 14 79 12 43  0 55  3 77  6 19  9 37  5 79 10 92 13 62  2 66
+ 9 83  5 77  2 87  7 38  4 60 12 98  0 93 13 17  6 41 10 44  3 69 11 49  8 24  1 87 14 25
+ 5 77  0 96  9 28  6  7  4 95 13 35  7 35  8 76 11  9 12 95  2 43  1 75 10 61 14 10  3 79
+10 87  4 28  8 50  2 59  0 46 11 45 14  9  9 43  6 52  7 27  1 91 13 41  3 16  5 59 12 39
+ 0 20  2 71  4 78 13 66  3 14 12  8 14 42  6 28  1 54  9 33 11 89  8 26  7 37 10 33  5 43
+ 8 69  4 96 12 17  0 69  7 45 11 31  6 78 10 20  3 27 13 87  1 74  5 84 14 76  2 94  9 81
+ 4 58 13 90 11 76  3 81  7 23  9 28  1 18  2 32 12 86  8 99 14 97  0 24 10 45  6 72  5 25
+ 5 27  1 46  6 67  8 27 13 19 10 80  2 17  3 48  7 62 11 12 14 28  4 98  0 42  9 48 12 50
+11 37  5 80  4 75  8 55  7 50  0 94  9 14  6 41 14 72  3 50 10 61 13 79  2 98 12 18  1 63
+ 7 65  3 96  0 47  4 75 12 69 14 58 10 33  1 71  9 22 13 32  5 57  8 79  2 14 11 31  6 60
+ 1 34  2 47  3 58  5 51  4 62  6 44  9  8  7 17 10 97  8 29 11 15 13 66 12 40  0 44 14 38
+ 3 50  7 57 13 61  5 20 11 85 12 90  2 58  4 63 10 84  1 39  9 87  6 21 14 56  8 32  0 57
+ 9 84  7 45  5 15 14 41 10 18  4 82 11 29  2 70  1 67  3 30 13 50  6 23  0 20 12 21  8 38
+ 9 37 10 81 11 61 14 57  8 57  0 52  7 74  6 62 12 30  1 52  2 38 13 68  4 54  3 54  5 16
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/la37.txt b/scalar-variable/job-shop-scheduling/data/jsplib/la37.txt
new file mode 100644
index 0000000..348599d
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/la37.txt
@@ -0,0 +1,20 @@
+#+++++++++++++++++++++++++++++
+# instance la37
+#+++++++++++++++++++++++++++++
+# Lawrence 15x15 instance (Table 10, instance 2); also called (seti2) or (I2)
+15 15
+ 5 19  6 64 11 73  9 13  2 84 14 88  3 85 10 41 12 53 13 80  1 66  7 46  8 59  4 25  0 62
+ 1 67  3 74  7 41  2 57 14 52  0 14  9 64  8 84  6 78  5 47 13 28  4 84 10 63 12 26 11 46
+ 6 97  8 95  0 64  9 38 10 59 12 95  2 17 11 65 13 93  3 10  5 73  1 11  4 85 14 46  7 67
+10 23 12 49  3 32  4 66  2 43  0 60  8 41  7 61 13 70  9 49 11 17  6 90  1 85 14 99  5 85
+ 9 98  8 57  3 73  6  9  0 73  7  7  1 98  4 13 13 41  5 40 11 85 10 37  2 68 14 79 12 17
+11 66  7 53  5 86  6 40  0 14  3 19 13 96  4 95  2 54 10 84 12 97  8 16 14 52  1 76  9 87
+ 4 77  2 55  9 42  5 74 14 91 13 33 10 16 12 54  0 18  3 87  7 60  8 13  6 33  1 33 11 61
+ 6 41  5 39 11 82  9 64 14 47 10 28  7 78 13 49  1 79  4 58  2 92  3 79 12  6  0 69  8 76
+11 21  5 42  9 91  2 28  0 52  6 88 12 76 13 86 10 23  1 35  7 52  4 91  3 47 14 82  8 24
+11 42  1 93  3 95 13 45  9 28 14 77  0 84 10  8  7 45  4 70  5 37  6 86 12 64  8 67  2 38
+ 4 97 12 81  1 58  7 84  5 58  0  9 11 87  3  5  2 44 13 85  6 89 10 77  9 96 14 39  8 77
+12 80  1 21 10 10  5 73  8 70  6 49  2 31 13 34  4 40 11 22  0 15 14 82  3 57  9 71  7 48
+ 2 17  7 62  5 75  9 35  1 91 14 50  3  7 10 64 13 75 12 94  0 55  6 72  8 47  4 11 11 90
+11 93  6 57  1 71 12 70  9 93  5 20  3 15 13 77 10 58  0 12  2 67  8 68 14  7  7 29  4 52
+13 76  3 27  4 26  9 36 11  8 10 36  0 95  8 48  2 82  6 87  5  6  1 63  7 56 12 36 14 15
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/la38.txt b/scalar-variable/job-shop-scheduling/data/jsplib/la38.txt
new file mode 100644
index 0000000..9159f8f
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/la38.txt
@@ -0,0 +1,20 @@
+#+++++++++++++++++++++++++++++
+# instance la38
+#+++++++++++++++++++++++++++++
+# Lawrence 15x15 instance (Table 10, instance 3); also called (seti3) or (I3)
+15 15
+ 1 26 12 67  0 72  6 74 14 13  8 43  4 30  3 19 10 23 11 85  5 98 13 43  2 38  7  8  9 75
+14 42  0 39  4 55 12 46  1 19  8 93  9 80  5 26 10  7  6 50 11 57  3 73  2  9  7 61 13 72
+ 3 96  4 99 12 34  6 60  7 43 14  7 13 12  8 11 11 70 10 43  0 91  1 68  9 11  5 68  2 72
+14 63 11 45  4 49  1 74  8 27  0 30  9 72  7  9 12 99 13 60  5 69  6 69  2 84  3 40 10 59
+ 2 91  0 75  9 98  3 17 10 72 13 31 11  9 14 98  7 50  5 37  4  8  8 65  1 90 12 91  6 71
+11 35  6 80  4 39  3 62 14 74  5 72 10 35  9 25  1 49  8 52  7 63  2 90 13 21 12 47  0 38
+14 19  7 57 10 24 13 91  3 50  0  5 11 49 12 18  9 58  5 24  8 52  1 88  2 68  6 20  4 53
+ 7 77 14 72  5 35 11 90  4 68  6 18  3  9  0 33  8 60 10 18 12 10 13 60  1 38  2 99  9 15
+13  6  8 86  2 40  9 79 12 92 11 23  5 89 10 95  6 91  7 72  0 80  1 60  3 56  4 51 14 23
+ 1 46  6 28  5 34 11 77  4 47  0 10 14 49  8 77 10 48  7 24 12  8  2 72 13 55  9 29  3 40
+10 22  4 89 12 79  0  7  9 15  1  6 11 30  6 38  5 11  8 52  3 20  7  5 14  9  2 20 13 28
+ 5 73 14 56  2 37  3 22 13 25  6 58  1  8  7 93  4 88  8 17 12  9 11 69 10 71  9 85  0 55
+ 9 85 14 58  3 46  8 64  2 49  6 37  1 33  4 30  5 26  0 20 13 74 10 77 12 99 11 56  7 21
+10 17  3 24  4 89  5 15 11 60  1 42  8 98  2 64 13 92  0 63  7 52 12 54  6 75 14 23  9 38
+ 3  8  5 17 11 56  7 93 14 26  9 62  6  7 10 88  0 97  1  7  2 43  8 29 13 35 12 87  4 57
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/la39.txt b/scalar-variable/job-shop-scheduling/data/jsplib/la39.txt
new file mode 100644
index 0000000..d4067a8
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/la39.txt
@@ -0,0 +1,20 @@
+#+++++++++++++++++++++++++++++
+# instance la39
+#+++++++++++++++++++++++++++++
+# Lawrence 15x15 instance (Table 10, instance 4); also called (seti4) or (I4)
+15 15
+10 51 14 43  7 80  4 18  6 38  3 24  2 67 12 15 11 24 13 72  8 45  5 80  9 64  1 44  0 88
+ 6 40  9 88 10 77  5 59 11 20  3 52  8 70  0 40  4 32 13 76 12 43  7 31  2 21 14  5  1 47
+ 0 32  3 49 10  5  5 64  7 58  8 80  6 94 11 11  1 26 13 26 14 59  9 85  4 47 12 96  2 14
+ 5 23  6  9  0 75 12 37 11 43  2 79  4 75  3 34  7 20 13 10 14 83 10 68  9 52  8 66  1  9
+12 69  9 59  3 28 14 62 13 36  1 26  6 84 11 16  8 54  5 42  2 54  0  6 10 40  7 88  4 79
+13 78 12 53 11 17  5 29  4 82  2 23  9 12  8 64  1 86  7 59  6  5  3 68 14 59 10 13  0 56
+10 83 13 46  9  7 12 65 11 69  6 62  0 16  2 58  8 66  5 83  7 90 14 42  4 81  3 69  1 85
+ 7 73 10 71  8 64  6 10  9 20 11 99  4 24 14 65  5 82  3 72 12 43  1 82 13 27  2 24  0 33
+ 4 82  1 34  3 92  2  8  0 38  8 45  6 21  5 35 12 52  9 35 11 15 14 23 10  6 13 83  7 30
+ 2 84  5  7  9 66 10  6  4 28 13 27  6 79  7 70  0 85  1 94  3 60 14 80 12 39  8 66 11 29
+ 3 44  6 58 13 14  8 65  1 72  5 14 12 52  4 21  9 25  0  5 11 51  7 61 14 55 10 42  2 36
+14 43 10 72  5 78 11 12 12 17  0 46  9 27  6 51  2 63  1 79  8 79  7 91  4 49 13 26  3 93
+ 7 49  0 49  4 71  5 78  9 44 10 41 12 91 13 84  8 91  6 21 11 47 14 28  3 61  2 70  1 93
+ 3 25  4 85  0 66  2 45 10 95 12 21  8 84  5 24  9 53  7 67  6 91 11 11 13 32  1 30 14 89
+ 3 92  7 93  0 99  1 40 10 37 12 69  5 66  6 57 14 22  9 44  8 73 13 97 11 18  2 69  4 41
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/la40.txt b/scalar-variable/job-shop-scheduling/data/jsplib/la40.txt
new file mode 100644
index 0000000..795eef4
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/la40.txt
@@ -0,0 +1,20 @@
+#+++++++++++++++++++++++++++++
+# instance la40
+#+++++++++++++++++++++++++++++
+# Lawrence 15x15 instance (Table 10, instance 5); also called (seti5) or (I5)
+15 15
+ 9 65 10 28  4 74 12 33  2 51 14 75  5 73  8 32  6 13  3 81  1 35  7 59 13 38 11 55  0 27
+ 0 64  1 53 11 83  2 33  4  6  9 52 14 72  8  7 13 90 12 21  6 23  3 10 10 39  5 49  7 72
+14 73  3 82  1 23 12 62  6 88  5 21  8 65 11 70  7 53 10 81  2 93 13 77  0 61  9 28  4 78
+ 1 12  6 51  7 33  4 15 14 72 10 98  9 94  5 12 11 42  2 24 13 15  8 28  3  6 12 99  0 41
+12 97  5  7  9 96  4 15 14 73 13 43  0 32  8 22 11 42  1 94  2 23  7 86  6 78 10 24  3 31
+ 1 72  5 88  2 93 13 13  4 44 14 66  6 63  7 14  9 67 10 17 11 85  0 35  3 68 12  5  8 49
+ 9 15  7 82  6 21 14 53  3 72 13 49  2 99  4 26 12 56  8 45  1 68 10 51  0  8  5 27 11 96
+ 3 54  7 24  4 14  8 38  5 36  2 52 14 55 12 37 11 48  0 93 13 60 10 70  1 23  6 23  9 83
+ 3 12  8 69  6 26  9 23 14 28  1 82  5 33  4 45 13 64  7 15 11  9 12 73 10 59  2 37  0 62
+ 0 87  5 12  7 80  4 50 10 48 12 90  1 72 13 24  6 14  8 71 11 44  9 46  2 15 14 61  3 92
+ 2 54  0 22  6 61  4 46  3 73  5 16 12  6  9 94 14 93 13 67  8 54  7 75 11 32 10 40  1 97
+10 92 14 36  4 22  9  9  3 47  1 77 12 79 13 36  6 30  8 98 11 79  7  7  5 55  2  6  0 30
+ 0 49 13 83  3 73  6 82  1 82 14 92 11 73  4 31 10 35  9 54  5  7  8 37  7 72  2 52 12 76
+10 98 12 34 13 52  4 26  1 28  3 39  8 80  5 29  9 70  0 43  6 48  7 58  2 45 14 94 11 96
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index f166e6e..7a0a3a1 100644
--- a/scalar-variable/job-shop-scheduling/data/jsplib/manifest.json
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/manifest.json
@@ -1,11 +1,1249 @@
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+      "family": "ta",
+      "path": "ta16.txt",
+      "known_best_makespan": null,
+      "lower_bound_makespan": 1302,
+      "upper_bound_makespan": 1360
+    },
+    {
+      "name": "ta17",
+      "family": "ta",
+      "path": "ta17.txt",
+      "known_best_makespan": 1462
+    },
+    {
+      "name": "ta18",
+      "family": "ta",
+      "path": "ta18.txt",
+      "known_best_makespan": null,
+      "lower_bound_makespan": 1369,
+      "upper_bound_makespan": 1396
+    },
+    {
+      "name": "ta19",
+      "family": "ta",
+      "path": "ta19.txt",
+      "known_best_makespan": null,
+      "lower_bound_makespan": 1297,
+      "upper_bound_makespan": 1335
+    },
+    {
+      "name": "ta20",
+      "family": "ta",
+      "path": "ta20.txt",
+      "known_best_makespan": null,
+      "lower_bound_makespan": 1318,
+      "upper_bound_makespan": 1351
+    },
+    {
+      "name": "ta21",
+      "family": "ta",
+      "path": "ta21.txt",
+      "known_best_makespan": null,
+      "lower_bound_makespan": 1539,
+      "upper_bound_makespan": 1644
+    },
+    {
+      "name": "ta22",
+      "family": "ta",
+      "path": "ta22.txt",
+      "known_best_makespan": null,
+      "lower_bound_makespan": 1511,
+      "upper_bound_makespan": 1600
+    },
+    {
+      "name": "ta23",
+      "family": "ta",
+      "path": "ta23.txt",
+      "known_best_makespan": null,
+      "lower_bound_makespan": 1472,
+      "upper_bound_makespan": 1557
+    },
+    {
+      "name": "ta24",
+      "family": "ta",
+      "path": "ta24.txt",
+      "known_best_makespan": null,
+      "lower_bound_makespan": 1602,
+      "upper_bound_makespan": 1647
+    },
+    {
+      "name": "ta25",
+      "family": "ta",
+      "path": "ta25.txt",
+      "known_best_makespan": null,
+      "lower_bound_makespan": 1504,
+      "upper_bound_makespan": 1595
+    },
+    {
+      "name": "ta26",
+      "family": "ta",
+      "path": "ta26.txt",
+      "known_best_makespan": null,
+      "lower_bound_makespan": 1539,
+      "upper_bound_makespan": 1645
+    },
+    {
+      "name": "ta27",
+      "family": "ta",
+      "path": "ta27.txt",
+      "known_best_makespan": null,
+      "lower_bound_makespan": 1616,
+      "upper_bound_makespan": 1680
+    },
+    {
+      "name": "ta28",
+      "family": "ta",
+      "path": "ta28.txt",
+      "known_best_makespan": null,
+      "lower_bound_makespan": 1591,
+      "upper_bound_makespan": 1614
+    },
+    {
+      "name": "ta29",
+      "family": "ta",
+      "path": "ta29.txt",
+      "known_best_makespan": null,
+      "lower_bound_makespan": 1514,
+      "upper_bound_makespan": 1635
+    },
+    {
+      "name": "ta30",
+      "family": "ta",
+      "path": "ta30.txt",
+      "known_best_makespan": null,
+      "lower_bound_makespan": 1473,
+      "upper_bound_makespan": 1584
+    },
+    {
+      "name": "ta31",
+      "family": "ta",
+      "path": "ta31.txt",
+      "known_best_makespan": 1764
+    },
+    {
+      "name": "ta32",
+      "family": "ta",
+      "path": "ta32.txt",
+      "known_best_makespan": null,
+      "lower_bound_makespan": 1774,
+      "upper_bound_makespan": 1796
+    },
+    {
+      "name": "ta33",
+      "family": "ta",
+      "path": "ta33.txt",
+      "known_best_makespan": null,
+      "lower_bound_makespan": 1778,
+      "upper_bound_makespan": 1793
+    },
+    {
+      "name": "ta34",
+      "family": "ta",
+      "path": "ta34.txt",
+      "known_best_makespan": null,
+      "lower_bound_makespan": 1828,
+      "upper_bound_makespan": 1829
+    },
+    {
+      "name": "ta35",
+      "family": "ta",
+      "path": "ta35.txt",
+      "known_best_makespan": 2007
+    },
+    {
+      "name": "ta36",
+      "family": "ta",
+      "path": "ta36.txt",
+      "known_best_makespan": 1819
+    },
+    {
+      "name": "ta37",
+      "family": "ta",
+      "path": "ta37.txt",
+      "known_best_makespan": null,
+      "lower_bound_makespan": 1771,
+      "upper_bound_makespan": 1778
+    },
+    {
+      "name": "ta38",
+      "family": "ta",
+      "path": "ta38.txt",
+      "known_best_makespan": 1673
+    },
+    {
+      "name": "ta39",
+      "family": "ta",
+      "path": "ta39.txt",
+      "known_best_makespan": 1795
+    },
+    {
+      "name": "ta40",
+      "family": "ta",
+      "path": "ta40.txt",
+      "known_best_makespan": null,
+      "lower_bound_makespan": 1631,
+      "upper_bound_makespan": 1674
+    },
+    {
+      "name": "ta41",
+      "family": "ta",
+      "path": "ta41.txt",
+      "known_best_makespan": null,
+      "lower_bound_makespan": 1859,
+      "upper_bound_makespan": 2018
+    },
+    {
+      "name": "ta42",
+      "family": "ta",
+      "path": "ta42.txt",
+      "known_best_makespan": null,
+      "lower_bound_makespan": 1867,
+      "upper_bound_makespan": 1956
+    },
+    {
+      "name": "ta43",
+      "family": "ta",
+      "path": "ta43.txt",
+      "known_best_makespan": null,
+      "lower_bound_makespan": 1809,
+      "upper_bound_makespan": 1859
+    },
+    {
+      "name": "ta44",
+      "family": "ta",
+      "path": "ta44.txt",
+      "known_best_makespan": null,
+      "lower_bound_makespan": 1927,
+      "upper_bound_makespan": 1984
+    },
+    {
+      "name": "ta45",
+      "family": "ta",
+      "path": "ta45.txt",
+      "known_best_makespan": null,
+      "lower_bound_makespan": 1997,
+      "upper_bound_makespan": 2000
+    },
+    {
+      "name": "ta46",
+      "family": "ta",
+      "path": "ta46.txt",
+      "known_best_makespan": null,
+      "lower_bound_makespan": 1940,
+      "upper_bound_makespan": 2021
+    },
+    {
+      "name": "ta47",
+      "family": "ta",
+      "path": "ta47.txt",
+      "known_best_makespan": null,
+      "lower_bound_makespan": 1789,
+      "upper_bound_makespan": 1903
+    },
+    {
+      "name": "ta48",
+      "family": "ta",
+      "path": "ta48.txt",
+      "known_best_makespan": null,
+      "lower_bound_makespan": 1912,
+      "upper_bound_makespan": 1952
+    },
+    {
+      "name": "ta49",
+      "family": "ta",
+      "path": "ta49.txt",
+      "known_best_makespan": null,
+      "lower_bound_makespan": 1915,
+      "upper_bound_makespan": 1968
+    },
+    {
+      "name": "ta50",
+      "family": "ta",
+      "path": "ta50.txt",
+      "known_best_makespan": null,
+      "lower_bound_makespan": 1807,
+      "upper_bound_makespan": 1926
+    },
+    {
+      "name": "ta51",
+      "family": "ta",
+      "path": "ta51.txt",
+      "known_best_makespan": 2760
+    },
+    {
+      "name": "ta52",
+      "family": "ta",
+      "path": "ta52.txt",
+      "known_best_makespan": 2756
+    },
+    {
+      "name": "ta53",
+      "family": "ta",
+      "path": "ta53.txt",
+      "known_best_makespan": 2717
+    },
+    {
+      "name": "ta54",
+      "family": "ta",
+      "path": "ta54.txt",
+      "known_best_makespan": 2839
+    },
+    {
+      "name": "ta55",
+      "family": "ta",
+      "path": "ta55.txt",
+      "known_best_makespan": 2679
+    },
+    {
+      "name": "ta56",
+      "family": "ta",
+      "path": "ta56.txt",
+      "known_best_makespan": 2781
+    },
+    {
+      "name": "ta57",
+      "family": "ta",
+      "path": "ta57.txt",
+      "known_best_makespan": 2943
+    },
+    {
+      "name": "ta58",
+      "family": "ta",
+      "path": "ta58.txt",
+      "known_best_makespan": 2885
+    },
+    {
+      "name": "ta59",
+      "family": "ta",
+      "path": "ta59.txt",
+      "known_best_makespan": 2655
+    },
+    {
+      "name": "ta60",
+      "family": "ta",
+      "path": "ta60.txt",
+      "known_best_makespan": 2723
+    },
+    {
+      "name": "ta61",
+      "family": "ta",
+      "path": "ta61.txt",
+      "known_best_makespan": 2868
+    },
+    {
+      "name": "ta62",
+      "family": "ta",
+      "path": "ta62.txt",
+      "known_best_makespan": 2869
+    },
+    {
+      "name": "ta63",
+      "family": "ta",
+      "path": "ta63.txt",
+      "known_best_makespan": 2755
+    },
+    {
+      "name": "ta64",
+      "family": "ta",
+      "path": "ta64.txt",
+      "known_best_makespan": 2702
+    },
+    {
+      "name": "ta65",
+      "family": "ta",
+      "path": "ta65.txt",
+      "known_best_makespan": 2725
+    },
+    {
+      "name": "ta66",
+      "family": "ta",
+      "path": "ta66.txt",
+      "known_best_makespan": 2845
+    },
+    {
+      "name": "ta67",
+      "family": "ta",
+      "path": "ta67.txt",
+      "known_best_makespan": 2825
+    },
+    {
+      "name": "ta68",
+      "family": "ta",
+      "path": "ta68.txt",
+      "known_best_makespan": 2784
+    },
+    {
+      "name": "ta69",
+      "family": "ta",
+      "path": "ta69.txt",
+      "known_best_makespan": 3071
+    },
+    {
+      "name": "ta70",
+      "family": "ta",
+      "path": "ta70.txt",
+      "known_best_makespan": 2995
+    },
+    {
+      "name": "ta71",
+      "family": "ta",
+      "path": "ta71.txt",
+      "known_best_makespan": null
+    },
+    {
+      "name": "ta72",
+      "family": "ta",
+      "path": "ta72.txt",
+      "known_best_makespan": null
+    },
+    {
+      "name": "ta73",
+      "family": "ta",
+      "path": "ta73.txt",
+      "known_best_makespan": null
+    },
+    {
+      "name": "ta74",
+      "family": "ta",
+      "path": "ta74.txt",
+      "known_best_makespan": null
+    },
+    {
+      "name": "ta75",
+      "family": "ta",
+      "path": "ta75.txt",
+      "known_best_makespan": null
+    },
+    {
+      "name": "ta76",
+      "family": "ta",
+      "path": "ta76.txt",
+      "known_best_makespan": null
+    },
+    {
+      "name": "ta77",
+      "family": "ta",
+      "path": "ta77.txt",
+      "known_best_makespan": null
+    },
+    {
+      "name": "ta78",
+      "family": "ta",
+      "path": "ta78.txt",
+      "known_best_makespan": null
+    },
+    {
+      "name": "ta79",
+      "family": "ta",
+      "path": "ta79.txt",
+      "known_best_makespan": null
+    },
+    {
+      "name": "ta80",
+      "family": "ta",
+      "path": "ta80.txt",
+      "known_best_makespan": null
+    }
   ]
 }
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/orb01.txt b/scalar-variable/job-shop-scheduling/data/jsplib/orb01.txt
new file mode 100644
index 0000000..1a6bf18
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/orb01.txt
@@ -0,0 +1,15 @@
+#+++++++++++++++++++++++++++++
+# instance orb01
+#+++++++++++++++++++++++++++++
+# trivial 10x10 instance from Bill Cook (BIC2)
+10 10
+0 72 1 64 2 55 3 31 4 53 5 95 6 11 7 52 8  6 9 84
+0 61 3 27 4 88 2 78 1 49 5 83 8 91 6 74 7 29 9 87
+0 86 3 32 1 35 2 37 5 18 4 48 6 91 7 52 9 60 8 30
+0  8 1 82 4 27 3 99 6 74 5  9 2 33 9 20 7 59 8 98
+1 50 0 94 5 43 3 62 4 55 7 48 2  5 8 36 9 47 6 36
+0 53 6 30 2  7 3 12 1 68 8 87 4 28 9 70 7 45 5  7
+2 29 3 96 0 99 1 14 4 34 7 14 5  7 6 76 8 57 9 76
+2 90 0 19 3 87 4 51 1 84 5 45 9 84 6 58 7 81 8 96
+2 97 1 99 4 93 0 38 7 13 5 96 3 40 9 64 6 32 8 45
+2 44 0 60 8 29 3  5 6 74 1 85 4 34 7 95 9 51 5 47
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/orb02.txt b/scalar-variable/job-shop-scheduling/data/jsplib/orb02.txt
new file mode 100644
index 0000000..752a65c
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/orb02.txt
@@ -0,0 +1,15 @@
+#+++++++++++++++++++++++++++++
+# instance orb02
+#+++++++++++++++++++++++++++++
+# doomed 10x10 instance from Monika (MON2)
+10 10
+0 72 1 54 2 33 3 86 4 75 5 16 6 96 7  7 8 99 9 76
+0 16 3 88 4 48 8 52 9 60 6 29 7 18 5 89 2 80 1 76
+0 47 7 11 3 14 2 56 6 16 4 83 1 10 5 61 8 24 9 58
+0 49 1 31 3 17 8 50 5 63 2 35 4 65 7 23 6 50 9 29
+0 55 6  6 1 28 3 96 5 86 2 99 9 14 7 70 8 64 4 24
+4 46 0 23 6 70 8 19 2 54 3 22 9 85 7 87 5 79 1 93
+4 76 3 60 0 76 9 98 2 76 1 50 8 86 7 14 6 27 5 57
+4 93 6 27 9 57 3 87 8 86 2 54 7 24 5 49 0 20 1 47
+2 28 6 11 8 78 7 85 4 63 9 81 3 10 1  9 5 46 0 32
+2 22 9 76 5 89 8 13 6 88 3 10 7 75 4 98 1 78 0 17
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/orb03.txt b/scalar-variable/job-shop-scheduling/data/jsplib/orb03.txt
new file mode 100644
index 0000000..40e8551
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/orb03.txt
@@ -0,0 +1,15 @@
+#+++++++++++++++++++++++++++++
+# instance orb03
+#+++++++++++++++++++++++++++++
+# deadlier 10x10 instance from Bruce Gamble (BRG1)
+10 10
+0 96 1 69 2 25 3  5 4 55 5 15 6 88 7 11 8 17 9 82
+0 11 1 48 2 67 3 38 4 18 7 24 6 62 5 92 9 96 8 81
+2 67 1 63 0 93 4 85 3 25 5 72 6 51 7 81 8 58 9 15
+2 30 1 35 0 27 4 82 3 44 7 92 6 25 5 49 9 28 8 77
+1 53 0 83 4 73 3 26 2 77 6 33 5 92 9 99 8 38 7 38
+1 20 0 44 4 81 3 88 2 66 6 70 5 91 9 37 8 55 7 96
+1 21 2 93 4 22 0 56 3 34 6 40 7 53 9 46 5 29 8 63
+1 32 2 63 4 36 0 26 3 17 5 85 7 15 8 55 9 16 6 82
+0 73 2 46 3 89 4 24 1 99 6 92 7  7 9 51 5 19 8 14
+0 52 2 20 3 70 4 98 1 23 5 15 7 81 8 71 9 24 6 81
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/orb04.txt b/scalar-variable/job-shop-scheduling/data/jsplib/orb04.txt
new file mode 100644
index 0000000..ad934ff
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/orb04.txt
@@ -0,0 +1,15 @@
+#+++++++++++++++++++++++++++++
+# instance orb04
+#+++++++++++++++++++++++++++++
+# deadly 10x10 instance from Bruce Shepherd (BRS1)
+10 10
+0  8 1 10 2 35 3 44 4 15 5 92 6 70 7 89 8 50 9 12
+0 63 8 39 3 80 5 22 2 88 1 39 9 85 6 27 7 74 4 69
+0 52 6 22 1 33 3 68 8 27 2 68 5 25 4 34 7 24 9 84
+0 31 1 85 4 55 8 80 5 58 7 11 6 69 9 56 3 73 2 25
+0 97 5 98 9 87 8 47 7 77 4 90 3 98 2 80 1 39 6 40
+1 97 5 68 0 44 9 67 2 44 8 85 3 78 6 90 7 33 4 81
+0 34 3 76 8 48 7 61 9 11 2 36 4 33 6 98 1  7 5 44
+0 44 9  5 4 85 1 51 5 58 7 79 2 95 6 48 3 86 8 73
+0 24 1 63 9 48 7 77 8 73 6 74 4 63 5 17 2 93 3 84
+0 51 2  5 4 40 9 60 1 46 5 58 8 54 3 72 6 29 7 94
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/orb05.txt b/scalar-variable/job-shop-scheduling/data/jsplib/orb05.txt
new file mode 100644
index 0000000..b3d2af3
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/orb05.txt
@@ -0,0 +1,15 @@
+#+++++++++++++++++++++++++++++
+# instance orb05
+#+++++++++++++++++++++++++++++
+# 10x10 instance from George Steiner (GES1)
+10 10
+9 11 8 93 0 48 7 76 6 13 5 71 3 59 2 90 4 10 1 65
+8 52 9 76 0 84 7 73 5 56 4 10 6 26 2 43 3 39 1 49
+9 28 8 44 7 26 6 66 4 68 5 74 3 27 2 14 1  6 0 21
+0 18 1 58 3 62 2 46 6 25 4  6 5 60 7 28 8 80 9 30
+0 78 1 47 7 29 5 16 4 29 6 57 3 78 2 87 8 39 9 73
+9 66 8 51 3 12 7 64 5 67 4 15 6 66 2 26 1 20 0 98
+8 23 9 76 6 45 7 75 5 24 3 18 4 83 2 15 1 88 0 17
+9 56 8 83 7 80 6 16 4 31 5 93 3 30 2 29 1 66 0 28
+9 79 8 69 2 82 4 16 5 62 3 41 6 91 7 35 0 34 1 75
+0  5 1 19 2 20 3 12 4 94 5 60 6 99 7 31 8 96 9 63
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/orb06.txt b/scalar-variable/job-shop-scheduling/data/jsplib/orb06.txt
new file mode 100644
index 0000000..d1cd2a6
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/orb06.txt
@@ -0,0 +1,15 @@
+#+++++++++++++++++++++++++++++
+# instance orb06
+#+++++++++++++++++++++++++++++
+# trivial 10X10 instance from Bill Cook (BIC1)
+10 10
+0 99 1 74 2 49 3 67 4 17 5  7 6  9 7 39 8 35 9 49
+0 49 3 67 4 82 2 92 1 62 5 84 8 45 6 30 7 42 9 71
+0 26 3 33 1 82 2 98 5 83 4 16 6 64 7 65 9 36 8 77
+0 41 1 62 4 73 3 94 6 51 5 46 2 55 9 31 7 64 8 46
+1 68 0 26 5 50 3 46 4 25 7 88 2  6 8 13 9 98 6 84
+0 24 6 80 2 91 3 55 1 48 8 99 4 72 9 91 7 84 5 12
+2 16 3 13 0  9 1 58 4 23 7 85 5 36 6 89 8 71 9 41
+2 54 0 41 3 38 4 53 1 11 5 74 9 88 6 46 7 41 8 65
+2 53 1 50 4 40 0 90 7  7 5 80 3 57 9 60 6 91 8 47
+2 45 0 59 8 81 3 99 6 71 1 19 4 75 7 77 9 94 5 95
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/orb07.txt b/scalar-variable/job-shop-scheduling/data/jsplib/orb07.txt
new file mode 100644
index 0000000..9bca16f
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/orb07.txt
@@ -0,0 +1,15 @@
+#+++++++++++++++++++++++++++++
+# instance orb07
+#+++++++++++++++++++++++++++++
+# doomed 10x10 instance from Monika (MON1)
+10 10
+0 32 1 14 2 15 3 37 4 18 5 43 6 19 7 27 8 28 9 31
+0  8 3 12 4 49 8 24 9 52 6 19 7 23 5 19 2 17 1 32
+0 25 7 19 3 27 2 45 6 21 4 15 1 13 5 16 8 43 9 19
+0 24 1 18 3 41 8 29 5 14 2 17 4 23 7 15 6 18 9 23
+0 27 6 29 1 39 3 21 5 15 2 15 9 25 7 26 8 44 4 20
+4 17 0 15 6 51 8 17 2 46 3 16 9 33 7 25 5 30 1 25
+4 15 3 31 0 25 9 12 2 13 1 51 8 19 7 21 6 12 5 26
+4  8 6 29 9 25 3 15 8 17 2 22 7 32 5 20 0 11 1 28
+2 41 6 10 8 32 7  5 4 21 9 59 3 26 1 10 5 16 0 29
+2 20 9  7 5 44 8 22 6 33 3 25 7 29 4 12 1 14 0  0
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/orb08.txt b/scalar-variable/job-shop-scheduling/data/jsplib/orb08.txt
new file mode 100644
index 0000000..eb81090
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/orb08.txt
@@ -0,0 +1,15 @@
+#+++++++++++++++++++++++++++++
+# instance orb08
+#+++++++++++++++++++++++++++++
+# deadlier 10x10 instance from Bruce Gamble (BRG2)
+10 10
+0 55 1 74 2 45 3 23 4 76 5 19 6 18 7 61 8 44 9 11
+0 63 1 43 2 51 3 18 4 42 7 11 6 29 5 52 9 29 8 88
+2 88 1 31 0 47 4 10 3 62 5 60 6 58 7 29 8 52 9 92
+2 16 1 71 0 55 4 55 3  9 7 49 6 83 5 54 9  7 8 57
+1  7 0 41 4 92 3 94 2 46 6 79 5 34 9 38 8  8 7 18
+1 25 0  5 4 89 3 94 2 14 6 94 5 20 9 23 8 44 7 39
+1 24 2 21 4 47 0 40 3 94 6 71 7 89 9 75 5 97 8 15
+1  5 2  7 4 74 0 28 3 72 5 61 7  9 8 53 9 32 6 97
+0 34 2 52 3 37 4  6 1 94 6  6 7 56 9 41 5  5 8 16
+0 77 2 74 3 82 4 10 1 29 5 15 7 51 8 65 9 37 6 21
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/orb09.txt b/scalar-variable/job-shop-scheduling/data/jsplib/orb09.txt
new file mode 100644
index 0000000..a41c1e3
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/orb09.txt
@@ -0,0 +1,15 @@
+#+++++++++++++++++++++++++++++
+# instance orb09
+#+++++++++++++++++++++++++++++
+# deadly 10x10 instance from Bruce Shepherd (BRS2)
+10 10
+0 36 1 96 2 86 3  7 4 20 5  9 6 39 7 79 8 82 9 24
+0 16 8 95 3 67 5 63 2 87 1 24 9 62 6 49 7 92 4 16
+0 65 6 71 1  9 3 67 8 70 2 48 5 49 4 66 7  5 9 96
+0 50 1 31 4  6 8 13 5 98 7 97 6 93 9 30 3 34 2 83
+0 99 5  7 9 55 8 78 7 68 4 81 3 90 2 75 1 66 6 40
+1 42 5 11 0  5 9 39 2 10 8 30 3 39 6 50 7 20 4 51
+0 38 3 68 8 86 7 77 9 32 2 89 4 37 6 53 1 43 5 89
+0 19 9 11 4 37 1 41 5 72 7  7 2 52 6 31 3 68 8 10
+0 83 1 21 9 23 7 87 8 58 6 89 4 74 5 29 2 74 3 23
+0 44 2 57 4 69 9 50 1 65 5 69 8 60 3 58 6 89 7 13
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/orb10.txt b/scalar-variable/job-shop-scheduling/data/jsplib/orb10.txt
new file mode 100644
index 0000000..93c641b
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/orb10.txt
@@ -0,0 +1,15 @@
+#+++++++++++++++++++++++++++++
+# instance orb10
+#+++++++++++++++++++++++++++++
+# 10x10 instance from George Steiner (GES2)
+10 10
+9 66 8 13 0 93 7 91 6 14 5 70 3 99 2 53 4 86 1 16
+8 34 9 99 0 62 7 65 5 62 4 64 6 21 2 12 3  9 1 75
+9 12 8 26 7 64 6 92 4 67 5 28 3 66 2 83 1 38 0 58
+0 77 1 73 3 82 2 75 6 84 4 19 5 18 7 89 8  8 9 73
+0 34 1 74 7 48 5 44 4 92 6 40 3 60 2 62 8 22 9 67
+9  8 8 85 3 58 7 97 5 92 4 89 6 75 2 77 1 95 0  5
+8 52 9 43 6  5 7 78 5 12 3 62 4 21 2 80 1 60 0 31
+9 81 8 23 7 23 6 75 4 78 5 56 3 51 2 39 1 53 0 96
+9 79 8 55 2 88 4 21 5 83 3 93 6 47 7 10 0 63 1 14
+0 43 1 63 2 83 3 29 4 52 5 98 6 54 7 39 8 33 9 23
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/swv01.txt b/scalar-variable/job-shop-scheduling/data/jsplib/swv01.txt
new file mode 100644
index 0000000..03df8c7
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/swv01.txt
@@ -0,0 +1,25 @@
+# ++++++++++++++++++++++++++++
+# instance swv01
+#+++++++++++++++++++++++++++++
+# Storer, Wu, and Vaccari hard 20x10 instance (Table 2, instance 1)
+20 10
+ 3  19  2  27  1  39  4  13  0  25  8  37  9  40  5  54  7  74  6  93
+ 2  69  0  30  4   1  3   4  1  64  7  71  5   2  9  84  6  31  8   8
+ 4  79  3  80  0  86  2  55  1  54  8  81  6  72  7  86  5  59  9  75
+ 2  76  3  15  1  26  0  17  4  30  8  44  7  91  6  83  5  52  9  68
+ 4  73  3  87  1  74  0  39  2  98  9 100  5  43  8  17  7   7  6  77
+ 1  63  0  49  2  16  3  55  4   9  9  73  5  61  8  34  6  82  7  46
+ 0  87  1  71  4  43  3  80  2  39  7  70  8  18  6  41  9  79  5  44
+ 4  70  2  22  0  73  3  62  1  64  5  25  8  19  6  69  9  41  7  28
+ 3  16  0  84  1  58  4   7  2   9  5   8  6  10  7  17  8  42  9  65
+ 3   8  0  10  1   3  4  41  2   3  7  40  8  56  5  53  9  96  6  13
+ 4  62  1  60  3  64  2  12  0  39  5   2  7  64  6  87  9  21  8  60
+ 2  66  1  71  3  23  4  75  0  78  7  74  6  35  9  24  8  23  5  50
+ 1   5  3  92  4   6  0  69  2  80  7  13  5  17  9  89  6  80  8  47
+ 0  82  3  84  1  24  2  47  4  93  7  85  5  34  6  73  8  28  9  91
+ 4  55  0  57  3  63  2  24  1  40  7  30  6  37  5  99  8  88  9  41
+ 1  75  2  47  3  68  0   7  4  78  7  80  6   2  9  23  8  49  5  50
+ 0  91  4  25  2  10  1  21  3  94  8   6  7  59  5  84  9  75  6  70
+ 2  85  1  31  0  94  4  94  3  11  5  21  9   7  6  61  8  50  7  93
+ 1  27  0  77  4  13  2  30  3   2  5  88  7   4  9  39  6  53  8  54
+ 1  34  2  12  3  31  0  24  4  24  7  16  5   6  9  88  8  81  6  11
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/swv02.txt b/scalar-variable/job-shop-scheduling/data/jsplib/swv02.txt
new file mode 100644
index 0000000..3bce1d3
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/swv02.txt
@@ -0,0 +1,25 @@
+#+++++++++++++++++++++++++++++
+# instance swv02
+#+++++++++++++++++++++++++++++
+# Storer, Wu, and Vaccari hard 20x10 instance (Table 2, instance 2)
+20 10
+ 2  16  1  58  0  22  4  24  3  53  8   9  9  57  7  63  5  92  6  43
+ 3   6  1  48  4  14  0  66  2  24  7   2  9  85  6  73  8  19  5  99
+ 4 100  2  90  0  63  1  14  3  31  5  27  9  15  8   1  6  51  7  33
+ 2  98  3  84  4  52  0  12  1  96  9  60  6  74  8  93  5  45  7  49
+ 4  39  0  54  2  28  3   8  1  30  8  57  6  75  5   9  7  41  9  19
+ 3  94  0   8  2  89  1  13  4  37  8  36  6  63  9  24  5  71  7  97
+ 3  90  2  69  1  25  4  15  0  65  7  52  6  56  9  91  8  83  5  86
+ 3  59  1  99  4  41  0  68  2  14  7   4  9  55  6  48  8  13  5  15
+ 4  36  2  17  1  51  0  16  3  54  8  45  5  50  7  98  6  68  9  82
+ 1  75  0  11  4  55  2  93  3  51  6  61  9  40  7  19  8  24  5  55
+ 4  56  0  73  3  59  2  38  1  51  6  99  8  29  9  53  5   7  7  72
+ 3  68  4  50  1  88  2  88  0  33  5  47  8  52  6  26  9  74  7  68
+ 2   3  3  42  0  45  1  57  4  28  5  14  8  22  9  31  6  44  7  38
+ 3  89  0  73  4  12  1   9  2  49  5  11  8  15  7  41  9  37  6  10
+ 3  76  2  97  4 100  1  92  0  25  5   8  9  92  7  51  6  58  8  65
+ 4  50  0  54  3  85  1  47  2  45  6  99  9  39  5  32  8  87  7  56
+ 0  70  2  58  3  33  1  85  4  25  8   5  7  65  9  20  6  52  5  44
+ 1  22  3  45  4  60  0  66  2   5  7  61  6  73  9  60  5  14  8  44
+ 4  64  0  97  2  31  1   4  3  43  9  47  7  93  6 100  5  10  8  51
+ 3   9  4  87  2  34  0  62  1  56  5  66  8  95  7  56  9  42  6  86
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/swv03.txt b/scalar-variable/job-shop-scheduling/data/jsplib/swv03.txt
new file mode 100644
index 0000000..f024abb
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/swv03.txt
@@ -0,0 +1,25 @@
+#+++++++++++++++++++++++++++++
+# instance swv03
+#+++++++++++++++++++++++++++++
+# Storer, Wu, and Vaccari hard 20x10 instance (Table 2, instance 3)
+20 10
+ 2  19  0  30  1  68  4  55  3  24  8  34  7  72  5  32  9  62  6  45
+ 2  63  1  11  4  65  3  16  0  67  9  95  8  23  7  82  6  52  5  53
+ 2  19  4  17  1  79  3  49  0  12  7  41  9  67  8  40  6  25  5  42
+ 0  42  2  71  3  27  4  95  1  19  5  48  8 100  6  31  7  25  9  38
+ 3   1  1 100  4  68  0  94  2  89  5  86  7  35  9  29  8  56  6  55
+ 4  93  1  53  2   4  3  48  0  57  8  99  7  67  5  86  6  80  9  60
+ 4  82  1  95  2  12  0  60  3  80  8  88  7   5  6  81  9  52  5  69
+ 3  79  1  31  4  63  0  28  2  64  8  63  5  29  7  75  9  18  6  33
+ 4   9  1  64  2  31  0  13  3  33  9  82  6  79  5  30  7  84  8  20
+ 2  14  0  56  1  95  4  34  3  13  6  16  5  44  7  45  8  62  9  86
+ 4  66  3   9  2  66  1  46  0  12  5  10  7  58  6   6  8  62  9  17
+ 4  89  1  52  2  37  3  74  0   7  8  43  5  96  7  89  6  21  9  66
+ 1  73  3  68  2   5  4  49  0  67  9  23  7   7  5  44  8  30  6  29
+ 2  21  0  68  1  88  4  75  3  64  6   6  8  72  7  66  9  66  5  56
+ 1  24  4  25  2  69  0  27  3  51  9  60  8  26  6  45  5  77  7  93
+ 2  19  3  17  1  82  4  75  0  34  5  67  9  89  6  91  7  13  8  35
+ 4   2  0  21  3  83  1  19  2  65  6  65  8   8  9  68  7  60  5   7
+ 1  63  3  49  2   4  4   2  0  50  9  99  5  27  6  68  8  46  7  89
+ 0  48  4  45  3 100  2  66  1  30  6  58  7  73  9  94  5  36  8   5
+ 2  36  0  53  4  56  3  57  1  77  9   7  6  59  8   8  5  15  7  23
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/swv04.txt b/scalar-variable/job-shop-scheduling/data/jsplib/swv04.txt
new file mode 100644
index 0000000..9167342
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/swv04.txt
@@ -0,0 +1,25 @@
+#+++++++++++++++++++++++++++++
+# instance swv04
+#+++++++++++++++++++++++++++++
+# Storer, Wu, and Vaccari hard 20x10 instance (Table 2, instance 4)
+20 10
+ 2  16  0  59  4  10  3  95  1  64  8  92  9  56  7   3  5  73  6  17
+ 1   5  4  64  3  30  2  14  0  96  9  11  8  73  7  35  6  93  5  12
+ 3  35  4  75  0  54  1  30  2  83  9  20  8  29  7  38  6  90  5  39
+ 4  29  3  21  0  52  2  93  1  20  5   5  7  11  8  53  9  56  6  98
+ 0  17  3  16  4  41  1  78  2 100  5  55  8  27  6   2  7  87  9  55
+ 3  97  1  32  4  84  2  71  0  38  9  64  7  16  5   5  6  41  8  41
+ 3  41  1  57  4  37  0  64  2  92  6  19  9  47  7  94  8  79  5  21
+ 0  23  3  67  1  39  4  98  2  63  8  83  5  45  6  89  9  81  7  44
+ 1  88  0  59  3  39  2  63  4  91  8  36  5  44  6  45  9  43  7  12
+ 2  29  1  17  0   6  3  74  4  51  9  14  6   2  5  56  7  49  8  14
+ 3  75  2  10  4   1  0  35  1  99  7  56  5  95  9  78  6  53  8  82
+ 0  75  2  96  1  21  3  90  4  55  6  23  7  40  9  76  8  55  5  45
+ 3  90  4  64  0  72  2  33  1  59  7  51  6  74  5  85  9  76  8  38
+ 3  57  1  84  2  87  4   2  0  68  8   4  5  77  6  37  7  37  9  94
+ 1  16  3  46  4  34  2  23  0  77  7  68  8  14  9  54  5  37  6  99
+ 4  24  1  73  2  92  0  43  3  42  5  81  7  99  8  88  9  80  6   5
+ 1  56  2  51  0   3  4  87  3  25  5  62  7  11  8  88  6  68  9  29
+ 2  85  3   3  4  21  0  49  1  79  8  38  5  37  9  72  7  18  6  18
+ 0   2  3  55  1  31  2  29  4  98  5  92  6  43  8  99  7  67  9  41
+ 4  69  3  64  0  61  1  13  2  31  5   6  8  84  9  94  7  32  6  54
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/swv05.txt b/scalar-variable/job-shop-scheduling/data/jsplib/swv05.txt
new file mode 100644
index 0000000..1130b56
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/swv05.txt
@@ -0,0 +1,25 @@
+#+++++++++++++++++++++++++++++
+# instance swv05
+#+++++++++++++++++++++++++++++
+# Storer, Wu, and Vaccari hard 20x10 instance (Table 2, instance 5)
+20 10
+ 2  19  1  30  3  80  0  84  4  14  8  51  5  73  6  91  7  81  9  71
+ 2  74  4  79  1  39  0   7  3  66  9   6  5  93  8  76  6  21  7  76
+ 4  90  3  33  1  38  2  73  0  61  8  61  7  76  5  86  9  28  6  35
+ 4   1  3  22  2   1  0  77  1  33  6  98  5   4  9  27  8   8  7  68
+ 2  63  4   5  1  95  0   7  3  50  8  46  9  28  6  70  5  60  7  34
+ 0  98  1  73  4  15  3  21  2  32  7  24  9   9  8  24  5   7  6  34
+ 3  51  4  47  2  30  1  16  0  51  5  41  6  79  7  79  9   3  8  72
+ 4   3  1  59  0  53  3  20  2  19  6  20  9  16  7  90  5  96  8  18
+ 1  34  2  55  3  97  0  93  4  90  7  81  5  63  8  41  6   1  9  51
+ 4  77  3  87  1  92  2  83  0  45  7  75  9  60  6  75  5  93  8  33
+ 0  31  2  66  1  58  4  17  3  94  5  63  7  80  9  61  6  78  8  52
+ 4  70  1  25  2  75  0  89  3  41  7 100  5  73  6  28  8  94  9  88
+ 1  67  4  62  3  12  2  55  0  62  5  58  8  66  7  73  6  55  9   1
+ 4  81  0  37  1   2  3  39  2  17  7  74  6  71  8  61  5  42  9   5
+ 3  62  0  31  4  63  2  31  1   5  9   7  7  77  8  34  6  34  5   3
+ 0   5  2  55  3  62  1  82  4  80  6   6  8   7  7  29  5  80  9  89
+ 3  26  1  50  2  58  0  22  4  68  7  12  6   9  9  34  5  90  8  87
+ 0  50  2  28  1  64  4  34  3  63  7   9  9  48  6  63  8  61  5   2
+ 0  47  2  23  1  23  4  82  3  98  7  66  6  78  8 100  9  79  5  32
+ 1  13  4  14  0  90  2  77  3  80  9  30  7  31  5  36  6  51  8  69
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/swv06.txt b/scalar-variable/job-shop-scheduling/data/jsplib/swv06.txt
new file mode 100644
index 0000000..480da6c
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/swv06.txt
@@ -0,0 +1,25 @@
+#+++++++++++++++++++++++++++++
+# instance swv06
+#+++++++++++++++++++++++++++++
+# Storer, Wu, and Vaccari hard 20x15 instance (Table 2, instance 6)
+20 15
+ 1  16  6  58  2  22  4  24  5  53  3   9  0  57 10  63  8  92 12  43  7  41 13  26 14  20  9  44 11  93
+ 2  89  1  94  0  86  3  13  6  54  4  41  5  55  7  98 13  38 14  80  9   1 11 100 12  90 10  63  8  14
+ 1  26  6  96  3  32  4  75  5   9  0  57  2  39 12  54 14  28 10   8 11  30 13  57  9  75  7   9  8  41
+ 3  37  2  36  5  63  0  24  6  71  1  97  4  74 14  19 12  45  8  24 11  71 13  53 10  61  9   6  7  32
+ 3  57  0  55  1  21  5  84  2  23  6  79  4  90 11   8 14  59 10  99  9  41 12  68  8  14 13   4  7  55
+ 4  10  2  81  1  13  3  78  0  78  5  10  6  48  9  37 11  21  7  88 12  75 14  11 13  55 10  93  8  51
+ 6 100  2  52  3  54  1  37  5  26  4  74  0  87  8  13 12  88 10  94 14  73  7  55 11  68  9  50 13  88
+ 4  47  5  70  6   7  2  72  0  62  3  30  1  95 10  18  9  65  7  69 13  89  8  89 14  64 12  81 11  25
+ 6   1  1  10  0  72  3  59  4  92  5  53  2  89 14  52  7  48  8   8 13  69 10  49  9  26 12  76 11  97
+ 6  85  2  47  4  45  1  99  0  39  5  32  3  87 10  56  8  98 11  13  7  96 12  71 14  95  9  11 13  78
+ 0  17  2  21  3  87  6  41  5  41  4  31  1  96  8  17 11  95 13  29 14   3 10  71  7  64  9  97 12  31
+ 6   9  0  87  4  34  1  62  3  56  5  66  2  95  9  56 14  42  8  86  7  68 12  82 10  82 13  52 11  97
+ 3  86  1  37  2  49  0   2  6  30  5  63  4   4 14  47  8  84 10   5 13  13  9  39 12  18  7  76 11  63
+ 0  29  6  34  1  53  3   7  5  19  4  26  2  63 12  22 10  98 13  77 14  11  7  87  9   5 11  44  8  42
+ 6  44  4  91  1  91  2  58  0  77  3  51  5  14 13   1  9  17  7  55 12  40  8  95 14  31 11  54 10  37
+ 5  59  4  47  1  56  6  39  2   7  0  43  3  39 13  75 10  43 12  32  9   6 11  93  7  69  8  47 14  93
+ 4  24  1  30  3  97  6  17  0   7  2  55  5   8  7  70 10  87  8  29 12  20 13  29 11  51  9  14 14  32
+ 2  29  4  99  3  17  0  96  1  50  5  67  6  91 10  91 13  14 12  14  7  19  8  36 11  11 14  83  9   6
+ 0   7  6  60  3  31  5  76  1  23  2  83  4  30  8  73 14  76 11  17 10  53 13   9 12  72  7  89  9  24
+ 3  63  0  89  2   2  1  46  6  86  5  74  4   1  7  34  9  30 12  19 13  48 11  75  8  72 14  47 10  58
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/swv07.txt b/scalar-variable/job-shop-scheduling/data/jsplib/swv07.txt
new file mode 100644
index 0000000..c74eaea
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/swv07.txt
@@ -0,0 +1,25 @@
+#+++++++++++++++++++++++++++++
+# instance swv07
+#+++++++++++++++++++++++++++++
+# Storer, Wu, and Vaccari hard 20x15 instance (Table 2, instance 7)
+20 15
+ 3  92  1  49  2  93  6  48  0   1  4  52  5  57  8  16 12   6 13   6 11  19  9  96  7  27 14  76 10  60
+ 5   4  3  96  6  52  1  87  2  94  4  83  0   9 11  85 10  47  8  63  9  31 13  26 12  46  7  49 14  48
+ 1  34  6  34  4  37  2  82  0  25  5  43  3  11  9  71 14  55  7  34 11  77 12  20  8  89 10  23 13  32
+ 3  49  5  12  6  52  2  76  0  64  1  51  4  84 10  42 12   5  7  45  8  20 11  93 14  48 13  75  9 100
+ 2  35  1   1  3  15  6  49  5  78  4  80  0  99  9  88  7  24 11  20 10 100  8  28 14  71 13   1 12   7
+ 3  69  6  24  5  21  4   3  1  28  2   8  0  42 10  33 11  40  9  50  8   8 13   5 12  13  7  42 14  73
+ 0  83  4  15  2  62  6  27  5   5  1  65  3 100 14  65 10  82  7  89 13  81  9  92  8  38 11  47 12  96
+ 6  98  4  24  2  75  0  57  1  93  3  74  5  10  7  44 13  59 11  51 12  82 14  65 10   8  8  12  9  24
+ 4  55  0  44  3  47  5  75  2  81  6  30  1  42 10 100  8  81  7  29 13  31  9  47 11  34 12  77 14  92
+ 2  18  5  42  0  37  4   1  3  67  6  20  1  91  8  21 14  57 12 100 10 100 11  59 13  77  9  21  7  98
+ 3  42  1  16  4  19  6  70  2   7  0  74  5   7 12  50  9  74  8  46 14  88 13  71 10  42  7  34 11  60
+ 6  12  4  45  2   7  0  15  1  22  3  31  5  70 13  88  9  46  8  44 14  45 12  87 11   5  7  99 10  70
+ 4  51  5  39  0  50  2   9  3  23  6  28  1  49 13   5 12  17 14  40 10  30 11  62  8  65  7  84  9  12
+ 6  92  0  67  5  85  1  88  3  18  4  13  2  70  7  69 14  10 13  52  8  42 11  82 10  19 12  21  9   5
+ 4  34  0  60  1  52  5  70  2  51  6   2  3  43 10  75 11  45  8  53 12  96 13   1 14  44  7  66  9  19
+ 6  31  1  44  0  84  3  16  4  10  2   4  5  48 13  67 14  11 12  21  8  78  7  42 11  44  9  37 10  35
+ 1  20  4  40  3  37  2  68  6  42  0  11  5   6 10  44 11  43 12  17 14   3  7  77 13 100  9  82  8   5
+ 5  14  0   5  3  40  1  70  4  63  2  59  6  42  9  74 13  32  7  50 10  21 14  29 12  83 11  64  8  45
+ 6  70  0  28  3  79  4  25  5  98  2  24  1  54 12  65 13  93 10  74  7  22  9  73 11  75  8  69 14   9
+ 5 100  2  46  4  69  3  41  1   3  6  18  0  41  8  94 11  97 12  30 14  96  7   7  9  86 13  83 10  90
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/swv08.txt b/scalar-variable/job-shop-scheduling/data/jsplib/swv08.txt
new file mode 100644
index 0000000..24cc2b6
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/swv08.txt
@@ -0,0 +1,25 @@
+#+++++++++++++++++++++++++++++
+# instance swv08
+#+++++++++++++++++++++++++++++
+# Storer, Wu, and Vaccari hard 20x15 instance (Table 2, instance 8)
+20 15
+ 3   8  4  73  2  49  5  24  6  81  1  68  0  23 12  69  8  74 10  45 11   4 14  59  9  25  7  70 13  68
+ 3  34  2  33  5   7  1  69  4  54  6  18  0  38  8  28 12  12 14  50 10  66  7  81  9  81 13  91 11  66
+ 0   8  6  20  3  52  4  83  5  18  2  82  1  68  7  50 14  54 11   6 10  73 13  48  9  20  8  93 12  99
+ 2  41  0  72  1  91  4  52  5  30  3   1  6  92 13  52  8  41  9  45 14  43 12  97 10  64 11  71  7  76
+ 0  48  1  44  5  49  6  92  3  29  2  29  4  88 14  14 10  99  8  22 13  79  9  93 12  69 11  63  7  68
+ 0  56  6  42  2  42  3  93  1  80  4  54  5  94 12  80 14  69 11  39  8  85 10  95 13  12  9  28  7  64
+ 0  90  4  75  6   9  1  46  2  91  3  93  5  93 14  77  9  63 11  50 12  82 13  74  8  67  7  72 10  76
+ 0  55  2  90  6  11  3  60  4  75  1  23  5  74 11  54  7  97 12  32 13  67 10  15 14  48  8 100  9  55
+ 6  71  5  64  2  40  0  32  3  92  1  59  4  69 13  68 14  34 12  71  8  28  9  94  7  82 10   1 11  58
+ 6  36  4  46  1  50  5  87  3  33  2  94  0   3 14  60 11  45 13  84  9   1  8  38 10  22 12  39  7  50
+ 1  53  0  34  5  56  6  97  3  95  4  32  2  28 14  48  7  54 12  98  8  84  9  77 10  46 13  65 11  94
+ 2   1  5  97  0  77  4  82  6  14  1  18  3  74 14  52 11  14 12  93  9  35  8  34 13  84 10   6  7  81
+ 1  62  0  86  2  57  6  80  5  37  3  94  4  77  7  72  9  26 11  41 10   7  8  56 13  98 14  67 12  47
+ 5  45  3  30  0  57  6  68  1  61  2  34  4   2  7  57 13  96  9  10 12  85 14  42 10  93  8  89 11  43
+ 6  49  4  53  1  51  2   4  0  17  5  21  3  31 10  45 13  45  9  63 11  21  8   4  7  23 14  90 12   1
+ 6  68  5  18  0  87  3   6  4  13  2   9  1  40  8  83  7  95 12  27 10  94 14  68 11  22 13  28  9  66
+ 2  80  6  14  0  67  5  15  1  14  3  97  4  23  8  45 10   1 11   5 14  87  7  34 12  12  9  98 13  35
+ 4  33  2  20  3  74  6  20  5   3  0  90  1  37 13  56 12  38  8   7 14  84  9 100 11  41 10   6  7  97
+ 6  47  4  63  3   1  0  28  2  99  1  41  5  45 14  60 13   2  7  25  8  59  9  39 10  76 11  89 12   5
+ 6  67  2  46  3  25  1   2  5  22  4   8  0  22 13  64  7  82 12  99 11  79 10  87  8  71  9  24 14  19
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/swv09.txt b/scalar-variable/job-shop-scheduling/data/jsplib/swv09.txt
new file mode 100644
index 0000000..b7a6e4f
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/swv09.txt
@@ -0,0 +1,25 @@
+#+++++++++++++++++++++++++++++
+# instance swv09
+#+++++++++++++++++++++++++++++
+# Storer, Wu, and Vaccari hard 20x15 instance (Table 2, instance 9)
+20 15
+ 5   8  3  73  0  69  2  38  6   6  4  62  1  78  9  79  8  59 13  77 11  22 10  80 12  58 14  49  7  48
+ 3  34  4  29  2  69  0   5  5  63  1  82  6  94 14  17 11  94  9  29 10   5 13  75  7  15  8  61 12  61
+ 1  52  2  30  0  25  6  17  3  46  4  86  5   3 14  70 11  34  9  23 10  68 13  76  8  53 12  71  7   9
+ 2  50  4  20  3  24  0  53  1  97  5  79  6  92 14   3 12  52 10  75  9  74  8  59  7  75 13  84 11  99
+ 2  15  0  61  3  47  4  38  6  49  5  21  1   6 11   8  8  71 14  83 13  24 12  18  9  33  7  70 10 100
+ 4  48  5  50  2  66  0  92  6   2  3  58  1  23  9  84  8  66 10  12  7  36 14   4 12  88 13  64 11  12
+ 3  29  0  25  6  44  5  87  2  42  1  44  4  86  8  28 10  86  9  74 14  77 13  59 12  94  7  58 11  16
+ 4  31  3  58  0  94  5  69  2  44  1  93  6  92  9  80  8  63 12  47 13   3  7  79 11  39 14  80 10  75
+ 1  69  2  27  0  76  5  19  6  86  3  16  4  31 12  33  9  69 13  19 10  43 14   9 11  37  7  35  8  24
+ 2  75  3  78  6  41  4  60  5  59  0  42  1  60 12  18  8  31 10  15  7  54 14  60  9  20 11  61 13  69
+ 4  89  6  20  1  27  5  78  3   2  2  21  0  55 13  79 11  77 10  99  9  70 12  30  7  97  8  41 14  98
+ 6   1  2  10  4  84  5  72  0  14  1   9  3  51  7  22 14  65 10 100 13  65 11  43  8  10 12  14  9  19
+ 5  50  2  13  3  49  6  75  1  42  0  81  4  89  9 100 14  54 13  37 10   7 11  38  8  25 12  78  7  79
+ 2  44  3  77  5  26  1  42  4   9  6  73  0  60  9  61 10  85 12  14 11  92  7 100 14  49  8  46 13  12
+ 2  72  0  53  1  43  5  65  6  59  4  87  3  13  8  71 12  25  9  71 10  89 11   2  7  76 14  21 13  12
+ 2  60  6  28  5  33  1  36  0   6  3  96  4  48  9  40 11  79 10  60  8  39 13  34  7  54 12  20 14  52
+ 5  82  2  12  3  11  4  61  1  21  0  21  6  34 12  86 14  53  8   7  9   4  7  95 10  62 13  54 11  82
+ 5  72  0  13  3  46  6  97  1  87  4  87  2  11  7  45 14  85 11  66  8  43  9  39 13  34 10  30 12  55
+ 1  39  5  19  0  19  4  73  6  63  3  30  2  69  9  36  7  13 10  96 12  27 13  59 14  76 11  62  8  14
+ 1   7  4  14  3  79  2  27  6  43  0  96  5  24 11  30  7  27 12   2  8  69 14  75 13  34 10  79  9  96
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/swv10.txt b/scalar-variable/job-shop-scheduling/data/jsplib/swv10.txt
new file mode 100644
index 0000000..74681f1
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/swv10.txt
@@ -0,0 +1,25 @@
+#+++++++++++++++++++++++++++++
+# instance swv10
+#+++++++++++++++++++++++++++++
+# Storer, Wu, and Vaccari hard 20x15 instance (Table 2, instance 10)
+20 15
+ 3   8  2  73  1  79  0  95  6  69  4   9  5   5  8  85  9  52 11  43 14  32  7  91 10  24 13  89 12  38
+ 6  45  1  70  4  84  3  24  5  18  0  20  2  71  8  21  7  60  9  98 10  70 13  52 12  34 11  23 14  52
+ 6  16  4  68  1  85  0  39  5  40  2  98  3  61 10  77  7  60 11  73  9  66 14  84  8  16 13  43 12  88
+ 0  72  1  17  3  68  4  89  2  94  6  98  5  56 10  88 13  27  9  60 12  61  8   8  7  88 11  48 14  65
+ 6  78  2  24  5  28  0  73  4  21  1  69  3  52 14  32  8  83 11  48 10  29 13  48 12  92  9  43  7  82
+ 4  54  6  31  5  14  3  47  0  82  1  75  2   4  8  31 12  72  7  58  9  45 13  91 14  31 11  61 10  27
+ 4  88  1  28  5  92  6  62  3  93  0  14  2  65  7  33  9  44  8  31 14  32 11  72 13  47 12  61 10  34
+ 0  52  1  59  5  98  3   6  2  19  6  53  4  39  8  74 12  48 10  33 13  49 11  92  7  22 14  41  9  37
+ 0   2  6  85  3  34  2  51  4  97  5  95  1  73 14  61  9  28 12  73  8  21 11  85  7  75 13  42 10   7
+ 5  94  1  28  0  77  2  56  6  79  4   2  3  82  9  88 10  93 12  44 14   5  8  96  7  34 13  56 11  41
+ 2  15  5  88  6  18  3  14  1  82  0  58  4  33 13  19 10  42  9  36 14  57 12  85  7   3 11  62  8  36
+ 3  30  6  33  0  13  4   4  2  74  1  37  5  78 14   2 13  56  9  21 10  61 11  81  7  18  8  59 12  62
+ 5  40  1  75  6  45  0  41  3  97  2  65  4  92  7  11 12  44  8  40  9 100 11  91 14  66 13  53 10  27
+ 1  83  2  52  0  84  3  66  5   3  6   5  4  71 13  41 10  42 11  63 12  50 14  43  8   3  9  35  7  18
+ 4  44  0  26  1  59  6  81  2  84  5  81  3  91 13  41  7  42 11  53  8  63 14  89  9  15 10  64 12  40
+ 1  46  0  97  5  67  4  97  3  71  6  88  2  69 14  44 12  20 11  52 13  34 10  74  8  79  7  10  9  87
+ 3  71  6  13  4 100  2  67  1  57  5  24  0  36  7  88 14  79  8  21  9  86 12  60 11  28 10  14 13   3
+ 0  97  6  24  2  41  4  40  1  51  5  73  3  19  9  27 12  70 13  98 10  11 11  83  7  76  8  60 14  12
+ 5  88  3  48  1  33  4  96  6  10  0  49  2  52 10  38 13  49  7  31 12  94 14  23  9   7 11   5  8   4
+ 2  85  0 100  5  51  6  91  1  21  3  83  4  30 12  23  9  48  8  19 11  47 10  95  7  23 14  78 13  22
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/swv11.txt b/scalar-variable/job-shop-scheduling/data/jsplib/swv11.txt
new file mode 100644
index 0000000..c7640fd
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/swv11.txt
@@ -0,0 +1,55 @@
+#+++++++++++++++++++++++++++++
+# instance swv11
+#+++++++++++++++++++++++++++++
+# Storer, Wu, and Vaccari hard 50x10 instance (Table 2, instance 11)
+50 10
+ 0  92  4  47  3  56  2  91  1  49  5  39  9  63  7  12  6   1  8  37
+ 0  86  2 100  1  75  3  92  4  90  5  11  7  85  8  54  9 100  6  38
+ 1   4  4  94  3  44  2  40  0  92  8  53  6  40  9   5  5  68  7  27
+ 4  87  0  48  1  59  2  92  3  35  6  99  7  46  9  27  8  83  5  91
+ 0  83  1  78  4  76  3  64  2  44  8  12  9  91  6  31  7  98  5  63
+ 3  49  0  15  1 100  4  18  2  24  6  92  9  65  5  26  7  29  8  24
+ 0  28  3  53  4  84  2  47  1  85  7 100  5  34  6  35  8  90  9  88
+ 2  61  4  71  3  54  1  34  0  13  9  47  8   2  6  97  7  27  5  97
+ 0  85  2  75  1  33  4  72  3  49  7  23  5  12  8  90  6  87  9  42
+ 2  24  3  20  1  65  4  33  0  75  9  47  6  84  8  44  7  74  5  29
+ 2  48  3  27  4   1  0  23  1  66  6  35  7  46  9  29  5  63  8  44
+ 2  79  0   4  4  61  3  46  1  69  7  10  8  88  9  19  6  50  5  34
+ 0  16  4  31  3  77  2   3  1  25  8  88  7  97  9  49  6  79  5  22
+ 1  40  0  39  4  15  2  93  3  48  6  63  9  74  8  46  7  91  5  51
+ 4  48  0  93  2   8  3  50  1   5  6  48  7  46  9  35  5  88  8  97
+ 3  70  1   8  2  65  0  32  4  84  8   9  6  43  7  10  5  72  9  60
+ 0  21  2  28  1  26  3  91  4  58  9  90  6  43  8  64  5  39  7  93
+ 1  50  2  60  0  51  4  90  3  93  7  20  9  33  8  27  6  12  5  89
+ 1  21  3   3  2  47  4  34  0  53  9  67  8   8  5  68  7   1  6  71
+ 3  57  4  26  2  36  0  48  1  11  9  44  7  25  5  30  8  92  6  57
+ 1  20  0  20  4   6  3  74  2  48  9  77  8  15  5  80  7  27  6  10
+ 3  71  1  40  0  86  2  23  4  29  7  99  8  56  6 100  9  77  5  28
+ 4  83  0  61  3  27  1  86  2  99  7  31  5  60  8  40  9  84  6  26
+ 4  68  1  94  3  46  2  60  0  33  7  46  5  86  9  63  6  70  8  89
+ 4  33  1  13  2  91  3  27  0  38  8  82  7  31  6  23  9  27  5  87
+ 4  58  3  30  0  24  2  12  1  38  8   2  9  37  5  59  6  37  7  36
+ 2  62  1  47  4   5  3  39  0  75  7  60  9  65  8  61  6  77  5  31
+ 4 100  0  21  1  53  3  74  2   3  8  34  6   6  7  91  9  80  5  28
+ 1   8  0   3  2  88  3  54  4  18  9   4  6  34  5  54  8  59  7  42
+ 3  33  4  72  0  83  2  17  1  23  6  24  8  60  9  96  7  78  5  70
+ 4  63  2  36  3  70  0  97  1  99  6  71  9  92  5  41  8  73  7  97
+ 2  28  1  37  4  24  0  30  3  55  8  38  5   9  9  77  7  17  6  51
+ 3  15  0  46  2  14  4  18  1  99  9  48  6  41  5  10  7  47  8  80
+ 4  89  3  78  2  51  1  63  0  29  7  70  9   7  5  14  8  84  6  32
+ 4  26  1  69  2  92  3  15  0  23  8  42  6  95  5  47  9  83  7  56
+ 1  38  2  44  3  47  4  23  0  10  9  63  7  65  6  21  5  70  8  56
+ 3  42  4  85  1  29  0  35  2  66  9  46  8  25  5  90  7  85  6  75
+ 3  99  0  46  4  74  2  96  1  48  5  52  6  13  7  88  8   4  9  30
+ 1  15  3  80  4  47  2  25  0   8  9  61  7  70  8  23  6  93  5   5
+ 0  90  2  51  3  66  4   5  1  86  5  59  6  97  9  28  7  85  8   9
+ 0  59  1  50  4  40  3  23  2  93  7  61  9  96  8  63  6  34  5  14
+ 1  62  2  72  4  30  0  21  3  15  5  77  6  13  7   2  8  22  9  22
+ 2  20  4  14  3  85  1   4  0   2  9  33  7  90  5  48  8  90  6  62
+ 0  49  3  49  4  46  1  89  2  64  9  72  8   6  5  83  6  13  7  66
+ 4  74  1  55  2  73  0  25  3  16  7  19  9  38  6  22  5  26  8  63
+ 3  13  2  96  1   8  0  15  4  97  6  95  7   2  5  66  8  57  9  46
+ 4  73  1  97  3  39  0  22  2  90  9  64  6  65  8  31  5  98  7  85
+ 3  43  2  67  0  38  1  77  4  11  7  61  5   7  9  95  8  97  6  69
+ 0  35  2  68  1   5  3  46  4   4  7  51  6  44  5  58  9  69  8  98
+ 2  68  1  81  0   2  3   4  4  59  9  53  8  69  5  69  6  14  7  21
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/swv12.txt b/scalar-variable/job-shop-scheduling/data/jsplib/swv12.txt
new file mode 100644
index 0000000..0b67389
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/swv12.txt
@@ -0,0 +1,55 @@
+#+++++++++++++++++++++++++++++
+# instance swv12
+#+++++++++++++++++++++++++++++
+# Storer, Wu, and Vaccari hard 50x10 instance (Table 2, instance 12)
+50 10
+ 0  92  4  49  1  93  3  48  2   1  7  52  6  57  9  16  5   6  8   6
+ 4  82  3  25  2  69  1  86  0  54  6  15  5  31  9   5  7   6  8  18
+ 0  31  1  26  3  46  2  49  4  48  8  74  7  82  5  47  9  93  6  91
+ 0  34  4  37  1  82  3  25  2  43  6  11  9  71  5  55  7  34  8  77
+ 4  22  0  91  3  54  2  49  1  97  9   2  7  46  5  98  6  27  8  89
+ 2  46  3  70  1   3  0  44  4  24  9  65  6  60  5  94  8  58  7  22
+ 3  53  0  99  1  80  2  74  4  29  6  72  7  54  5  98  8  60  9  69
+ 3  96  1  87  0  36  2  57  4   7  8  36  9  26  5  94  6  47  7  70
+ 3   5  2  47  1  59  0  57  4  28  9  24  8  79  6  19  5  44  7  35
+ 0  96  1   4  3  60  2  43  4  39  7  97  5   2  9  81  6  89  8  91
+ 2  23  4  74  3  98  0  24  1  75  9  57  8  93  6  74  5  10  7  44
+ 3  36  4   5  2  36  0  49  1  90  8  62  5  74  9   4  6  85  7  53
+ 2  44  1  47  3  75  4  81  0  30  7  42  8 100  9  81  6  29  5  31
+ 1   2  0  18  3  88  2  27  4   5  5  36  7  30  6  51  8  51  9  31
+ 1  21  0  57  3 100  2 100  4  59  8  77  7  21  5  98  6  38  9  84
+ 4  97  2  72  1  70  3  99  0  42  6  94  5  59  9  90  8  78  7  13
+ 3  16  2  19  1  70  0   7  4  74  6   7  5  50  9  74  8  46  7  88
+ 3  45  4  91  2  28  0  52  1  12  5  45  6   7  7  15  9  22  8  31
+ 3  56  2   3  1   8  4  25  0  90  8  99  6  22  9  65  7  51  5  31
+ 0  23  3  28  1  49  2   5  4  17  7  40  9  30  5  62  8  65  6  84
+ 2  88  0  86  4   8  1  41  3  12  6  67  9  77  5  94  7  80  8  11
+ 4  81  3  42  0  19  2 100  1  10  5  23  9  71  8  18  6  93  7  36
+ 4  74  2  73  3  63  1   9  0  51  8  39  7   7  6  96  5  81  9  22
+ 1   1  3  44  0  66  4  19  2  65  7  10  6  23  8  26  9  76  5  77
+ 1  54  2  18  4  99  0  79  3  22  5   2  6  42  8  54  7  90  9  28
+ 3  16  4   1  1  28  0  54  2  97  5  71  6  53  8  32  7  26  9  28
+ 0  82  3   5  2  18  4  71  1  50  5  41  7  62  9  89  6  93  8  54
+ 2  63  3  59  0  42  1  74  4  32  5  50  6  21  7  29  8  83  9  64
+ 4  29  2  76  1   6  3  44  0   4  9  81  5  29  7  95  8  66  6  89
+ 3  55  4  84  1  36  0  42  2  64  5  81  8  85  6  76  7   4  9  16
+ 4 100  0  46  1  69  3  41  2   3  6  18  5  41  7  94  8  97  9  30
+ 3  34  4  35  2  18  1  58  0  98  9  78  8  17  5  53  6  85  7  86
+ 4  68  2  89  1  99  0   3  3  92  5  10  6  52  7  30  8  66  9  69
+ 0  21  3  65  4  19  2  14  1  76  9  84  6  45  5  24  8  54  7  73
+ 4  47  0  68  2  87  3  92  1  96  6  29  5  90  8  29  7  39  9 100
+ 2  35  0  60  4  61  1  61  3  72  9  57  8  94  5  77  7   1  6  53
+ 3  85  2  38  0  79  4  43  1  71  6  44  5  87  8  61  7  51  9  37
+ 1 100  2  33  3  94  0  59  4  25  5  88  9  50  6  19  8   4  7  66
+ 2   8  0  85  1  80  4  75  3   1  7  17  9  32  6  60  5  30  8  57
+ 4  25  2  98  1  94  3  49  0  34  9  37  7  80  6  50  8  25  5  72
+ 3  51  4  49  1  53  2   7  0  73  6  96  7  19  9  41  5  55  8  42
+ 0  57  1  86  2   1  4  61  3  66  6  28  5  56  7  68  8  21  9  65
+ 2  98  1 100  0  47  4  28  3   4  7  34  9  55  5  32  6  72  8  66
+ 4   2  0  74  2  20  1  39  3  63  5  88  9   3  7  22  6   8  8  73
+ 2  44  0   1  3  52  1  43  4   4  6  36  9  75  8  58  5  61  7  38
+ 2  21  4   6  3  32  1  74  0  57  5  72  8  10  9  34  6  91  7  94
+ 4  26  0  59  3  53  1  45  2  23  5  55  8  12  7  34  6  98  9  43
+ 2   4  1  53  4  57  3  95  0   6  6  30  8   1  7  92  9  20  5  86
+ 1  98  2  77  3  65  4  51  0  85  7  23  6  79  5  30  8  41  9  17
+ 4  58  2  43  3  14  0  74  1  64  7  37  8  78  6  33  9  42  5  80
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/swv13.txt b/scalar-variable/job-shop-scheduling/data/jsplib/swv13.txt
new file mode 100644
index 0000000..d9a724f
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/swv13.txt
@@ -0,0 +1,55 @@
+#+++++++++++++++++++++++++++++
+# instance swv13
+#+++++++++++++++++++++++++++++
+# Storer, Wu, and Vaccari hard 50x10 instance (Table 2, instance 13)
+50 10
+ 4  68  1  39  2  79  0  72  3  65  5  82  7  33  6  82  8  66  9  55
+ 2  14  3  45  0  18  4  72  1  27  7  57  6  90  8  19  9  19  5  50
+ 4  25  1  77  0  64  3  18  2  19  8  27  6  97  9  81  7  65  5  11
+ 3  70  0  29  2  31  1  39  4  62  8  12  9   2  5  91  7  98  6  91
+ 2  90  4  51  3  38  1  27  0  29  6  67  8  95  9  60  7  86  5  64
+ 4  90  0  55  3  69  1  76  2  97  7  94  5  57  8  65  9  80  6  24
+ 1  23  4  13  0  90  3  24  2  41  8  69  7   8  5  81  6  94  9  76
+ 3  19  1  37  0  16  4   4  2  68  6  45  8  79  9   4  7  30  5  33
+ 2  36  0  76  3  97  4  71  1  19  9  87  6  97  8  64  5  84  7  43
+ 2  20  1  77  0  71  3  73  4  47  7  88  5 100  9  16  8  69  6  77
+ 3  55  4  96  0   8  2  61  1  40  8  46  7  29  9  71  5  89  6  59
+ 2  21  0  18  3  37  4  97  1  59  7  79  6   2  5  80  8  85  9  59
+ 4  19  1  83  2   1  0  95  3  48  9  37  7  59  5  56  8  57  6  81
+ 0   8  1  60  4  91  3  85  2  27  9  39  5  31  6  62  7  94  8  12
+ 4   2  3  10  0  17  1  38  2  96  6  21  9  81  8  64  5  76  7  46
+ 2  46  1   4  4  25  3  41  0  11  5  96  9  56  6  10  7  25  8  32
+ 0  21  1  77  4  22  2  72  3  53  9  28  7  23  5   2  8  52  6  83
+ 3   9  4  37  0   2  2  74  1  15  8  26  5  83  6  90  7  51  9  80
+ 3   6  1   7  0  57  2   4  4  56  7  11  5  57  8  12  6  94  9  29
+ 1  40  2  93  3  65  4  66  0  96  9   5  7  32  8  85  5  93  6  94
+ 1  38  2  19  4  22  0  73  3   7  5  63  8  28  6  23  9  11  7  84
+ 1  96  4  10  0  29  3  59  2  94  5  26  7  22  8  52  6  37  9  50
+ 1  38  3  31  2  76  0   8  4   8  6  50  5  95  8   5  9  25  7  62
+ 0  15  2  84  4 100  3  76  1  66  7  56  5  95  8  94  6  56  9  85
+ 3  73  2  38  1  84  0  42  4  37  5  16  7  24  9  59  6  60  8  23
+ 3  43  1  79  0  80  2  44  4  65  5  81  7   7  8  93  6  55  9  34
+ 2   8  4   2  0  12  3  55  1  60  9  91  6   6  5  83  8  31  7  91
+ 0   8  4  46  3  47  2  57  1  47  9  55  8  74  7  98  6  54  5  51
+ 2  56  4  90  1  41  0  35  3  62  7   4  5  15  9  89  6  73  8  66
+ 0   2  4  39  3  44  1  68  2  54  7   7  8  76  9  29  5  90  6  53
+ 2  34  0  94  3   1  1  23  4  45  8  83  7  84  5  49  6  67  9  49
+ 4   4  2  70  1  19  0  19  3  92  5  70  7  33  9  50  8  82  6  48
+ 4  64  2  76  0  70  3  83  1  91  7  98  8  37  5   3  9  75  6  92
+ 3  96  1  17  0  20  4  13  2  28  7  21  9  65  5  87  6  54  8  98
+ 0  68  4  40  3  98  2  90  1  38  7  45  8  21  5   9  9   3  6  47
+ 0  58  4  19  2  16  3  74  1  32  9  32  5  58  6  93  7   1  8  80
+ 0  32  2  99  1  95  3   2  4   8  9  55  6  32  8  26  5   6  7  68
+ 3   7  4  45  2  19  0  97  1  56  7  22  9  72  8  98  5  59  6  20
+ 2  97  4  98  3  43  0  28  1  23  5   3  8  75  9  43  7  58  6  71
+ 3  31  0  88  2  88  1  82  4  65  5  53  9  15  7  68  6  60  8  99
+ 4   4  0 100  2  95  1  11  3  28  5  80  7  25  9  87  6  25  8   9
+ 0  75  3  10  4  59  2  80  1  60  5  75  8  87  6  33  9  10  7  31
+ 0  54  3   6  4   7  1  72  2  49  7  72  8  64  6  32  9  86  5  69
+ 4  15  3  19  1  18  0  84  2  96  9  71  8  64  6  38  5  58  7  62
+ 1  32  4  80  2  83  3  83  0  50  5  81  7  82  9  33  8  10  6  55
+ 0  65  4  95  3  84  2  64  1  18  9  27  6  70  7  74  5  87  8  68
+ 1  50  2  49  0  96  3   1  4  89  8  42  5  88  9  91  6  64  7   3
+ 3  44  0  91  1   5  2 100  4  77  6  20  5  13  7  25  9  71  8  71
+ 0  86  4  91  1  19  2  69  3  71  5  13  8  87  6  98  9  43  7  13
+ 4   8  0  60  3  31  2  93  1   8  9   1  7  19  6   8  5  85  8  24
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/swv14.txt b/scalar-variable/job-shop-scheduling/data/jsplib/swv14.txt
new file mode 100644
index 0000000..fc342b7
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/swv14.txt
@@ -0,0 +1,55 @@
+#+++++++++++++++++++++++++++++
+# instance swv14
+#+++++++++++++++++++++++++++++
+# Storer, Wu, and Vaccari hard 50x10 instance (Table 2, instance 14)
+50 10
+ 4  69  0  37  3  64  1   1  2  65  9  34  5  67  8  43  7  72  6  79
+ 1  11  0   7  3  68  4  43  2  52  6  29  9  71  7  81  8  12  5  36
+ 4  90  3  29  1   1  2   1  0  14  8  38  5  13  9  21  7  41  6  97
+ 1  46  0  26  4  83  2  36  3  20  9   4  8  23  7  65  5  56  6  42
+ 4  46  0  39  2  92  3  53  1  62  9  68  7  65  8  74  6  87  5  46
+ 4  13  1  44  3  43  2  67  0  75  6   5  9  94  5  95  7  28  8  85
+ 1   1  2  99  4  36  3  86  0  65  8  32  5  17  7  71  6  15  9  61
+ 2  18  4  63  3  15  0  59  1  33  7  95  5  63  6  85  8  34  9   3
+ 4  13  2  25  0  82  3  23  1  26  7  22  9  35  8  16  6  24  5  41
+ 3   1  1   7  0  21  2  73  4  39  6  32  7  77  5  29  8  89  9  21
+ 1  53  3  27  4  55  0  16  2  64  5  78  9  32  8  60  7  20  6  20
+ 1  71  2  54  3  21  0  20  4  23  9  40  5  99  7  61  6  94  8  71
+ 2  76  4  72  3  91  0  75  1   7  6  53  8  32  7  71  5  63  9  53
+ 2  12  1   3  4  35  0  64  3  30  5  94  8  67  7  31  6  79  9  14
+ 4  63  1  28  3  87  0  89  2  52  8   2  9  21  7  92  6  44  5  37
+ 0  79  1  65  4  35  3  78  2  17  8  90  5  54  9  91  7  57  6  23
+ 3  20  1  93  4  61  0  76  2  23  5  10  8  34  7  20  9  87  6  77
+ 0  37  2  17  1  92  4  30  3  59  5  47  8   7  7  45  6  13  9  60
+ 4  90  3  74  0  46  2  36  1   2  6   9  5  83  8  90  7  88  9  39
+ 3  83  0  85  2  20  4  88  1  94  6  14  5  16  7  62  9  53  8   9
+ 0   4  4  16  2  64  1  60  3  79  5  37  6  49  7  67  9  95  8   5
+ 3  32  0  86  1   5  4  66  2  77  7  15  5  68  9  40  8   1  6   4
+ 0   2  1  48  4  23  3  25  2  58  9  55  7  14  8  21  6  85  5  27
+ 1  71  4  92  3  99  2  56  0  81  7  79  6  66  9  42  8  47  5  43
+ 1  77  4  85  3  72  2  19  0  71  5  34  7   9  9  14  6  62  8  58
+ 4  38  0   3  2  61  3  98  1  76  5  14  9  56  8  26  7  43  6  44
+ 1  68  4  54  0  62  2  93  3  22  6  57  7  79  9  19  5  77  8  45
+ 2  62  1  96  4  56  0  68  3  24  5  41  6  19  7   2  8  73  9  50
+ 2  86  0  53  3   3  1  89  4  37  7 100  5  59  9  23  6  19  8  35
+ 3  90  4  94  0  21  2  78  1  85  5  94  6  90  8  28  9  92  7  56
+ 4  85  2  97  0   8  3  27  1  86  9  26  7   5  8  96  5  68  6  57
+ 0  58  3   4  4  49  2   1  1  79  8  10  6  44  9  87  5  16  7  13
+ 3  85  0  24  4  23  1  41  2  59  8  20  6  52  5  58  9  75  7  77
+ 0  47  1  89  2  68  4  88  3  17  6  48  8  84  9 100  5  92  7  47
+ 1  30  0   1  3  61  4  20  2  73  8  78  7  41  9  52  5  43  6  74
+ 0  11  4  58  3  66  2  67  1  18  8  42  7  88  9  49  5  62  6  71
+ 4   5  2  51  3  67  1  20  0  11  7  37  6  42  8  25  9  57  5   1
+ 0  58  4  83  2   9  3  68  1  21  6  28  9  77  5  19  7  32  8  66
+ 3  85  2  58  0  65  1  80  4  50  7  79  5  43  8  29  9   9  6  18
+ 3  74  2  29  0  11  1  23  4  34  7  84  8  57  5  77  6  83  9  82
+ 2   6  4  67  0  97  3  66  1  21  8  90  9  46  6  12  5  17  7  96
+ 4  34  1   5  2  13  0 100  3  12  8  63  7  59  5  75  6  91  9  89
+ 1  30  2  66  0  33  3  70  4  16  6  80  5  58  8   8  7  86  9  66
+ 3  55  0  46  2   1  1  77  4  19  7  85  9  32  6  59  5  37  8  69
+ 2   3  0  16  1  48  4   8  3  51  7  72  6  19  8  58  9  59  5  94
+ 3  30  4  23  1  92  0  18  2  19  9  32  6  57  5  50  7  64  8  27
+ 2  18  0  72  4  92  1   6  3  67  8 100  6  32  9  14  5  51  7  55
+ 4  48  0  87  1  96  2  58  3  83  8  77  5  26  7  77  9  72  6  86
+ 1  80  4   5  0  50  3  65  2  85  7  88  5  47  6  33  8  50  9  75
+ 1  78  0  96  4  80  3   5  2  99  9  58  5  38  7  29  8  69  6  44
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/swv15.txt b/scalar-variable/job-shop-scheduling/data/jsplib/swv15.txt
new file mode 100644
index 0000000..ae07550
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/swv15.txt
@@ -0,0 +1,55 @@
+#+++++++++++++++++++++++++++++
+# instance swv15
+#+++++++++++++++++++++++++++++
+# Storer, Wu, and Vaccari hard 50x10 instance (Table 2, instance 15)
+50 10
+ 2  93  4  40  0   1  3  77  1  77  5  16  9  74  8  11  6  51  7  92
+ 0  92  4  80  1  76  3  59  2  70  5  86  9  17  6  78  7  30  8  93
+ 1  44  2  92  3  96  4  77  0  53  9  10  7  49  5  84  8  59  6  14
+ 1  60  2  19  3  76  0  73  4  85  7  13  8  93  5  68  9  50  6  78
+ 2  20  0  24  3  41  1   2  4   4  9  44  7  79  8  81  5  16  6  39
+ 3  41  2  35  1  32  4  18  0  15  8  98  6  29  5  19  7  14  9  26
+ 1  59  0  45  4  53  3  44  2  98  5  84  6  23  7  45  8  39  9  89
+ 1  30  4  51  3  25  0  51  2  84  6  60  5  45  7  89  8  25  9  97
+ 0  47  3  18  2  40  4  62  1  58  5  36  7  93  8  77  9  90  6  15
+ 3  33  1  68  0  41  4  72  2  20  6  69  7  47  5  22  9  47  8  22
+ 2  28  1 100  4  20  0  35  3  26  5  24  9  41  6  42  7 100  8  32
+ 0  65  2  12  4  53  3  93  1  40  8  18  7  23  5  60  6  89  9  53
+ 0  58  1  60  4  97  3  31  2  50  9  85  5  64  7  38  6  85  8  35
+ 3  64  0  58  1  49  2  45  4   9  8  49  6  22  5  99  9  15  7   7
+ 0  10  4  85  3  72  2  37  1  77  5  70  7  45  9   8  6  83  8  57
+ 4  93  0  87  1  87  2  18  3   4  8  78  5  67  9  20  6  17  7  35
+ 4  72  0  56  3  57  2  15  1  45  6  41  5  40  9  85  8  32  7  81
+ 0  36  3  63  4  79  2  32  1   5  6  25  7  86  9  91  5  21  8  35
+ 2  83  4  29  0   9  1  38  3  73  7  50  9  99  5  18  8  29  6  41
+ 0 100  3  29  2  60  4  63  1  64  8  71  6  35  5  26  9   9  7  22
+ 1  81  0  60  3  62  4  48  2  68  7  28  5  69  8  92  6  79  9  10
+ 0  40  4  80  1  41  2  10  3  68  8  28  9  51  7  33  6  82  5  25
+ 4  30  2  12  0  35  3  17  1  70  9  29  7  18  8  93  6  94  5  37
+ 1  36  2  41  3  27  4  36  0  78  7  64  6  88  5  25  9  92  8  66
+ 2  65  3  27  4  74  0  32  1  40  5  88  8  73  6  92  7  83  9  42
+ 0  48  1  85  2  92  4  95  3  61  8  72  9  76  5  58  7  11  6  89
+ 3  84  2  50  0  70  4  24  1  42  9  55  5 100  6  70  7   4  8  68
+ 0  95  4  41  2  11  3  98  1  85  5  64  6   8  7  26  8   6  9   6
+ 0  84  2  49  1  17  3  69  4  55  8  75  6  45  9  38  7  59  5  28
+ 2  48  0  29  4   1  1  64  3  41  5  23  7  64  9  31  6  56  8  12
+ 2  81  4  25  3  33  0  22  1  50  5  74  9  56  8  33  7  85  6  83
+ 1  62  4  25  0  21  2  20  3   8  6  36  9   9  5  91  8  90  7  49
+ 1  43  0  16  2  91  3  96  4  24  5  11  9  91  7  41  8  35  6  66
+ 1  91  2  20  4  44  0  42  3  87  9  57  6  15  5  38  8  42  7  89
+ 0  33  3  95  4  68  2  22  1  80  7  53  8  13  9  70  5  22  6  69
+ 0  15  3  47  1  24  2  31  4  41  8  14  9  28  7  59  5  52  6  39
+ 2  95  0  42  4   5  1  57  3  67  6  30  9  21  8  70  5   9  7  20
+ 2  54  0  15  1  20  3  64  4  83  9  40  7   6  5  89  6  91  8  48
+ 0  22  4  27  1  77  3  25  2  16  8  72  9  61  6  75  7  4   5  19
+ 3  68  1  82  2  16  0  83  4   2  7  10  8  88  5  41  9  21  6  66
+ 1  64  0  76  2  85  3  71  4  97  5  97  7   8  6  40  8  70  9  35
+ 0  94  1  45  2  94  4  84  3  44  8  41  5  30  7  47  6  19  9  22
+ 2  23  1  10  0  82  3  93  4  90  8  67  7   9  9  18  5  22  6  87
+ 0  75  2  27  4  97  3   9  1  57  9  14  5  50  7  31  8  62  6  23
+ 1  42  3  41  2  35  0  75  4  18  9  65  7  38  6  38  8  51  5  56
+ 4  72  1  63  0  33  2  27  3  41  5  52  7  42  9  10  6  14  8  71
+ 2  91  1  89  0  44  4  91  3  26  6  49  5  22  8  31  9  69  7   5
+ 3  42  1  34  0   4  4  34  2  16  6  86  7  25  8  99  5  67  9  25
+ 4  34  1  93  0  26  3  81  2   9  7  96  8  79  9  68  5  76  6  10
+ 3  19  1  47  4  13  2  98  0  32  7  12  9  45  6  52  8  49  5  34
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/swv16.txt b/scalar-variable/job-shop-scheduling/data/jsplib/swv16.txt
new file mode 100644
index 0000000..37d2312
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/swv16.txt
@@ -0,0 +1,55 @@
+#+++++++++++++++++++++++++++++
+# instance swv16
+#+++++++++++++++++++++++++++++
+# Storer, Wu, and Vaccari easy 50x10 instance (Table 2, instance 16)
+50 10
+ 1  55  3  46  5  71  8  29  0  47  2  12  7  57  4  79  6  91  9  30
+ 2  96  6  94  8  98  0  55  3  10  1  95  5  95  7  37  9  82  4   2
+ 6  43  3  93  8  30  2  41  0  23  1  60  7  14  4  15  5  42  9  56
+ 0  45  6  85  2  59  7  76  1  93  9  62  4  33  8  46  5  33  3  35
+ 2  45  3  36  8  11  6  96  7  96  1   8  0  75  5   6  4  13  9   2
+ 9  51  7  75  0   4  3  13  5  12  1   4  2  38  6  30  4  42  8  28
+ 9  58  4  33  6  77  2  11  3  37  8  64  5  94  7  89  1  96  0  93
+ 6  37  3  67  0  88  9  92  8  19  4  27  7  46  1  58  2  60  5  55
+ 4  60  2  88  0  23  5  69  8  60  1  32  7   4  6  56  9  25  3  14
+ 2  98  5  56  1  68  6  63  7  61  3  78  8  45  0  62  4  31  9  70
+ 7  66  8  80  0  18  3  97  9  47  5  38  1  26  2   8  6  90  4  90
+ 0  16  7   6  4  53  6  86  5  81  8  49  3  90  2  57  1  34  9  56
+ 2  69  8  65  5  20  4  15  1  61  3  71  6  71  9  58  0  24  7  71
+ 4  84  5  20  9  58  0  55  8  98  2  75  7  46  3  81  1  71  6  46
+ 5   6  6  58  7  90  1  54  9  73  0  92  4  39  3  23  2 100  8  18
+ 2  32  5  58  6  97  1  49  3  61  0  69  8   2  4   3  9  32  7  46
+ 0  78  7  14  4  98  3  26  8  25  9  45  6  12  2  98  1  99  5  69
+ 2  50  1  95  4  82  9  25  0  68  8  83  5  36  7  78  3  35  6  27
+ 6  29  7  20  8  55  4  14  2  66  5  52  0  75  9  63  1  93  3  64
+ 1  11  0  18  9  42  4  81  7   2  2  39  3  83  6  11  5  38  8  52
+ 4  11  8  99  9   2  7  10  3  91  5  83  6  61  0  21  2  69  1   8
+ 9  11  7  65  1  14  2  85  3   5  8   5  5  11  4  47  6  67  0  41
+ 9  60  7   9  8  16  2   4  5  34  6   2  4  30  1  32  0  51  3  51
+ 9  31  2  41  1  13  6  28  5  97  3   8  7  42  4  95  8  46  0  93
+ 4   1  6  91  8  49  3  75  1  19  7 100  0  58  2  14  5  34  9  82
+ 3  28  5  68  9  30  7  68  1  10  6  20  8  47  4  51  0  44  2  32
+ 9  86  3   9  1  80  0  89  5  93  4  12  8  13  7  10  6  18  2   4
+ 0  22  5  12  8  95  4  24  3  30  1  81  2  21  7  28  9 100  6  27
+ 1  87  0  68  2  64  3  33  7  59  5  95  6   1  9  14  8  82  4  43
+ 2  14  6  98  0  86  1  85  8  85  5  12  4  99  7   8  3  21  9   7
+ 5  47  9  90  0  88  1  52  8  43  4  62  7  33  3  51  6  97  2  22
+ 2  59  7  26  4  76  0  26  3  71  8  59  1  73  9  70  5  57  6  10
+ 6  92  2  10  9  45  0  11  1  53  3  35  8  76  4  83  7  55  5  79
+ 9  96  4   3  3  92  7  67  6  60  8  35  5  70  0  52  2  39  1  94
+ 4  65  0  17  9  26  7  46  5  81  1  42  2  64  6  46  3  96  8  59
+ 9   6  3  21  8  46  0  82  2  74  5  56  7  94  6  83  4  63  1  21
+ 6  89  5  23  8  78  2  33  9   4  7  97  3  60  1  29  0  79  4  93
+ 0  46  1  46  4  20  7  91  2  76  9  83  3  14  6  61  5  84  8  76
+ 7  82  8  43  6  76  1  36  0  27  9  93  5  71  4  81  2  45  3  62
+ 7  51  9  27  5  12  6  52  4  85  8  66  0 100  3  44  2  82  1  36
+ 3  75  7  13  6  63  1  78  4   1  8  60  2  24  5  10  9  56  0   3
+ 5  48  4  32  2  82  0   1  1   2  7  35  3  16  9  67  8  74  6  39
+ 7  24  0   8  8  96  3  59  2  41  4  23  1  37  9   4  5  69  6  27
+ 1  23  9   3  2  85  6  93  5  18  7  47  0  96  8   6  4  60  3   3
+ 6  99  2  14  9  16  3  81  8  89  1  53  7  86  4  39  5   3  0  87
+ 5  67  8  53  0  77  4  69  2  55  3  78  6  95  1  76  7   2  9  71
+ 1   5  6  89  0  37  3  88  7  20  9   4  4  77  8  27  5  31  2  47
+ 1  66  2  55  4  15  7  35  3  76  9  91  6  35  5  37  8  54  0  33
+ 3  79  5   2  6  17  1  65  7  27  8  53  4  52  9  35  0  23  2  59
+ 9 100  0  55  5  14  2  86  4  69  3  87  8  46  1   3  6  89  7 100
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/swv17.txt b/scalar-variable/job-shop-scheduling/data/jsplib/swv17.txt
new file mode 100644
index 0000000..ca88d9f
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/swv17.txt
@@ -0,0 +1,55 @@
+#+++++++++++++++++++++++++++++
+# instance swv17
+#+++++++++++++++++++++++++++++
+# Storer, Wu, and Vaccari easy 50x10 instance (Table 2, instance 17)
+50 10
+ 7   9  2  57  9  62  5  34  6  83  0  33  1  80  4  46  3  21  8  89
+ 9  82  1  35  8  37  5  26  6  21  3  78  7  64  4  33  2  40  0  21
+ 7  14  5  49  3  48  9  34  4  52  1  16  2  78  0  24  8  58  6  43
+ 2  94  3  86  8  41  5  27  7  29  6  53  9   5  0  36  4  98  1  37
+ 7  55  1  87  8  51  5  29  9  93  3  51  0  54  6  85  2  20  4  29
+ 2  88  1  98  3  67  8  41  6  23  9  70  7  26  4  28  5  17  0  87
+ 2  78  0  18  4  43  3  86  9  78  6  43  7  62  8  42  1  44  5   9
+ 9  37  4  89  3  26  6  59  0  89  5  90  1  91  8  28  7  37  2  51
+ 3  82  2  31  1  98  5  25  0  16  7  23  9  92  4  89  6  32  8  12
+ 6  66  1  58  5  14  3  42  0  62  8  66  4  46  7  88  2  89  9  97
+ 8  94  9  11  6   3  1  86  2   4  5  19  7  93  4  43  0  78  3  11
+ 5  22  1  87  9  61  2   2  3  15  6  37  7  81  0  17  8  31  4  73
+ 6  28  0  86  3  54  2  68  4  63  1  33  8  22  5  35  9  84  7  15
+ 6  18  1   2  2  23  8  49  7  82  9   8  4  73  5  31  3  20  0   1
+ 7  49  5   8  2  36  8  31  6  47  3  90  0   7  9   6  1  44  4  51
+ 4  43  1  95  0  18  9  99  7  98  3  26  8  99  5  90  2  24  6  91
+ 1  49  6  69  3  73  9  52  0  10  7  41  8  42  5  96  4  85  2  76
+ 0   5  1  69  3  38  7  35  5  23  2  40  8  17  4  33  6  99  9  82
+ 3  42  1  93  4  90  6  88  2  70  8  11  9  54  7  76  5  40  0  94
+ 5  88  9  44  0  63  7  92  1   4  4  91  6  92  8  53  3  52  2  38
+ 5  83  3  75  1  44  2  79  7  63  6  32  0  10  4   2  9   6  8  56
+ 7  71  0  23  5  93  3  44  6  36  4  27  2  96  1  23  9  35  8  21
+ 5  42  2  43  6  37  9  98  0  55  3  35  4  45  1   8  8   5  7 100
+ 0  40  8  34  2   7  9  17  5  60  4  98  7  34  6  23  1  37  3  58
+ 9  87  2  39  3  23  8  48  6  83  7  50  5   9  1  49  0  37  4  42
+ 6  60  5   3  2  60  7  40  0  54  1  68  4  49  8  50  9  22  3  34
+ 5  22  1  55  2  32  0  83  8  38  4  22  6  29  7  23  9  59  3  90
+ 9  51  2  27  6  81  8  87  0  79  7   1  3  14  5  73  4  25  1  14
+ 6  88  1  46  5  16  2  62  9  95  7  63  4  78  0   9  3  68  8  37
+ 4  77  2  13  8  96  3  61  0  21  7  39  5  12  6  49  9  73  1  86
+ 7  91  5  14  3  37  0  17  9  49  4  27  1  68  2  60  6  42  8  15
+ 9  13  4  25  6  62  0   4  1  31  8  76  5   3  7   8  3  26  2  95
+ 7  45  5  50  1  14  0  69  9  43  4   1  6  73  8  35  3   1  2  61
+ 4  57  1   1  0  74  8   1  6  96  2  92  7  85  5  42  3  12  9  38
+ 7  49  5  31  8  79  6  83  1  40  4  65  3  34  2  32  9  97  0  25
+ 9  24  5  40  4  81  3  10  6  59  8  83  2  66  1  28  7  33  0  31
+ 5  33  4  39  3  50  1  96  7  62  2  72  8  42  6  86  9  66  0  80
+ 3  88  7  47  0  35  4  69  1  79  9  61  2  25  8  56  5  68  6  96
+ 9  23  6  95  0  42  1  84  8  57  4  42  2   2  5  79  3  29  7  90
+ 9  96  8  21  4  17  7  12  1  25  2   9  6   7  5  26  0  81  3  51
+ 1  63  7  16  6  40  2  22  9  48  5  87  0  15  8  24  3  37  4  55
+ 7  95  0  60  3  62  2   7  9   2  8  81  5  83  4  64  1  68  6  66
+ 3  24  7  60  6  35  2  77  1  85  8  57  9  29  5  59  4  53  0  14
+ 1  24  6  30  0   9  3  89  8  72  4  77  2   7  5  23  9  73  7  35
+ 0  66  8  12  1   9  5  50  2  14  9  76  4  90  3  43  7  48  6  63
+ 3  97  1  29  0  59  4  64  9  17  2  77  5  60  7  16  6  61  8  40
+ 9   5  4  22  2   3  8  63  5   1  7  23  0   1  3  61  1  92  6  19
+ 6  91  8  74  1  88  5   2  7  61  4  39  0  35  2  23  9  84  3  27
+ 8  87  5  58  7  44  1   6  6  22  3  57  9  78  4  19  2  74  0   6
+ 4   6  1  94  0  45  2  54  9  67  7  90  5  19  8  72  6  70  3  58
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/swv18.txt b/scalar-variable/job-shop-scheduling/data/jsplib/swv18.txt
new file mode 100644
index 0000000..8f2d614
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/swv18.txt
@@ -0,0 +1,55 @@
+#+++++++++++++++++++++++++++++
+# instance swv18
+#+++++++++++++++++++++++++++++
+# Storer, Wu, and Vaccari easy 50x10 instance (Table 2, instance 18)
+50 10
+ 7  35  6  23  2  92  4   5  5  40  1  90  3  30  9  35  8   8  0  86
+ 2  60  3  97  8  21  9  70  7  82  0  12  4   3  5  45  1  75  6  69
+ 7  96  2  38  0  61  1  55  4  31  5  48  9  79  3   4  6  12  8  29
+ 4  83  7  82  8  97  1  43  0  95  6  92  2  18  3  29  5   4  9  67
+ 3  46  9  80  8  66  2  38  4  95  1  40  7  89  0  32  6  64  5   1
+ 6  57  4  80  8  68  7  27  0  90  5  45  3  98  9  59  1   6  2  94
+ 5  50  0  91  2  97  9  63  7  52  3  48  4   4  8  96  1  18  6 100
+ 7  23  6  43  3  25  8  83  2  76  9  41  1  88  0  31  5  44  4  13
+ 2  20  3  90  9  20  4  42  8  72  5  46  1  27  0  81  6  40  7  34
+ 7  80  5  97  0  42  2  49  9  10  1  10  3  71  4  71  6  14  8  98
+ 2  79  3  29  0  96  7  66  1  58  8  31  4  47  5  76  6  59  9  88
+ 8  93  6   3  1   7  3  27  5  66  7  23  0  60  4  97  2  66  9  55
+ 9  12  8  39  4  77  5  79  0  26  7  58  2  98  6  38  3  31  1  28
+ 6   8  9  48  4   4  1  87  3  38  2  28  8  10  0  19  7  82  5  83
+ 5   6  9  13  2  86  6  19  3  26  7  79  0  55  1  85  8  33  4  30
+ 3  37  8  26  7  29  6  74  9  43  5  17  0  45  2  28  1  58  4  15
+ 7  15  3  37  6  21  5  47  2  90  0  37  9  33  1  42  4   7  8  62
+ 8  49  4  46  1  28  7  18  6  41  2  57  0  75  3  21  9   3  5  32
+ 6  98  1  30  8  24  4  91  9  73  7  25  5  49  0  40  2   9  3   4
+ 6  33  3  94  1  21  2  90  9  86  7  85  5  29  0  17  4  94  8  90
+ 6   3  4  85  1  66  7  61  8  57  3  84  2   5  9  40  0  54  5  70
+ 7  81  1  98  2  45  0  18  6  65  9   1  4  98  3  30  8  84  5  82
+ 6  40  7  77  3  72  1  97  5  39  4  21  0  59  8  42  9  90  2  26
+ 5  57  3  63  1  14  4  64  6  23  8  78  2  54  0  51  9 100  7  96
+ 5  61  1  55  6  73  2  87  4  35  3  41  7  96  0  32  8  91  9  60
+ 9  19  5  90  8  91  0  45  3  66  2  84  1  61  7   3  6  84  4 100
+ 2  33  9  72  6  27  8  14  3  59  0  39  7  20  5  29  4  54  1  88
+ 4  45  0  18  3  73  2  26  8  55  6  22  7  27  1  46  9  43  5  77
+ 2  57  9  16  1  71  8  25  7  50  3  41  6  58  5  71  4   9  0  32
+ 8  48  9  32  0  42  3  73  1  56  7  53  6   3  5  66  4  15  2  44
+ 6  69  7  14  1   2  8  40  4  70  9  90  3  38  2  31  5  55  0  50
+ 9 100  8  14  0  55  2   5  5  12  4  79  1  68  3  83  6  89  7  78
+ 4  26  5  44  8  39  1  84  7  64  9  98  3  38  2   2  6  27  0  18
+ 3  98  2  10  9  99  8  50  0  20  6  12  4   7  1  57  7  87  5  89
+ 0  64  8  63  7  98  5  31  1  30  6  62  3  11  4  89  9  31  2  34
+ 3  26  6  43  4  69  7  27  8  92  2  51  1  10  5  29  9  21  0  37
+ 8  21  5  98  0  64  6  38  2  23  1  13  7  89  9  89  4  21  3  27
+ 4  39  7  32  1  67  0  33  5  16  2  43  6  62  3  42  9  70  8  90
+ 7  73  9  45  3  37  0  45  2  61  6  25  5  15  4   5  8  58  1  98
+ 7  94  0  17  6  15  5  81  9  64  3  62  1   2  8  16  2  35  4  40
+ 5  32  6  37  9  11  0  25  1  37  8  21  2  76  7  52  4  56  3  87
+ 3  23  2  40  1   6  7  31  6  25  9  98  8  29  4   4  5  25  0  33
+ 8  96  9  30  1  95  3   2  6   3  2  22  0  62  4  30  7   1  5  99
+ 9  54  5   3  0  78  2  43  6  90  7  88  4   1  8  97  1  30  3  96
+ 5  29  6  60  3  80  1  94  2  67  0  42  8  17  9  27  7  75  4  86
+ 1  17  5  62  2  25  7  80  6  62  9  19  8  81  3  73  0  57  4  90
+ 9  31  3  54  5  28  1  19  4   4  2  34  8  64  6  46  7  60  0  27
+ 9  95  7   1  2  43  3   6  4   7  8  66  1  45  5  13  0  80  6   1
+ 3  20  7  82  0  87  1  65  6  64  8  61  2  21  5  32  9  16  4  37
+ 0  49  3  54  2  31  8  69  1  21  5   2  6  73  9  35  4  66  7  82
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/swv19.txt b/scalar-variable/job-shop-scheduling/data/jsplib/swv19.txt
new file mode 100644
index 0000000..6363008
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/swv19.txt
@@ -0,0 +1,55 @@
+#+++++++++++++++++++++++++++++
+# instance swv19
+#+++++++++++++++++++++++++++++
+# Storer, Wu, and Vaccari easy 50x10 instance (Table 2, instance 19)
+50 10
+ 7  74  1  27  5  66  3  89  6  58  0  11  8  77  9  17  2  70  4  97
+ 5  10  0  11  2  38  3  60  1  50  7  35  6  94  9  52  4   2  8  20
+ 7  17  0  65  6  93  8  62  9  91  5   2  1  51  2   4  3  19  4  10
+ 4  87  3   3  9  81  0  17  6  44  2  82  7  16  5  13  8 100  1  85
+ 9  18  6  33  7  35  0  78  2  68  3  68  8   3  5   2  4  53  1  25
+ 2  36  8  41  6  60  9  43  0  66  5  34  3  24  7  11  1   5  4  55
+ 9  52  4  99  6  62  0  50  1  24  8  73  7  19  3  23  2  15  5   2
+ 4  85  9  21  3  27  7  53  0  86  1  36  6  35  5  99  8  30  2  43
+ 6  43  5  31  9  99  2  12  0   6  7  79  3  81  1  18  8  73  4  55
+ 4  90  6 100  1  15  0  40  7  96  9  25  5  43  8  23  2  31  3   7
+ 5  61  4  88  6  10  3  48  0 100  2  62  1  83  8  20  7  42  9  19
+ 9  35  7  41  6  16  3  58  0  86  2  69  5  58  1  93  4  47  8  77
+ 2  61  0  40  4  99  1  51  7  46  6  39  3  43  9  37  8  88  5   9
+ 4  15  8  38  2  84  5  98  6  17  1  91  7  91  9  23  3  48  0  98
+ 3  26  2  42  8  55  4  24  0  43  1  83  9  27  7  38  6  37  5  58
+ 5  21  8  78  6  97  0  77  9  82  4  26  3  22  1  90  7  57  2  31
+ 4   3  9  44  3  90  1  64  5  52  8  35  7  18  2  45  0   4  6  14
+ 8  60  6  59  3  67  2  85  0  43  7  93  5  44  4  22  1  68  9  38
+ 4  77  8  41  2  74  6  99  0 100  1  45  9  14  3  26  7  98  5  77
+ 8  38  9  57  7  42  5  64  1  80  6  81  4  70  3  13  2  41  0  65
+ 9  36  4  22  8  39  0  76  1  78  2  27  5  55  3  10  6   5  7  71
+ 7  70  9  81  1  60  5  85  3  63  6  97  2  61  8  44  0   5  4  35
+ 9  38  0  94  2  46  5  20  8  87  1  41  4  41  3  40  7  99  6  48
+ 7  30  6   9  5  13  2  79  8  81  0  25  9  93  4  85  3  78  1  76
+ 4   6  8  58  6  51  7  48  2  68  3  34  5  78  9  59  1  98  0  36
+ 4  90  6  56  7  97  9  37  0  38  1  47  2  56  3   8  5  37  8   7
+ 0  66  8  15  1  39  5  89  7   3  9  54  3  24  2  14  6  99  4  73
+ 3  12  9  37  4  79  8  95  0  50  1  74  6   1  5  55  7  98  2  49
+ 8  99  9  79  3  99  2  87  0  80  4  13  5  99  6  13  1  54  7  61
+ 1  51  9  21  3  32  6  20  0  80  7  58  2  91  5  84  8  62  4  91
+ 1  11  8  38  2  14  9  12  3  39  5  34  0  37  6  94  4  10  7   2
+ 6  76  9  86  3  40  4  30  2  97  0  59  8 100  7   9  5  55  1  86
+ 3  33  1  49  0  94  2  17  6  17  8  70  5  17  7  42  4  26  9  24
+ 4  75  1  20  9  93  2  58  3  51  0  94  6  24  7  70  8  51  5  82
+ 8  59  1   9  3  59  5  62  9  79  7  53  6  48  4  98  2  76  0  71
+ 6  90  2  35  5  89  0  59  9  28  7  51  4  69  3  36  1  32  8  27
+ 5  10  6  85  4  97  1   3  0  79  9  86  3  10  7  80  2  37  8  39
+ 7  60  0  27  5  69  8  58  6  67  2  36  9  31  3  69  1  16  4  22
+ 2  27  5  16  6  15  4  40  8  16  1  92  9  60  7  43  3   2  0   7
+ 1  79  7  99  0  27  9  56  5  29  6  17  8  67  4  34  3  86  2  61
+ 6  57  7 100  4  73  9  17  8   3  3  64  2  99  0  71  5  27  1  90
+ 2  80  5  23  4  54  6  39  9  77  3  65  7  59  0   7  1  63  8  32
+ 4  98  6  17  8  44  5   1  3  10  7  56  2  95  9  80  0  99  1  64
+ 8  60  7  74  3  60  6  30  0  81  5  25  4  89  9  19  2  59  1  21
+ 1  67  0  42  8  93  2  47  5  34  7  11  6 100  9  15  4  99  3   2
+ 9  35  3  61  5  93  8  83  7  87  4  66  0  96  2  55  1  41  6  61
+ 8  22  5  25  7  29  3  70  6  93  1  19  0  49  9  62  2  19  4  73
+ 8  11  4  93  5  97  1  28  2  14  0  75  7  41  3  40  9  62  6  66
+ 7  76  6  61  8  64  3  90  0  20  2  43  9  50  1  13  5   4  4  47
+ 3  38  4  11  0  30  5  37  7  57  9  64  1  68  8  42  2  19  6  79
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/swv20.txt b/scalar-variable/job-shop-scheduling/data/jsplib/swv20.txt
new file mode 100644
index 0000000..ffd9f92
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/swv20.txt
@@ -0,0 +1,55 @@
+#+++++++++++++++++++++++++++++
+# instance swv20
+#+++++++++++++++++++++++++++++
+# Storer, Wu, and Vaccari easy 50x10 instance (Table 2, instance 20)
+50 10
+ 8 100  7  30  4  42  9  11  2  31  1  71  5  41  0   1  3  55  6  94
+ 4  81  6  20  3  96  7  39  8  29  0  90  9  61  2  64  1  86  5  47
+ 5  80  0  56  1  88  7  19  2  68  8  95  3  44  4  22  9  60  6  80
+ 4  86  6  70  0  88  2  15  7  50  1  54  9  88  3  25  8  89  5  33
+ 0  48  1  57  4  86  8  60  3  78  5   4  9  60  7  40  2  11  6  25
+ 6  23  7   9  1  90  0  51  2  52  9  14  5  30  4   1  8  25  3  83
+ 1  30  4  75  5  76  9 100  7  54  2  41  6  50  8  75  0   1  3  28
+ 2  46  3  78  1  37  7  12  6  56  4  50  8  66  5  39  0   8  9  72
+ 1  24  6  90  0  32  3   6  2  99  9  22  8  12  4  63  7  81  5  52
+ 6  62  3   9  8  59  0  66  4  41  1  32  5  29  7  79  9  84  2   4
+ 9  57  5  99  6   2  3  17  0  51  7  10  4  14  1  64  2  99  8  27
+ 7  81  0  67  9  83  2  30  5  25  6  87  1  29  3   7  8  93  4   1
+ 5  65  8  53  9  48  4  28  7  74  0  60  6  77  2  22  1   5  3  98
+ 1  97  5  37  0  71  7  49  6  51  3  17  4  38  9  67  8  28  2  31
+ 0  20  8  94  3  39  6  73  9  63  4   8  2  57  1  27  7  26  5  42
+ 8  77  1  68  9  20  7 100  4   1  5  77  6  17  3  35  2  65  0  86
+ 8  68  6  62  4  79  7  84  1  60  3  56  0  10  9  86  5  60  2  30
+ 4  71  2  74  6   6  1  56  3  69  0   8  8  50  9  78  5   4  7  89
+ 8  29  5   5  1  59  3  96  0  46  4  91  2  48  7  53  6  21  9  82
+ 2  19  9  96  0  73  1  39  5  54  8  50  7  60  3  50  4  65  6  78
+ 7  68  4  15  2  26  3  26  0  13  9  13  5  96  8  70  6  27  1  93
+ 6  41  8  18  4  66  7   9  1  31  2  92  0   3  3  78  5  41  9  53
+ 5   9  0  64  2  15  6  73  4  12  1  43  8  89  7  69  3  32  9  22
+ 5  93  6  19  3  74  8  81  0  72  2  94  9  19  1  26  4  53  7   7
+ 3  48  2  29  5  51  8  72  7  35  6  32  1  38  0  98  4  58  9  54
+ 0  94  9  23  4  41  6  53  2  53  7  27  1  62  3  68  8  84  5  49
+ 4   4  1   4  0  66  7  90  9  78  2  29  5   2  6  86  3  23  8  46
+ 3  78  5  61  2  97  7  68  8  92  0  15  4  12  6  77  1  12  9  22
+ 0 100  7  89  6  71  2  70  8  89  4  72  5  78  3  23  9  37  1   2
+ 0  91  3  74  2  36  4  72  6  62  1  80  9  20  7  77  5  47  8  80
+ 1  44  0  67  4  66  8  99  6  59  5   5  7  15  2  38  3  40  9  19
+ 1  69  9  35  3  86  0   7  2  35  5  32  6  66  4  89  8  63  7  52
+ 3   3  4  68  1  66  7  27  6  41  5   2  9  77  0  45  2  40  8  39
+ 4  66  3  42  7  79  0  55  6  98  9  44  5   6  8  73  1  55  2   1
+ 3  80  8  18  9  94  2  27  5  42  4  17  7  74  0  65  6   6  1  27
+ 2  73  4  70  5  51  0  84  8  29  9  95  1  97  7  28  3  68  6  89
+ 9  85  6  56  5  54  3  76  2  50  0  43  1   8  7  93  4  17  8  65
+ 1   1  3  17  2  61  5  38  4  71  7  18  0  40  9  94  6  41  8  74
+ 3  30  8  22  6  39  9  56  5   3  7  64  4  74  2  21  0  93  1   1
+ 0  17  8   8  9  20  5  38  3  85  7   5  2  63  1  18  4  89  6  88
+ 8  87  5  44  0  42  1  34  9  11  7  13  3  71  4  88  6  32  2  12
+ 2  39  1  73  6  43  0  48  9  77  8  48  5  23  7  66  3  94  4  68
+ 1  98  7  19  3  69  6   5  8  85  9  19  0  30  2  43  5  87  4  70
+ 2  45  1  60  4  30  9  71  5  35  0  75  3  75  6  41  8  67  7  37
+ 3  63  7  39  2  16  9  69  1  46  5  20  6  57  4  51  0  66  8  40
+ 2   7  7  73  6  17  1  21  0  24  8   2  5  68  4  22  9  36  3  60
+ 1  20  4  17  8  12  9  29  5  28  0   7  3  38  6  57  7  22  2  75
+ 5  53  4   7  7   5  8  27  9  38  2 100  6  48  0  53  1  11  3  18
+ 1  49  7  47  4  81  8   9  0  20  2  63  3  15  6   1  9  10  5   5
+ 4  49  6  27  7  17  5  64  2  30  8  56  0  42  3  97  9  82  1  34
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/ta01.txt b/scalar-variable/job-shop-scheduling/data/jsplib/ta01.txt
new file mode 100644
index 0000000..7205eb7
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/ta01.txt
@@ -0,0 +1,16 @@
+15 15
+ 6 94 12 66  4 10  7 53  3 26  2 15 10 65 11 82  8 10 14 27  9 93 13 92  5 96  0 70  1 83
+ 4 74  5 31  7 88 14 51 13 57  8 78 11  8  9  7  6 91 10 79  0 18  3 51 12 18  1 99  2 33
+ 1  4  8 82  9 40 12 86  6 50 11 54 13 21  5  6  0 54  2 68  7 82 10 20  4 39  3 35 14 68
+ 5 73  2 23  9 30  6 30 10 53  0 94 13 58  4 93  7 32 14 91 11 30  8 56 12 27  1 92  3  9
+ 7 78  8 23  6 21 10 60  4 36  9 29  2 95 14 99 12 79  5 76  1 93 13 42 11 52  0 42  3 96
+ 5 29  3 61 12 88 13 70 11 16  4 31 14 65  7 83  2 78  1 26 10 50  0 87  9 62  6 14  8 30
+12 18  3 75  7 20  8  4 14 91  6 68  1 19 11 54  4 85  5 73  2 43 10 24  0 37 13 87  9 66
+11 32  5 52  0  9  7 49 12 61 13 35 14 99  1 62  2  6  8 62  4  7  3 80  9  3  6 57 10  7
+10 85 11 30  6 96 14 91  0 13  1 87  2 82  5 83 12 78  4 56  8 85  7  8  9 66 13 88  3 15
+ 6  5 11 59  9 30  2 60  8 41  0 17 13 66  3 89 10 78  7 88  1 69 12 45 14 82  4  6  5 13
+ 4 90  7 27 13  1  0  8  5 91 12 80  6 89  8 49 14 32 10 28  3 90  1 93 11  6  9 35  2 73
+ 2 47 14 43  0 75 12  8  6 51 10  3  7 84  5 34  8 28  9 60 13 69  1 45  3 67 11 58  4 87
+ 5 65  8 62 10 97  2 20  3 31  6 33  9 33  0 77 13 50  4 80  1 48 11 90 12 75  7 96 14 44
+ 8 28 14 21  4 51 13 75  5 17  6 89  9 59  1 56 12 63  7 18 11 17 10 30  3 16  2  7  0 35
+10 57  8 16 12 42  6 34  4 37  1 26 13 68 14 73 11  5  0  8  7 12  3 87  2 83  9 20  5 97
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/ta02.txt b/scalar-variable/job-shop-scheduling/data/jsplib/ta02.txt
new file mode 100644
index 0000000..dae8a1d
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/ta02.txt
@@ -0,0 +1,16 @@
+15 15
+ 9 86 14 60  4 10 13 59 10 65  3 94  7 71  8 25  0 98  5 49  1 43  2  8 12 90  6 21 11 73
+10 68  8 28 11 38 14 36  3 93 13 35  9 37  7 28  4 62  2 86  6 65  1 11  5 20 12 82  0 23
+ 7 33  0 67  6 96  5 91 14 83 13 81  2 60 11 88  4 20 12 62  1 22  9 79  3 38 10 40  8 82
+ 9 13 11 14 14 73  0 88  1 24  8 16  5 78 10 70 12 53  4 68 13 73  3 90  6 58  7  7  2  4
+11 93  4 52 13 63  3 13  8 19  1 41 10 71 12 59  2 19 14 60  6 85  7 99  0 73  9 95  5 19
+ 5 62  2 60  1 93 10 16  0 10  4 72  8 88 14 69  6 58  3 41  9 46  7 63 11 76 12 83 13 62
+ 5 50 10 68 13 90  0 34  9 44  8  5  1  8 11 25 14 70  7 53 12 78  2 92  6 62  4 85  3 70
+12 60  0 64  9 92  3 44 13 63  6 91  5 21  7  1  2 96 14 19 11 59  8 12 10 41  1 11  4 94
+11 93 10 46  5 51 13 37  1 91  9 90  8 63  7 40  3 68  6 13  0 16  2 83 14 49 12 24  4 23
+ 2  5 14 35  3 21 10 14  6 66  1  3  0  6 13 98 11 63  4 64  5 76  8 94  7 17 12 62  9 37
+11 35 14 42 13 62  5 68  4 73  9 27  1 52  6 39 12 41  0 25  2  9  8 34 10 50  3 41  7 98
+12 23  3 32 10 35  8 10  4 29  7 68 13 20 11  8 14 58  1 62  2 39  0 32  5  8  6 33  9 91
+ 8 28 13 31  5  3  0 28 11 66  9 59  4 24 12 45  1 81 10  8  6 44  2 42  7  2 14 23  3 53
+ 2 11  5 93  4 27  3 59  9 62  1 23 11 23 13  7  7 77  6 64 10 60 14 97  0 36  8 53 12 72
+ 1 36 10 98  4 38  2 24  0 84  7 47  6 72  9  1 11 91 12 85  5 68 14 42  3 20 13 30  8 30
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/ta03.txt b/scalar-variable/job-shop-scheduling/data/jsplib/ta03.txt
new file mode 100644
index 0000000..7c3af9f
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/ta03.txt
@@ -0,0 +1,16 @@
+15 15
+ 7 69 11 81  8 81  3 62 12 80  1  3 13 38  0 62 14 54  6 66  9 88  4 82  2  3 10 12  5 88
+12 83  1 51 11 47  9 15  6 89  3 76  2 52  4 18  5 22  8 85 13 26 14 30 10  5  0 89  7 22
+ 1 62  2 47  9 93  0 54  3 38  5 78  8 71  4 96 14 19 10 33 12 44 13 71  7 90  6  9 11 21
+13 33 10 82  6 80  2 30 14 96  7 31  4 11 11 26  0 41  5 55  9 12  3 10  8 92  1  3 12 75
+ 1 36  8 49  4 10 14 43  6 69  5 72  3 19  2 65  9 37 10 57 13 32  7 11 11 73  0 89 12 12
+ 5 83 14 32  2  6 12 13 10 87  1 94 11 36  4 76  6 46  9 30  0 56 13 62  8 32  3 52  7 72
+ 5 29  2 78  0 21  1 27  8 17 14 43 11 14 10 15  7 16  9 49  6 72 12 19  4 99 13 38  3 64
+ 4 12  7 74 10  4  1  3  9 15  8 62  2 50 14 38 11 49  3 25  5 18  6 55 13  5 12 71  0 27
+14 69 11 13  0 33  9 47 10 86  5 31  3 97 12 48  8 25 13 40  6 94  1 22  7 61  2 59  4 16
+ 9 27  0  4  3 35 10 80 12 49 13 46  5 84  1 46  6 96 14 72  8 18 11 23  2 96  7 74  4 23
+ 7 36  2 17  1 81 12 67  3 47 14  5  4 51  6 23  5 82  9 35  8 96 13  7 10 54  0 92 11 38
+ 0 78  8 58 14 62 12 43  9  1  5 56  6 76 10 49  7 80 11 26  3 79  4  9  1 24 13 24  2 42
+ 8 38 12 86 10 38 11 38 14 83  3 36  6 11  1 17  4 99  5 14  0 57  9 64 13 58  2 96  7 17
+13 10  2 86 11 93  0 63 14 61 10 62  3 75  1 90 12 40  4 77  5  8  6 27  7 96  9 69  8 64
+ 1 73 13 12  0 14 11 71  2  3 10 47  4 84  8 84  3 53  5 58  7 95  6 87  9 90 12 68 14 75
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/ta04.txt b/scalar-variable/job-shop-scheduling/data/jsplib/ta04.txt
new file mode 100644
index 0000000..36d102d
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/ta04.txt
@@ -0,0 +1,16 @@
+15 15
+ 3 72  7 51  6 42 14 31  9 61  8 46  5 88  4 33 10 27  1 85  0 70 12 56 11 70  2 50 13 25
+ 1 19 11 79  0 79  5 47  8 40 13 67  3 43 10 65  9 84  2 61 12 30  6 56  4 19  7 91 14 68
+ 7 94  3  7  8  2 11 95  0 60  4 82  9 76 13 36  1  8 10 85  6  7  5 44 14  2 12 72  2 91
+ 6 58 11 67  5 84 13 34  3 19  2 19  1 94  4 41  9 98 12 96  8 25  0 40 14 74  7 88 10 74
+ 1 45 11 60  6  8  5 29  8 32  7 42 12 25  9  4  2 71 14 79 13 93  3 28  0 30  4 17 10 43
+11 84  2 56 12 46  1 93 14 66  0 84  6 40  9  4  3 15 13 15  7 54 10 39  4 77  5 55  8 31
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+ 7 48  4 28 14 70 10 26  3 68  0  4 13 19  8 92  1 24  2 54  6 57 12 47 11 84  9 85  5 95
+ 2 36 12 34 10 65  3 64  6 30  5 41 14 53  9 74 13 44  4 13  0 41 11  6  7 32  8 94  1 37
+11 62  9  9  3 89  7 37  6 28  4 23  0 13  2 60  5 46  1 94 10 85  8 72 13 18 12 79 14 11
+ 0 74  4 61  1 43  9 26  2 97 11 62 13 40 10 60  7 62  6 78  8 42 12  8 14 21  3 11  5 70
+ 6  9  0 22  4  9 10  8  2 54 14 32  9 92 13 76 11  2 12 63  1 63  8 98  5 42  3 12  7 41
+ 5 67 10  7 13 91  2 52  7 87  4  4  8  1  6 56  9 82  0 47 12 35 11  8  1 92 14 39  3 11
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diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/ta05.txt b/scalar-variable/job-shop-scheduling/data/jsplib/ta05.txt
new file mode 100644
index 0000000..d65e709
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/ta05.txt
@@ -0,0 +1,16 @@
+15 15
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+ 5  2  1 88 14 99 10 52 13 68  9 13  6 38 12 35  8 57  2 37  7 93  0 38  3 68  4 94 11 71
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+ 6 68 12 71 14  3  1 68  7 91  5 37 11 73  0 21  2 85  3 79  8 51 13 50  4 21  9 30 10 64
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+ 1 37  2  9  6 49  7 23 10  1 12 78 14 39  8 15  0  9  3 41 13 35  5 83  4  8  9 61 11 60
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+ 4 22  3 49  8 33 14  2  2 24 13  3  5 73  6 68 10 21 12 61  7 69 11 94  1 43  9 39  0 48
+ 6 81 12 46  7 21  5 23  2 86  4 19 13 64 11 52  8 22  0 50 10 11  3 73  1 77  9 16 14 75
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+ 7 94  5 18  0 54 10 42  2 70  3 29  9 43  6 50 11 75  8 70  1 40  4 48 14  1 12 27 13 12
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/ta06.txt b/scalar-variable/job-shop-scheduling/data/jsplib/ta06.txt
new file mode 100644
index 0000000..9b71ec0
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/ta06.txt
@@ -0,0 +1,16 @@
+15 15
+ 7 96 12 23  5 71  8 26  3 28 14 16 13 27  9 71  0 18  1 57  4 43  2  5  6 12 11 91 10 63
+ 8 32  0 81  5 95 13 79  6 55  1 45  4 60  2 73  3 23 11 44 10 92 12 20  9  5 14 72  7 73
+ 6 63  8 93  7 63  1 79  9 10  5 66 12 27  4 93  0 24  2 26 14  8 11 69  3 29 13 66 10 97
+12 80  0 87 14 68  7 23 13 54  1 16  6 68  8 32 11 74  2  3  3  2  9 71  5  4 10 67  4 28
+ 8 46  2 96 12 11 11 41 10 93  9  2  4 98  3 10 14 43  5 65  0 27  7 57  6 75 13 87  1 81
+13  5  8 91  6 92 11 87 14 66  9 36 12 67  7 88  0 92  1 27 10 13  2  7  5 95  3 66  4 13
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+ 4 79 10 24 14 41  3 83  6 45 13 29 11  3  9 42  0  5  5 44  1 83 12 59  8 60  7 78  2 44
+ 7 19  1 55  5 20  4 74 14 66  8 37  0 55  9 63 12 40  3 73 10 55  2 84 13 54 11 62  6  6
+ 3 27  6 59 13  6  4 90  5  6 10 37  2 64  8 35 12 25 11 59  9 77  7 30 14  1  1  7  0 70
+ 1  4  4 53  7  6  2 10 14 51 10 89 12 38 13 38  6 35  5 44  9 99  0 88  3 52  8 16 11 99
+ 0 28  7 11 14 76 13 51  8 35  3 60  6 44  9 39  5 66 12 49 10 40  4 34  1 80  2 38 11 29
+14 31 10 32  0 40  8 25 12 40 13 85  4 39 11 61  1 15  3 41  6 93  5 64  2 16  9 81  7 97
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+14 80  2 30  6 67  4 58  3 45 11 29  1 48  5 28  7 64  0 63  8 80 10 23  9 93 12 55 13 48
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/ta07.txt b/scalar-variable/job-shop-scheduling/data/jsplib/ta07.txt
new file mode 100644
index 0000000..d0b8060
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/ta07.txt
@@ -0,0 +1,16 @@
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+ 4 20  2 99  1 13  0 88 14 25 10 75  9 90  6 84 11 70 12 41  3 17  8 54  7 63 13  1  5 95
+ 8 59  3 22 13 46 14 10  2  1 11 21  5  3  4 84  9 93 12 59 10 78  7 73  1 59  0 42  6 63
+ 7 72  1 80 10 12  4 56  0 22  8  8 12 93  6 27 13 17  2 38  3 26  9 51 11 43 14 80  5 94
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diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/ta08.txt b/scalar-variable/job-shop-scheduling/data/jsplib/ta08.txt
new file mode 100644
index 0000000..39bb138
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/ta08.txt
@@ -0,0 +1,16 @@
+15 15
+ 3 83  6  1  7 96 13 54  4 30  1 80 12 81 10  9  8 49 14 32  0 19  9 92  5 65  2 88 11 64
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diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/ta09.txt b/scalar-variable/job-shop-scheduling/data/jsplib/ta09.txt
new file mode 100644
index 0000000..7366823
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/ta09.txt
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diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/ta10.txt b/scalar-variable/job-shop-scheduling/data/jsplib/ta10.txt
new file mode 100644
index 0000000..b8bba81
--- /dev/null
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new file mode 100644
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--- /dev/null
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new file mode 100644
index 0000000..47b2d0d
--- /dev/null
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new file mode 100644
index 0000000..5842095
--- /dev/null
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diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/ta14.txt b/scalar-variable/job-shop-scheduling/data/jsplib/ta14.txt
new file mode 100644
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new file mode 100644
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--- /dev/null
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new file mode 100644
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diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/ta17.txt b/scalar-variable/job-shop-scheduling/data/jsplib/ta17.txt
new file mode 100644
index 0000000..c70124f
--- /dev/null
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diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/ta18.txt b/scalar-variable/job-shop-scheduling/data/jsplib/ta18.txt
new file mode 100644
index 0000000..683f200
--- /dev/null
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new file mode 100644
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new file mode 100644
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new file mode 100644
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diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/ta52.txt b/scalar-variable/job-shop-scheduling/data/jsplib/ta52.txt
new file mode 100644
index 0000000..8c937f5
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diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/ta53.txt b/scalar-variable/job-shop-scheduling/data/jsplib/ta53.txt
new file mode 100644
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--- /dev/null
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diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/ta54.txt b/scalar-variable/job-shop-scheduling/data/jsplib/ta54.txt
new file mode 100644
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diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/ta55.txt b/scalar-variable/job-shop-scheduling/data/jsplib/ta55.txt
new file mode 100644
index 0000000..156ee06
--- /dev/null
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diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/ta56.txt b/scalar-variable/job-shop-scheduling/data/jsplib/ta56.txt
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diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/ta57.txt b/scalar-variable/job-shop-scheduling/data/jsplib/ta57.txt
new file mode 100644
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diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/ta58.txt b/scalar-variable/job-shop-scheduling/data/jsplib/ta58.txt
new file mode 100644
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diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/ta59.txt b/scalar-variable/job-shop-scheduling/data/jsplib/ta59.txt
new file mode 100644
index 0000000..6a50827
--- /dev/null
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diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/ta60.txt b/scalar-variable/job-shop-scheduling/data/jsplib/ta60.txt
new file mode 100644
index 0000000..7237c2d
--- /dev/null
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diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/ta61.txt b/scalar-variable/job-shop-scheduling/data/jsplib/ta61.txt
new file mode 100644
index 0000000..415d48c
--- /dev/null
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diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/ta63.txt b/scalar-variable/job-shop-scheduling/data/jsplib/ta63.txt
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diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/ta71.txt b/scalar-variable/job-shop-scheduling/data/jsplib/ta71.txt
new file mode 100644
index 0000000..78663e0
--- /dev/null
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diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/ta72.txt b/scalar-variable/job-shop-scheduling/data/jsplib/ta72.txt
new file mode 100644
index 0000000..ee7a8d5
--- /dev/null
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diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/ta73.txt b/scalar-variable/job-shop-scheduling/data/jsplib/ta73.txt
new file mode 100644
index 0000000..4a13ed1
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/ta73.txt
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diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/ta74.txt b/scalar-variable/job-shop-scheduling/data/jsplib/ta74.txt
new file mode 100644
index 0000000..c5e54a8
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/ta74.txt
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diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/ta75.txt b/scalar-variable/job-shop-scheduling/data/jsplib/ta75.txt
new file mode 100644
index 0000000..3705468
--- /dev/null
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diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/ta76.txt b/scalar-variable/job-shop-scheduling/data/jsplib/ta76.txt
new file mode 100644
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diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/ta77.txt b/scalar-variable/job-shop-scheduling/data/jsplib/ta77.txt
new file mode 100644
index 0000000..e936e33
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/ta77.txt
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diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/ta78.txt b/scalar-variable/job-shop-scheduling/data/jsplib/ta78.txt
new file mode 100644
index 0000000..d581239
--- /dev/null
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diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/ta79.txt b/scalar-variable/job-shop-scheduling/data/jsplib/ta79.txt
new file mode 100644
index 0000000..11abcab
--- /dev/null
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diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/ta80.txt b/scalar-variable/job-shop-scheduling/data/jsplib/ta80.txt
new file mode 100644
index 0000000..a8fe119
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/ta80.txt
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+ 8 89 15 32  1 77  6 66  2 88 19  6 16 37 17 35  0 49 10 50 12 89  5 62  9 28 13 31  4 61 14 41  3 71 11  2 18 22  7  9
+ 7 32  8 20  3 77 17 70 14 23  5 82  1 51 11 75  9 34 15 55  4 91 12 49 16 46  6 80 10  6  2 69 13 70 19 99 18 85  0 45
+18 32 15 27  8 43 16 53 13 70  6 17 11 57  4 77 10 91  2 49  3  6  1  6 19 47  7 93 12  4  9 54  0 93 14 68 17 48  5 93
+11 16  3  5 10 39 17 79 19 51 16 39  5 39  6 32 13 38  9 28  8 96 14 35 12 56 18 42  1 45 15 83  2 42  4 40  7 25  0  3
+11 77  8  1  5 11 13 87 18 21 16 44  1 92  3 77  7  9  6 92  9 10 14 31 10 62  2 65  4 44 19 78 15 22 17 13  0 26 12 72
+17 11 19 46  8  8  0 77  4 31  1 48 11 37  3 99 13 27 16 99  9 31 10 73  5 60 14 40  2 81 18  9 12 20  7 81 15 71  6  2
+ 6 60  5 20  1 62 18 18  7 18  0 33 19 38 16 48  2 37 12 78 14 76 17 28  3 65 10 61  8 40  4 28 15 67 13  4  9 17 11 26
+ 2 54 17 89  7 69 12 93  0 69 14 93  4 54 19 30 15 14 10 14  8 71  1 49  6 10  3 86 18 88  5 67  9 17 11  2 16  2 13 20
+16 54 12 83  0 59  2 70 14 18  5 34  6  7  3  2 17 45 15  6 18 80 10 21 11 72  7 80  9 89  1 52  8 33 19 41  4 76 13  5
+ 9 53  3 15 11 75 18 10 15 48  1 54 19  1 16 43 13 22 17 31  0 63  5  1 14 68 10 74 12 23  4 32  2 53  8 71  6 93  7 22
+16 21 14 51  2 56 11 39  5 32 13 17 17 37 19 21  8 42 15 81  9 56 10 29  1 11 12 78  7 40  4 66  6 57  3 92 18  5  0 38
+ 7 30  9 31 16 92  2 26 14 56  3 67  5 88  6 11 18 25 19 24 13 98  8  8 15 34 17 18  0 80 12 82 11 28 10 87  4 77  1 14
+ 5 40 18 43 13 85 10 84  8 76 14 64  9  7 12 51  4 51  2 15  7 96 11 31 19 85  6 30  1 85 17 45  0 73 15 73  3 17 16 57
+ 6  3 11 32  8 92  0 97  1 78  2 83 15 37  7 41 12  4 14 62 18 16  5 36 16  4 10 26 19 28 17  2  4 16  3 37  9 93 13 26
+ 7 64 10 90 16 88  9 32  5 13 15 70 12  5  6 30  3 44  2 82  0 98 19 44 18 67  8 24 11 49  4 99 17  9  1 28 13 96 14 70
+15 83 18 29 19 27  0 78 10 85 12 10 14 77  9 91  1 24  3 97 17 19  2 54  8 40  6 39 13 46 16 89  7 83  5 93 11 53  4 90
+13 76 19 56  7 40  4 73  6 14 18 74 12 75  1 55 17 90 16  8  2  9 14 59  3 60  5 27 15  1  0 17 11  6  9 41 10 41  8 10
+ 0 23  3 77  8  7 12 66  9  5 16 85  2 87  6  1 19 40 14 69  5 62 17 90 11 20 15 18  4 32  1 36 18  4  7  6 10 47 13 28
+11 45  9 87 19  4  3 17  1  6  7 13  2 72  4 66 18 68  6 87 15  1 17 79 16 44 14  5 10 33  0 32 12 20  8 63 13 73  5 62
+10 81  5  3  9 13  8 42  3 22  1 32  0 83  4 56  7 28 15 96 11 34 19 42 18 22 13 86 14 45 17 79  2  7 12 43 16 27  6 41
+ 6  4 10 55  4 31 19 22  2 28 13 44 12 15 11 88  8 27  9 66 17 50  0 25  1 27  7 91 14 53 15 71  3 10 16 12  5  2 18 61
+11 70  9 69  8 26 16 78 13 42  7 97 19 68  5 88 10 37  3 23 18 46  2 55 14 29 17 81 12 54  4 70  0 71  6  2  1 53 15 28
+11 39 12 56  9 87  7 21 15  9 18 82 16 44  8 63 19  9  4 50  1 34 17 58 13 18  5 87  0 42 14 78  2 98  6 30 10 46  3 21
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/yn1.txt b/scalar-variable/job-shop-scheduling/data/jsplib/yn1.txt
new file mode 100644
index 0000000..07fd836
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/yn1.txt
@@ -0,0 +1,25 @@
+#+++++++++++++++++++++++++++++
+# instance yn1
+#+++++++++++++++++++++++++++++
+# Yamada and Nakano 20x20 instance (Table 4, instance 1)
+20 20
+17 13  2 26 11 35  4 45 12 29 13 21  7 40  0 45  3 16 15 10 18 49 10 43 14 25  8 25  1 40  6 16 19 43  5 48  9 36 16 11
+ 8 21  6 22 14 15  5 28 10 10  2 46 11 19 19 13 13 18 18 14  3 11  4 21 16 30  1 29  0 16 15 41 17 40 12 38  7 28  9 39
+ 4 39  3 28  8 32 17 46  0 35 14 14  1 44 10 20 13 12  6 23 18 22  9 15 11 35  7 27 16 26  5 27 15 23  2 27 12 31 19 31
+ 4 31 10 24  3 34  6 44 18 43 12 32  2 35 15 34 19 21  7 46 13 15  5 10  9 24 14 37 17 38  1 41  8 34  0 32 16 11 11 36
+19 45  1 23  5 34  9 23  7 41 16 10 11 40 12 46 14 27  8 13  4 20  2 40 15 28 13 44 17 34 18 21 10 27  0 12  6 37  3 30
+13 48  2 34  3 22  7 14 12 22 14 10  8 45 19 38  6 32 16 38 11 16  4 20  0 12  5 40  9 33 17 35  1 32 10 15 15 31 18 49
+ 9 19  5 33 18 32 16 37 12 28  3 16  2 40 10 37  4 10 11 20  1 17 17 48  6 44 13 29 14 44 15 48  8 21  0 31  7 36 19 43
+ 9 20  6 43  1 13  5 22  2 33  7 28 16 39 12 16 13 34 17 20 10 47 18 43 19 44  8 29 15 22  4 14 11 28 14 44  0 33  3 28
+ 7 14 12 40  8 19  0 49 13 11 10 13  9 47 18 22  2 27 17 26  3 47  5 37  6 19 15 43 14 41  1 34 11 21  4 30 19 32 16 45
+16 32  7 22 15 30  6 18 18 41 19 34  9 22 11 11 17 29 10 37  4 30  2 25  1 27  0 31 14 16 13 20  3 26 12 14  5 24  8 43
+18 22 17 22 12 30 15 31 13 15  4 13 16 47 19 18  6 33  3 30  7 46  2 48 11 42  0 18  1 16  8 25 10 43  5 21  9 27 14 14
+ 5 48  1 39  2 21 18 18 13 20  0 28 15 20  8 36  6 24  9 35  7 22 19 36  3 39 14 34  4 49 17 36 11 38 10 46 12 44 16 13
+14 26  1 32  2 11 15 10  9 41 13 10  6 26 19 26 12 13 11 35  5 22  0 11  7 24 17 33  8 11 10 34 16 11  3 22  4 12 18 17
+16 39 10 24 17 43 14 28  3 49 15 34 18 46 13 29  6 31 11 40  7 24  1 47  9 15  2 26  8 40 12 46  5 18 19 16  4 14  0 21
+11 41 19 26 16 14  3 47  0 49  5 16 17 31  9 43 15 20 10 25 14 10 13 49  8 32  6 36  7 19  4 23  2 20 18 15 12 34  1 33
+11 37  5 48 10 31  7 42  2 24  1 13  9 30 15 24  0 19 13 34 19 35  8 42  3 10 14 40  4 39  6 42 12 38 16 12 18 27 17 40
+14 19  1 27  8 39 12 41  5 45 11 40 10 46  6 48  7 37  3 30 17 31  4 16 18 29 15 44  0 41 16 35 13 47  9 21  2 10 19 48
+18 38  0 27 13 32  9 30  7 17 14 21  1 14  4 37 17 15 16 31  5 27 10 25 15 41 11 48  3 48  6 36  2 30 12 45  8 26 19 17
+ 1 17 10 40  9 16  5 36  4 34 16 47 19 14  0 24 18 10  6 14 13 14  3 30 12 23  2 37 17 11 11 23  8 40 15 15 14 10  7 46
+14 37 10 28 13 13  0 28  2 18  1 43 16 46  8 39  3 30 12 15 11 38 17 38 18 45 19 44  9 16 15 29  5 33  6 20  7 35  4 34
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/yn2.txt b/scalar-variable/job-shop-scheduling/data/jsplib/yn2.txt
new file mode 100644
index 0000000..b199ff6
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/yn2.txt
@@ -0,0 +1,25 @@
+#+++++++++++++++++++++++++++++
+# instance yn2
+#+++++++++++++++++++++++++++++
+# Yamada and Nakano 20x20 instance (Table 4, instance 2)
+20 20
+17 15  2 28 11 10  4 46 12 19 13 13  7 18  0 14  3 11 15 21 18 30 10 29 14 16  8 41  1 40  6 38 19 28  5 39  9 39 16 28
+ 8 32  6 46 14 35  5 14 10 44  2 20 11 12 19 23 13 22 18 15  3 35  4 27 16 26  1 27  0 23 15 27 17 31 12 31  7 31  9 24
+ 4 34  3 44  8 43 17 32  0 35 14 34  1 21 10 46 13 15  6 10 18 24  9 37 11 38  7 41 16 34  5 32 15 11  2 36 12 45 19 23
+ 4 34 10 23  3 41  6 10 18 40 12 46  2 27 15 13 19 20  7 40 13 28  5 44  9 34 14 21 17 27  1 12  8 37  0 30 16 48 11 34
+19 22  1 14  5 22  9 10  7 45 16 38 11 32 12 38 14 16  8 20  4 12  2 40 15 33 13 35 17 32 18 15 10 31  0 49  6 19  3 33
+13 32  2 37  3 28  7 16 12 40 14 37  8 10 19 20  6 17 16 48 11 44  4 29  0 44  5 48  9 21 17 31  1 36 10 43 15 20 18 43
+ 9 13  5 22 18 33 16 28 12 39  3 16  2 34 10 20  4 47 11 43  1 44 17 29  6 22 13 14 14 28 15 44  8 33  0 28  7 14 19 40
+ 9 19  6 49  1 11  5 13  2 47  7 22 16 27 12 26 13 47 17 37 10 19 18 43 19 41  8 34 15 21  4 30 11 32 14 45  0 32  3 22
+ 7 30 12 18  8 41  0 34 13 22 10 11  9 29 18 37  2 30 17 25  3 27  5 31  6 16 15 20 14 26  1 14 11 24  4 43 19 22 16 22
+16 30  7 31 15 15  6 13 18 47 19 18  9 33 11 30 17 46  4 48 10 42  2 18  1 16  0 25 14 43 13 21  3 27 12 14  5 48  8 39
+18 21 17 18 12 20 15 28 13 20  4 36 16 24 19 35  7 22  3 36  6 39 10 34 11 49  0 36  1 38  8 46  9 44  5 13  2 26 14 32
+ 9 11  1 10  2 41 11 10 13 26  0 26 12 13 10 35  6 22  5 11  7 24 19 33  3 11 14 34 17 11  4 22 18 12  8 17 15 39 16 24
+ 1 43 15 28  2 49 14 34  4 46 12 29 18 31 19 40 13 24 11 47  5 15  0 26  7 40 17 46  8 18 10 16 16 14  3 21  9 41  6 26
+16 14  6 47 17 49 10 16  3 31 12 43  4 20  8 25 14 10 18 49  7 32  0 36  9 19  2 23 15 20  5 15 13 34 19 33 11 37  1 48
+ 4 31 11 42  7 24  6 13  0 30 14 24 17 19 19 34 16 35 10 42 15 10 13 40  2 39  8 42  5 38  9 12  1 27 18 40 12 19  3 27
+ 6 39  5 41 13 45 15 40  2 46  9 48  7 37  0 30  1 31 12 16 19 29 14 44  3 41  8 35 10 47 11 21  4 10 16 48 18 38 17 27
+16 32  1 30  8 17 18 21  0 14 17 37 10 15 12 31  7 27  3 25  5 41  4 48 13 48  6 36  2 30 15 45 11 26  9 17 14 17 19 40
+18 16 17 36  4 34  2 47 10 14 15 24  1 10  3 14  7 14 12 30  5 23  9 37  8 11 14 23 11 40  6 15 16 10  0 46 13 37 19 28
+17 13 13 28 11 18 16 43  7 46  8 39  3 30  5 15  4 38  2 38 14 45  0 44 10 16  6 29 12 33  1 20 19 35 15 34  9 16 18 40
+17 14  2 30  0 27 15 47 18 43  3 17 14 13  6 43  7 45 12 32 13 13 16 48  1 10  4 14 10 42  9 38  5 43 19 22 11 43  8 23
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/yn3.txt b/scalar-variable/job-shop-scheduling/data/jsplib/yn3.txt
new file mode 100644
index 0000000..a91a16d
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/yn3.txt
@@ -0,0 +1,25 @@
+#+++++++++++++++++++++++++++++
+# instance yn3
+#+++++++++++++++++++++++++++++
+# Yamada and Nakano 20x20 instance (Table 4, instance 3)
+20 20
+13 47 16 21 17 27  8 46  1 27 14 39 19 24  4 34  7 27  3 36  6 11  5 32  0 13  9 40  2 40 15 20 18 45 10 23 12 36 11 31
+ 1 40 11 20 12 27  6 32 16 26 13 36 10 37  7 26  3 22  4 44 18 18  2 11 17 15  9 27 15 39  5 25  8 16 14 13  0 49 19 25
+ 9 40  8 11 14 47  2 35 13 41  7 37  1 37 18 28  6 42  3 23 10 41  5 33 17 25  0 19 19 15 16 42 12 37 11 34  4 10 15 41
+ 2 28  4 18 11 42  5 26 13 27  6 24 12 41  0 25  1 27  7 40 17 40 14 49 10 33  3 30 15 34 16 17  8 49  9 21 18 35 19 42
+ 7 26  9 27  4 25  3 42 19 28 15 22 17 34  0 15  6 46  1 34 12 47  2 16 16 34 10 31 14 24  5 43 13 45 11 47  8 18 18 15
+ 4 30  8 48  1 46 15 13  9 20  7 31 14 20  2 20 16 34 19 38 18 12 17 11 11 47  5 19  0 35 13 17 10 23 12 11  3 22  6 11
+ 3 27  2 11  5 17  0 43  1 25 15 24 18 36  8 12  9 21 13 44 10 17 17 41 16 34 11 14 12 45  7 45 14 27  6 47  4 47 19 11
+ 5 27  4 41 17 44 16 16 11 42 10 29  3 23  2 15  0 22 13 28  7 16 14 39  9 21 12 15 18 32 15 36  1 29  8 18  6 39 19 33
+ 4 44 19 38 11 24 17 21 13 34 15 11 10 16  8 43 16 41  7 45  3 37  9 10  6 36 18 31  2 17 14 28 12 43  0 22  1 25  5 15
+ 7 40 15 23  4 37  2 12  8 28 12 19 10 30 17 40 13 20 18 11  5 23 16 46  3 40  1 37 14 17  0 16 11 31  6 15  9 10 19 22
+ 5 10  1 37 15 22  2 28  6 10  9 21 19 38 16 35  7 34  0 13 14 33 11 16  4 26  3 20 17 10 18 37 13 21  8 31 10 27 12 23
+16 32  6 32  7 20  1 14  0 11 19 27  3 21 18 32 10 33 13 13 17 36  8 25  4 32  5 41 15 44  2 32 14 12  9 32 12 10 11 28
+ 7 28  9 33 11 35 17 44  4 43 16 35 12 31  2 14  6 48  8 40 15 28  0 31  3 22  5 30 13 27 10 24 18 47 14 38  1 46 19 22
+12 33  6 33 14 38  9 15 10 16 13 24  1 30  8 18  7 46  2 30 17 37 11 24  5 13  3 14 18 11 16 38  0 31  4 24 19 42 15 30
+10 15 16 12  6 43 18 27  0 24  9 20  3 41  2 22 12 41 11 30  5 26  4 24  7 45 13 46 14 22 15 11  8 20  1 42 19 11 17 49
+ 4 14 19 30 17 15  7 17  8 34  2 48  3 45 14 16 12 23 16 29 13 28  6 28 18 24 10 21  5 37  1 38 11 31  0 29  9 42 15 22
+15 41 17 19  5 37  7 36  8 47 12 49 11 29  6 18  9 33 10 30  0 49 16 37  3 11  2 46 14 36 18 35 13 45  1 31  4 33 19 18
+ 9 42  4 11 15 28 18 48  6 22  8 15  1 37 11 36  3 26 19 21  2 48 16 17 12 30 10 27 13 35 17 20  0 18  7 14 14 20  5 41
+19 35 17 19 16 20 15 36  1 15  3 46  4 13  8 42 18 19  5 37  2 10 13 44 10 30 11 20 14 42  6 35  0 26  9 29  7 21 12 42
+17 33  3 11  7 42 16 45  9 29  0 27  5 15 13 37  2 32 11 25 14 21  8 49 19 34  1 31 15 35  6 32  4 20 18 30 10 24 12 29
diff --git a/scalar-variable/job-shop-scheduling/data/jsplib/yn4.txt b/scalar-variable/job-shop-scheduling/data/jsplib/yn4.txt
new file mode 100644
index 0000000..ef60bb4
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/data/jsplib/yn4.txt
@@ -0,0 +1,25 @@
+#+++++++++++++++++++++++++++++
+# instance yn4
+#+++++++++++++++++++++++++++++
+# Yamada and Nakano 20x20 instance (Table 4, instance 4)
+20 20
+16 34 17 38  0 21  6 15 15 42  8 17  7 41 18 10 10 26 11 24  1 31 19 25 14 31 13 33  4 35  9 30  3 16 12 16  5 30  2 13
+ 5 41 11 33  6 15 16 38  0 40 14 38  3 37  1 20 13 22  4 34  7 16 17 39  9 15  2 19 10 36 12 39 18 26  8 19 15 39 19 34
+17 34  1 12 16 10  7 47 13 28 15 27  0 19  6 34 19 33 12 40  9 37 14 24  8 15 10 34  2 44  3 37 18 22 11 31  4 39  5 26
+ 5 48  7 46 16 47 10 45 14 15  8 25  0 34  3 24 12 35 18 15  2 48 13 19 11 10  1 48 17 16 15 28  4 18  6 17  9 44 19 41
+12 47  3 23  9 48 16 45 14 39  6 42  8 32 15 11 13 16  5 14 11 19  1 46 19 10 10 17  7 41  2 47 17 32  4 17  0 21 18 17
+18 14 16 20  1 18 12 14 13 10  6 16  5 24  4 18  0 24 11 18 15 42 19 13  3 23 14 40  9 48  8 12  2 24 10 23  7 45 17 30
+ 0 27 12 15  4 26 13 19 17 14  5 49  7 16 18 28 16 16  8 20  9 36  2 21 14 30  3 36  1 17 15 22  6 43 11 32 10 23 19 17
+ 0 32 16 15 17 12  7 46  3 37 18 43 11 40 13 43  9 48  4 36 15 24  8 25  1 33 14 32  5 26  6 37 12 24 10 24  2 15 19 22
+10 34  6 33 15 25  8 46  0 20 18 33  4 19 13 45  2 47  1 32  3 12 11 29 16 29  5 46 12 17  7 48 14 39 17 40 19 41  9 37
+13 26  3 47  5 44  6 49  1 22 17 12 10 28 19 36  9 27  4 25 14 48  7 11 16 49 12 24 11 48  2 19  0 47 18 49  8 46 15 36
+13 23 18 48 14 15  0 42  3 36  8 15  6 32 10 18  1 45 15 23 11 45  2 13 17 21 12 32  7 44  5 25 19 34 16 22  9 11  4 43
+17 37  7 49 15 45  2 28  9 15  8 35 12 29 13 44  1 26  4 25  5 30  3 39  0 15 14 28 18 23  6 42 11 33 16 45 10 10 19 20
+ 0 10  6 37  3 15 13 13 10 11  2 49  1 28 14 28 15 13  8 29 12 21 16 32 11 21  4 48  5 11 17 26  9 33 18 22  7 21 19 49
+18 38  0 41  4 30 13 43  6 11  2 43 14 27  3 26  9 30 15 19 16 36  1 31 17 47  5 41 10 34  8 40 12 32  7 13 11 18 19 27
+ 6 24  5 30  7 10 10 35  8 28 16 43 19 12  9 44 15 15  3 15  2 35 18 43  0 38  4 16  1 29 17 40 14 49 13 38 12 16 11 30
+ 3 48  6 35 13 43  2 37 17 18  5 27  9 27  7 41  1 22 15 28 16 18 10 37 18 48  4 10  8 14 11 18 14 43  0 48 12 12 19 49
+ 0 13 13 38  7 34  6 42  1 36  5 45 18 24  8 35 14 26 19 30 12 47 16 24 11 47  4 40 10 43  3 16 15 10  2 12  9 39 17 22
+16 30 13 47 19 49  8 20  4 40  3 46 17 21 14 33  6 44  7 23  9 24  0 48 10 43 15 41  2 32  5 29 11 36  1 38 12 47 18 12
+13 10  5 36 12 18 16 48  0 27 14 43 10 46  6 27  7 46 19 35 11 31  2 18  8 24  3 23 17 29 18 14  9 19  1 40 15 38  4 13
+ 9 45 16 44  0 43 17 31 14 35 13 17 12 42  3 14 18 37 10 39  6 48  7 38 15 26  4 49  2 28 11 35  1 42  5 24  8 44 19 38

From 1648269664c605af9c57f37fa8b3e1c9c14eff2f Mon Sep 17 00:00:00 2001
From: Vittorio Distefano <info@vdistefano.studio>
Date: Sat, 23 May 2026 15:39:51 +0200
Subject: [PATCH 17/29] feat(job-shop): expose JSPLIB bound metadata

Add lower_bound_makespan and upper_bound_makespan as job-shop native result columns alongside the existing known-best field.

Populate the fields from the JSPLIB manifest and carry them through both the raw global CSV writer and the normalized result schema so downstream comparisons retain the benchmark bounds.
---
 .../src/job_shop_bench/spec.py                | 63 ++++++++++++++++---
 scripts/normalize_results.py                  |  2 +
 src/solverforge_bench/csv.py                  |  2 +
 3 files changed, 59 insertions(+), 8 deletions(-)

diff --git a/scalar-variable/job-shop-scheduling/src/job_shop_bench/spec.py b/scalar-variable/job-shop-scheduling/src/job_shop_bench/spec.py
index aa1bcfe..80ba1fc 100644
--- a/scalar-variable/job-shop-scheduling/src/job_shop_bench/spec.py
+++ b/scalar-variable/job-shop-scheduling/src/job_shop_bench/spec.py
@@ -6,7 +6,11 @@
 
 from job_shop_bench.domain.models import Solution
 from job_shop_bench.loader import dataset_group_names, instance_metadata, load_instance
-from job_shop_bench.solver.solver import AVAILABLE_METHODS, create_solver, solver_versions
+from job_shop_bench.solver.solver import (
+    AVAILABLE_METHODS,
+    create_solver,
+    solver_versions,
+)
 from job_shop_bench.validation import ValidationError, validate
 from solverforge_bench.model import BenchmarkCase, Evaluation, SolverRun, SolverVersion
 
@@ -17,7 +21,16 @@ class JobShopSpec:
     default_time_limits = [1, 10, 60]
     available_solvers = AVAILABLE_METHODS
     default_solvers = AVAILABLE_METHODS
-    native_columns = ["num_jobs", "num_machines", "num_operations", "source_family", "known_best_makespan", "makespan_gap_to_best"]
+    native_columns = [
+        "num_jobs",
+        "num_machines",
+        "num_operations",
+        "source_family",
+        "known_best_makespan",
+        "lower_bound_makespan",
+        "upper_bound_makespan",
+        "makespan_gap_to_best",
+    ]
     solution_model = Solution
 
     def configure_parser(self, parser: argparse.ArgumentParser) -> None:
@@ -37,8 +50,25 @@ def cases(self, args: argparse.Namespace) -> Iterable[BenchmarkCase]:
         dataset_set = args.dataset_set or ("custom" if args.datasets else "all")
         for name in selected:
             m = meta[name]
-            instance = load_instance(data_dir / m["path"], name=name, family=m["family"])
-            yield BenchmarkCase(dataset="JSPLIB", dataset_set=dataset_set, instance=name, instance_size=instance.num_jobs * instance.num_machines, payload=instance, native_fields={"num_jobs": instance.num_jobs, "num_machines": instance.num_machines, "num_operations": sum(len(j) for j in instance.operations_by_job), "source_family": instance.family, "known_best_makespan": m.get("known_best_makespan")})
+            instance = load_instance(
+                data_dir / m["path"], name=name, family=m["family"]
+            )
+            yield BenchmarkCase(
+                dataset="JSPLIB",
+                dataset_set=dataset_set,
+                instance=name,
+                instance_size=instance.num_jobs * instance.num_machines,
+                payload=instance,
+                native_fields={
+                    "num_jobs": instance.num_jobs,
+                    "num_machines": instance.num_machines,
+                    "num_operations": sum(len(j) for j in instance.operations_by_job),
+                    "source_family": instance.family,
+                    "known_best_makespan": m.get("known_best_makespan"),
+                    "lower_bound_makespan": m.get("lower_bound_makespan"),
+                    "upper_bound_makespan": m.get("upper_bound_makespan"),
+                },
+            )
 
     def create_solver(self, method: str, *, time_limit: int = 60):
         return create_solver(method=method, time_limit=time_limit)
@@ -46,20 +76,37 @@ def create_solver(self, method: str, *, time_limit: int = 60):
     def solver_versions(self, solvers: Iterable[str]) -> dict[str, SolverVersion]:
         return solver_versions(list(solvers))
 
-    def evaluate(self, *, case: BenchmarkCase, run: SolverRun, artifact_dir: Path) -> Evaluation:
+    def evaluate(
+        self, *, case: BenchmarkCase, run: SolverRun, artifact_dir: Path
+    ) -> Evaluation:
         try:
             makespan = validate(case.payload, run.solution)
         except ValidationError as exc:
             return Evaluation(hard_feasible=False, validation_error=str(exc))
         best = case.native_fields.get("known_best_makespan")
         gap = ((makespan - best) / best) if best else None
-        return Evaluation(hard_feasible=True, cost=makespan, reported_cost=getattr(run.solution, "reported_makespan", None), validation_error="", native_fields={"makespan_gap_to_best": gap})
+        return Evaluation(
+            hard_feasible=True,
+            cost=makespan,
+            reported_cost=getattr(run.solution, "reported_makespan", None),
+            validation_error="",
+            native_fields={"makespan_gap_to_best": gap},
+        )
 
     def output_path(self, args: argparse.Namespace, run_stamp: str) -> Path:
-        return Path(args.benchmark_root) / "data" / f"benchmark_job_shop_scheduling_{run_stamp}.csv"
+        return (
+            Path(args.benchmark_root)
+            / "data"
+            / f"benchmark_job_shop_scheduling_{run_stamp}.csv"
+        )
 
     def artifact_dir(self, args: argparse.Namespace, run_stamp: str) -> Path:
-        return Path(args.benchmark_root) / "data" / "artifacts" / f"job_shop_scheduling_{run_stamp}"
+        return (
+            Path(args.benchmark_root)
+            / "data"
+            / "artifacts"
+            / f"job_shop_scheduling_{run_stamp}"
+        )
 
 
 SPEC = JobShopSpec()
diff --git a/scripts/normalize_results.py b/scripts/normalize_results.py
index 6c01dce..6cb5831 100755
--- a/scripts/normalize_results.py
+++ b/scripts/normalize_results.py
@@ -116,6 +116,8 @@ def normalize_global_row(
         "num_operations": as_int(row.get("num_operations")),
         "source_family": blank_to_none(row.get("source_family")),
         "known_best_makespan": as_int(row.get("known_best_makespan")),
+        "lower_bound_makespan": as_int(row.get("lower_bound_makespan")),
+        "upper_bound_makespan": as_int(row.get("upper_bound_makespan")),
         "makespan_gap_to_best": as_float(row.get("makespan_gap_to_best")),
         "source_file": str(source_file),
     }
diff --git a/src/solverforge_bench/csv.py b/src/solverforge_bench/csv.py
index 09b60fa..f780b11 100644
--- a/src/solverforge_bench/csv.py
+++ b/src/solverforge_bench/csv.py
@@ -43,6 +43,8 @@
     "num_operations",
     "source_family",
     "known_best_makespan",
+    "lower_bound_makespan",
+    "upper_bound_makespan",
     "makespan_gap_to_best",
 ]
 

From 029cd2fab10c3e511f413e6b8dca2d02d0b86b6c Mon Sep 17 00:00:00 2001
From: Vittorio Distefano <info@vdistefano.studio>
Date: Sat, 23 May 2026 15:40:05 +0200
Subject: [PATCH 18/29] fix(bench): run benchmark suites on separate cores

Split the pinned benchmark launchers by suite so CVRP, employee scheduling, and job-shop scheduling default to separate CPU cores and can run in parallel without contaminating each other's CPU-isolated timing.

Keep BENCH_CPU=<n> as the intentional force-all-suites override. Add an optional runner-side BENCH_LOCK guard for same-core launches only, and run bench-nightly-db child harnesses concurrently while preserving nonzero exit status.
---
 Makefile                        |  77 ++++++-----
 src/solverforge_bench/runner.py | 231 ++++++++++++++++++--------------
 2 files changed, 181 insertions(+), 127 deletions(-)

diff --git a/Makefile b/Makefile
index 14d71d1..5c4144c 100644
--- a/Makefile
+++ b/Makefile
@@ -33,9 +33,18 @@ BENCH_CONFIG_ARG = $(if $(BENCH_CONFIG),--config "$(BENCH_CONFIG)",)
 NIGHTLY_CONFIG_ARG = $(if $(findstring --config,$(NIGHTLY_ARGS)),,$(if $(BENCH_CONFIG),--config "$(BENCH_CONFIG)",--config "benchmark.nightly.example.toml"))
 BENCH_DB_ARGS := --postgres-url "$(DATABASE_URL)"
 BENCH_PYTHONPATH := src:list-variable/cvrp/src:scalar-variable/employee-scheduling/src:scalar-variable/job-shop-scheduling/src
-BENCH_ENV := OMP_NUM_THREADS=1 MKL_NUM_THREADS=1 PYTHONPATH=$(BENCH_PYTHONPATH)
-BENCH_CPU ?= 0
-PINNED_BENCH := taskset -c $(BENCH_CPU) env $(BENCH_ENV)
+BENCH_CPU ?=
+CVRP_BENCH_CPU ?= $(if $(BENCH_CPU),$(BENCH_CPU),0)
+EMPLOYEE_BENCH_CPU ?= $(if $(BENCH_CPU),$(BENCH_CPU),1)
+JOBSHOP_BENCH_CPU ?= $(if $(BENCH_CPU),$(BENCH_CPU),2)
+BENCH_LOCK_DIR ?= /tmp
+CVRP_BENCH_LOCK ?= $(BENCH_LOCK_DIR)/solverforge-bench-cpu-$(CVRP_BENCH_CPU).lock
+EMPLOYEE_BENCH_LOCK ?= $(BENCH_LOCK_DIR)/solverforge-bench-cpu-$(EMPLOYEE_BENCH_CPU).lock
+JOBSHOP_BENCH_LOCK ?= $(BENCH_LOCK_DIR)/solverforge-bench-cpu-$(JOBSHOP_BENCH_CPU).lock
+BENCH_ENV_COMMON := OMP_NUM_THREADS=1 MKL_NUM_THREADS=1 PYTHONPATH=$(BENCH_PYTHONPATH)
+PINNED_CVRP_BENCH := taskset -c $(CVRP_BENCH_CPU) env $(BENCH_ENV_COMMON) BENCH_CPU=$(CVRP_BENCH_CPU) BENCH_LOCK=$(CVRP_BENCH_LOCK)
+PINNED_EMPLOYEE_BENCH := taskset -c $(EMPLOYEE_BENCH_CPU) env $(BENCH_ENV_COMMON) BENCH_CPU=$(EMPLOYEE_BENCH_CPU) BENCH_LOCK=$(EMPLOYEE_BENCH_LOCK)
+PINNED_JOBSHOP_BENCH := taskset -c $(JOBSHOP_BENCH_CPU) env $(BENCH_ENV_COMMON) BENCH_CPU=$(JOBSHOP_BENCH_CPU) BENCH_LOCK=$(JOBSHOP_BENCH_LOCK)
 
 CVRP_ROOT := list-variable/cvrp
 CVRP_SOLVERFORGE_DIR := $(CVRP_ROOT)/src/cvrp_bench/solver/solverforge
@@ -159,28 +168,28 @@ build-cvrp-solverforge: banner install-python-deps
 	cd $(CVRP_SOLVERFORGE_DIR) && PIP_DISABLE_PIP_VERSION_CHECK=1 maturin develop --release --locked --pip-path "$(PIP)"
 
 bench-cvrp: build-cvrp
-	$(PINNED_BENCH) "$(PYTHON)" scripts/run_benchmark.py cvrp $(BENCH_CONFIG_ARG) $(BENCH_ARGS)
+	$(PINNED_CVRP_BENCH) "$(PYTHON)" scripts/run_benchmark.py cvrp $(BENCH_CONFIG_ARG) $(BENCH_ARGS)
 
 bench-cvrp-db: build-cvrp db-migrate
-	$(PINNED_BENCH) "$(PYTHON)" scripts/run_benchmark.py cvrp $(BENCH_CONFIG_ARG) $(BENCH_DB_ARGS) $(BENCH_ARGS)
+	$(PINNED_CVRP_BENCH) "$(PYTHON)" scripts/run_benchmark.py cvrp $(BENCH_CONFIG_ARG) $(BENCH_DB_ARGS) $(BENCH_ARGS)
 
 bench-cvrp-quick: build-cvrp
-	$(PINNED_BENCH) "$(PYTHON)" scripts/run_benchmark.py cvrp $(BENCH_CONFIG_ARG) --run-kind quick --num-instances 3 --time-limits 1 10 $(BENCH_ARGS)
+	$(PINNED_CVRP_BENCH) "$(PYTHON)" scripts/run_benchmark.py cvrp $(BENCH_CONFIG_ARG) --run-kind quick --num-instances 3 --time-limits 1 10 $(BENCH_ARGS)
 
 bench-cvrp-quick-db: build-cvrp db-migrate
-	$(PINNED_BENCH) "$(PYTHON)" scripts/run_benchmark.py cvrp $(BENCH_CONFIG_ARG) --run-kind quick --num-instances 3 --time-limits 1 10 $(BENCH_DB_ARGS) $(BENCH_ARGS)
+	$(PINNED_CVRP_BENCH) "$(PYTHON)" scripts/run_benchmark.py cvrp $(BENCH_CONFIG_ARG) --run-kind quick --num-instances 3 --time-limits 1 10 $(BENCH_DB_ARGS) $(BENCH_ARGS)
 
 bench-cvrp-solverforge: build-cvrp-solverforge
-	$(PINNED_BENCH) "$(PYTHON)" scripts/run_benchmark.py cvrp $(BENCH_CONFIG_ARG) --solver solverforge $(BENCH_ARGS)
+	$(PINNED_CVRP_BENCH) "$(PYTHON)" scripts/run_benchmark.py cvrp $(BENCH_CONFIG_ARG) --solver solverforge $(BENCH_ARGS)
 
 bench-cvrp-solverforge-db: build-cvrp-solverforge db-migrate
-	$(PINNED_BENCH) "$(PYTHON)" scripts/run_benchmark.py cvrp $(BENCH_CONFIG_ARG) --solver solverforge $(BENCH_DB_ARGS) $(BENCH_ARGS)
+	$(PINNED_CVRP_BENCH) "$(PYTHON)" scripts/run_benchmark.py cvrp $(BENCH_CONFIG_ARG) --solver solverforge $(BENCH_DB_ARGS) $(BENCH_ARGS)
 
 bench-cvrp-solverforge-quick: build-cvrp-solverforge
-	$(PINNED_BENCH) "$(PYTHON)" scripts/run_benchmark.py cvrp $(BENCH_CONFIG_ARG) --run-kind quick --solver solverforge --num-instances 3 --time-limits 1 10 $(BENCH_ARGS)
+	$(PINNED_CVRP_BENCH) "$(PYTHON)" scripts/run_benchmark.py cvrp $(BENCH_CONFIG_ARG) --run-kind quick --solver solverforge --num-instances 3 --time-limits 1 10 $(BENCH_ARGS)
 
 bench-cvrp-solverforge-quick-db: build-cvrp-solverforge db-migrate
-	$(PINNED_BENCH) "$(PYTHON)" scripts/run_benchmark.py cvrp $(BENCH_CONFIG_ARG) --run-kind quick --solver solverforge --num-instances 3 --time-limits 1 10 $(BENCH_DB_ARGS) $(BENCH_ARGS)
+	$(PINNED_CVRP_BENCH) "$(PYTHON)" scripts/run_benchmark.py cvrp $(BENCH_CONFIG_ARG) --run-kind quick --solver solverforge --num-instances 3 --time-limits 1 10 $(BENCH_DB_ARGS) $(BENCH_ARGS)
 
 validate-cvrp: banner
 	cd $(CVRP_ROOT) && PYTHONPATH=src "$(PYTHON)" scripts/validate_all.py
@@ -201,33 +210,41 @@ build-employee-scheduling-solverforge: banner install-python-deps
 	PIP_DISABLE_PIP_VERSION_CHECK=1 "$(PIP)" install --force-reinstall $$(ls -t $(EMPLOYEE_SOLVERFORGE_DIR)/target/wheels/*.whl | head -1)
 
 bench-employee-scheduling: build-employee-scheduling
-	$(PINNED_BENCH) "$(PYTHON)" scripts/run_benchmark.py employee-scheduling $(BENCH_CONFIG_ARG) --dataset-set canonical --time-limits 1 10 60 $(BENCH_ARGS)
+	$(PINNED_EMPLOYEE_BENCH) "$(PYTHON)" scripts/run_benchmark.py employee-scheduling $(BENCH_CONFIG_ARG) --dataset-set canonical --time-limits 1 10 60 $(BENCH_ARGS)
 
 bench-employee-scheduling-db: build-employee-scheduling db-migrate
-	$(PINNED_BENCH) "$(PYTHON)" scripts/run_benchmark.py employee-scheduling $(BENCH_CONFIG_ARG) --dataset-set canonical --time-limits 1 10 60 $(BENCH_DB_ARGS) $(BENCH_ARGS)
+	$(PINNED_EMPLOYEE_BENCH) "$(PYTHON)" scripts/run_benchmark.py employee-scheduling $(BENCH_CONFIG_ARG) --dataset-set canonical --time-limits 1 10 60 $(BENCH_DB_ARGS) $(BENCH_ARGS)
 
 bench-employee-scheduling-quick: build-employee-scheduling
-	$(PINNED_BENCH) "$(PYTHON)" scripts/run_benchmark.py employee-scheduling $(BENCH_CONFIG_ARG) --run-kind quick --datasets n005w4 --time-limits 1 10 $(BENCH_ARGS)
+	$(PINNED_EMPLOYEE_BENCH) "$(PYTHON)" scripts/run_benchmark.py employee-scheduling $(BENCH_CONFIG_ARG) --run-kind quick --datasets n005w4 --time-limits 1 10 $(BENCH_ARGS)
 
 bench-employee-scheduling-quick-db: build-employee-scheduling db-migrate
-	$(PINNED_BENCH) "$(PYTHON)" scripts/run_benchmark.py employee-scheduling $(BENCH_CONFIG_ARG) --run-kind quick --datasets n005w4 --time-limits 1 10 $(BENCH_DB_ARGS) $(BENCH_ARGS)
+	$(PINNED_EMPLOYEE_BENCH) "$(PYTHON)" scripts/run_benchmark.py employee-scheduling $(BENCH_CONFIG_ARG) --run-kind quick --datasets n005w4 --time-limits 1 10 $(BENCH_DB_ARGS) $(BENCH_ARGS)
 
 bench-employee-scheduling-solverforge: build-employee-scheduling-solverforge
-	$(PINNED_BENCH) "$(PYTHON)" scripts/run_benchmark.py employee-scheduling $(BENCH_CONFIG_ARG) --solver solverforge --dataset-set canonical --time-limits 1 10 60 $(BENCH_ARGS)
+	$(PINNED_EMPLOYEE_BENCH) "$(PYTHON)" scripts/run_benchmark.py employee-scheduling $(BENCH_CONFIG_ARG) --solver solverforge --dataset-set canonical --time-limits 1 10 60 $(BENCH_ARGS)
 
 bench-employee-scheduling-solverforge-db: build-employee-scheduling-solverforge db-migrate
-	$(PINNED_BENCH) "$(PYTHON)" scripts/run_benchmark.py employee-scheduling $(BENCH_CONFIG_ARG) --solver solverforge --dataset-set canonical --time-limits 1 10 60 $(BENCH_DB_ARGS) $(BENCH_ARGS)
+	$(PINNED_EMPLOYEE_BENCH) "$(PYTHON)" scripts/run_benchmark.py employee-scheduling $(BENCH_CONFIG_ARG) --solver solverforge --dataset-set canonical --time-limits 1 10 60 $(BENCH_DB_ARGS) $(BENCH_ARGS)
 
 bench-employee-scheduling-solverforge-quick: build-employee-scheduling-solverforge
-	$(PINNED_BENCH) "$(PYTHON)" scripts/run_benchmark.py employee-scheduling $(BENCH_CONFIG_ARG) --run-kind quick --solver solverforge --datasets n005w4 --time-limits 1 10 $(BENCH_ARGS)
+	$(PINNED_EMPLOYEE_BENCH) "$(PYTHON)" scripts/run_benchmark.py employee-scheduling $(BENCH_CONFIG_ARG) --run-kind quick --solver solverforge --datasets n005w4 --time-limits 1 10 $(BENCH_ARGS)
 
 bench-employee-scheduling-solverforge-quick-db: build-employee-scheduling-solverforge db-migrate
-	$(PINNED_BENCH) "$(PYTHON)" scripts/run_benchmark.py employee-scheduling $(BENCH_CONFIG_ARG) --run-kind quick --solver solverforge --datasets n005w4 --time-limits 1 10 $(BENCH_DB_ARGS) $(BENCH_ARGS)
+	$(PINNED_EMPLOYEE_BENCH) "$(PYTHON)" scripts/run_benchmark.py employee-scheduling $(BENCH_CONFIG_ARG) --run-kind quick --solver solverforge --datasets n005w4 --time-limits 1 10 $(BENCH_DB_ARGS) $(BENCH_ARGS)
 
 bench-nightly-db: build-cvrp build-employee-scheduling build-job-shop-scheduling db-migrate
-	$(PINNED_BENCH) "$(PYTHON)" scripts/run_benchmark.py cvrp $(NIGHTLY_CONFIG_ARG) $(BENCH_DB_ARGS) $(NIGHTLY_ARGS)
-	$(PINNED_BENCH) "$(PYTHON)" scripts/run_benchmark.py employee-scheduling $(NIGHTLY_CONFIG_ARG) $(BENCH_DB_ARGS) $(NIGHTLY_ARGS)
-	$(PINNED_BENCH) "$(PYTHON)" scripts/run_benchmark.py job-shop-scheduling $(NIGHTLY_CONFIG_ARG) $(BENCH_DB_ARGS) $(NIGHTLY_ARGS)
+	$(PINNED_CVRP_BENCH) "$(PYTHON)" scripts/run_benchmark.py cvrp $(NIGHTLY_CONFIG_ARG) $(BENCH_DB_ARGS) $(NIGHTLY_ARGS) & \
+	cvrp_pid=$$!; \
+	$(PINNED_EMPLOYEE_BENCH) "$(PYTHON)" scripts/run_benchmark.py employee-scheduling $(NIGHTLY_CONFIG_ARG) $(BENCH_DB_ARGS) $(NIGHTLY_ARGS) & \
+	employee_pid=$$!; \
+	$(PINNED_JOBSHOP_BENCH) "$(PYTHON)" scripts/run_benchmark.py job-shop-scheduling $(NIGHTLY_CONFIG_ARG) $(BENCH_DB_ARGS) $(NIGHTLY_ARGS) & \
+	jobshop_pid=$$!; \
+	status=0; \
+	wait $$cvrp_pid || status=$$?; \
+	wait $$employee_pid || status=$$?; \
+	wait $$jobshop_pid || status=$$?; \
+	exit $$status
 
 validate-employee-scheduling: banner
 	cd $(EMPLOYEE_ROOT) && PYTHONPATH=../../src:../../list-variable/cvrp/src:src "$(PYTHON)" scripts/validate_all.py
@@ -257,28 +274,28 @@ build-job-shop-scheduling-ortools: banner $(ORTOOLS_ROOT)/lib64/cmake/ortools/or
 	cp build/job-shop-scheduling-ortools/job_shop_scheduling_ortools $(JOBSHOP_ORTOOLS_DIR)/target/
 
 bench-job-shop-scheduling: build-job-shop-scheduling
-	$(PINNED_BENCH) "$(PYTHON)" scripts/run_benchmark.py job-shop-scheduling $(BENCH_CONFIG_ARG) --dataset-set canonical --time-limits 1 10 60 $(BENCH_ARGS)
+	$(PINNED_JOBSHOP_BENCH) "$(PYTHON)" scripts/run_benchmark.py job-shop-scheduling $(BENCH_CONFIG_ARG) --dataset-set canonical --time-limits 1 10 60 $(BENCH_ARGS)
 
 bench-job-shop-scheduling-db: build-job-shop-scheduling db-migrate
-	$(PINNED_BENCH) "$(PYTHON)" scripts/run_benchmark.py job-shop-scheduling $(BENCH_CONFIG_ARG) --dataset-set canonical --time-limits 1 10 60 $(BENCH_DB_ARGS) $(BENCH_ARGS)
+	$(PINNED_JOBSHOP_BENCH) "$(PYTHON)" scripts/run_benchmark.py job-shop-scheduling $(BENCH_CONFIG_ARG) --dataset-set canonical --time-limits 1 10 60 $(BENCH_DB_ARGS) $(BENCH_ARGS)
 
 bench-job-shop-scheduling-quick: build-job-shop-scheduling
-	$(PINNED_BENCH) "$(PYTHON)" scripts/run_benchmark.py job-shop-scheduling $(BENCH_CONFIG_ARG) --run-kind quick --dataset-set quick --time-limits 1 10 $(BENCH_ARGS)
+	$(PINNED_JOBSHOP_BENCH) "$(PYTHON)" scripts/run_benchmark.py job-shop-scheduling $(BENCH_CONFIG_ARG) --run-kind quick --dataset-set quick --time-limits 1 10 $(BENCH_ARGS)
 
 bench-job-shop-scheduling-quick-db: build-job-shop-scheduling db-migrate
-	$(PINNED_BENCH) "$(PYTHON)" scripts/run_benchmark.py job-shop-scheduling $(BENCH_CONFIG_ARG) --run-kind quick --dataset-set quick --time-limits 1 10 $(BENCH_DB_ARGS) $(BENCH_ARGS)
+	$(PINNED_JOBSHOP_BENCH) "$(PYTHON)" scripts/run_benchmark.py job-shop-scheduling $(BENCH_CONFIG_ARG) --run-kind quick --dataset-set quick --time-limits 1 10 $(BENCH_DB_ARGS) $(BENCH_ARGS)
 
 bench-job-shop-scheduling-solverforge: build-job-shop-scheduling-solverforge
-	$(PINNED_BENCH) "$(PYTHON)" scripts/run_benchmark.py job-shop-scheduling $(BENCH_CONFIG_ARG) --solver solverforge --dataset-set canonical --time-limits 1 10 60 $(BENCH_ARGS)
+	$(PINNED_JOBSHOP_BENCH) "$(PYTHON)" scripts/run_benchmark.py job-shop-scheduling $(BENCH_CONFIG_ARG) --solver solverforge --dataset-set canonical --time-limits 1 10 60 $(BENCH_ARGS)
 
 bench-job-shop-scheduling-solverforge-db: build-job-shop-scheduling-solverforge db-migrate
-	$(PINNED_BENCH) "$(PYTHON)" scripts/run_benchmark.py job-shop-scheduling $(BENCH_CONFIG_ARG) --solver solverforge --dataset-set canonical --time-limits 1 10 60 $(BENCH_DB_ARGS) $(BENCH_ARGS)
+	$(PINNED_JOBSHOP_BENCH) "$(PYTHON)" scripts/run_benchmark.py job-shop-scheduling $(BENCH_CONFIG_ARG) --solver solverforge --dataset-set canonical --time-limits 1 10 60 $(BENCH_DB_ARGS) $(BENCH_ARGS)
 
 bench-job-shop-scheduling-solverforge-quick: build-job-shop-scheduling-solverforge
-	$(PINNED_BENCH) "$(PYTHON)" scripts/run_benchmark.py job-shop-scheduling $(BENCH_CONFIG_ARG) --run-kind quick --solver solverforge --dataset-set quick --time-limits 1 10 $(BENCH_ARGS)
+	$(PINNED_JOBSHOP_BENCH) "$(PYTHON)" scripts/run_benchmark.py job-shop-scheduling $(BENCH_CONFIG_ARG) --run-kind quick --solver solverforge --dataset-set quick --time-limits 1 10 $(BENCH_ARGS)
 
 bench-job-shop-scheduling-solverforge-quick-db: build-job-shop-scheduling-solverforge db-migrate
-	$(PINNED_BENCH) "$(PYTHON)" scripts/run_benchmark.py job-shop-scheduling $(BENCH_CONFIG_ARG) --run-kind quick --solver solverforge --dataset-set quick --time-limits 1 10 $(BENCH_DB_ARGS) $(BENCH_ARGS)
+	$(PINNED_JOBSHOP_BENCH) "$(PYTHON)" scripts/run_benchmark.py job-shop-scheduling $(BENCH_CONFIG_ARG) --run-kind quick --solver solverforge --dataset-set quick --time-limits 1 10 $(BENCH_DB_ARGS) $(BENCH_ARGS)
 
 validate-job-shop-scheduling: banner
 	cd $(JOBSHOP_ROOT) && PYTHONPATH=../../src:src "$(PYTHON)" scripts/validate_all.py
diff --git a/src/solverforge_bench/runner.py b/src/solverforge_bench/runner.py
index 7880422..ad7e128 100644
--- a/src/solverforge_bench/runner.py
+++ b/src/solverforge_bench/runner.py
@@ -2,7 +2,9 @@
 
 from __future__ import annotations
 
+import fcntl
 import logging
+import os
 from contextlib import ExitStack
 from pathlib import Path
 from typing import Any
@@ -64,114 +66,149 @@ def run_benchmark(spec: BenchmarkSpec, args: Any) -> Path:
         {name: version.version for name, version in solver_versions.items()},
     )
 
-    postgres_writer = None
-    with ExitStack() as stack:
-        writer = stack.enter_context(
-            IncrementalCsvWriter(
-                output_path, columns=benchmark_columns(spec.native_columns)
+    lock_path = _benchmark_lock_path()
+    lock_handle = _acquire_benchmark_lock(lock_path) if lock_path else None
+    try:
+        postgres_writer = None
+        with ExitStack() as stack:
+            writer = stack.enter_context(
+                IncrementalCsvWriter(
+                    output_path, columns=benchmark_columns(spec.native_columns)
+                )
             )
-        )
-        LOGGER.info("csv_writer_opened path=%s", output_path)
-        if args.save_postgres:
-            postgres_writer = stack.enter_context(
-                PostgresResultWriter(
-                    make_postgres_config(
-                        args=args,
-                        spec=spec,
-                        output_path=output_path,
-                        artifact_dir=artifact_dir,
-                        solvers=solvers,
-                        solver_versions=solver_versions,
-                        time_limits=time_limits,
+            LOGGER.info("csv_writer_opened path=%s", output_path)
+            if args.save_postgres:
+                postgres_writer = stack.enter_context(
+                    PostgresResultWriter(
+                        make_postgres_config(
+                            args=args,
+                            spec=spec,
+                            output_path=output_path,
+                            artifact_dir=artifact_dir,
+                            solvers=solvers,
+                            solver_versions=solver_versions,
+                            time_limits=time_limits,
+                        )
                     )
                 )
-            )
-            args.postgres_run_id = str(postgres_writer.run_id)
-            LOGGER.info("postgres_run_opened run_id=%s", args.postgres_run_id)
-
-        for case in spec.cases(args):
-            LOGGER.info(
-                "case_start dataset=%s dataset_set=%s instance=%s instance_size=%s",
-                case.dataset,
-                case.dataset_set,
-                case.instance,
-                case.instance_size,
-            )
-            for time_limit in time_limits:
-                watchdog_seconds = watchdog_limit_seconds(
-                    time_limit,
-                    multiplier=args.watchdog_multiplier,
-                    grace_seconds=args.watchdog_grace_seconds,
+                args.postgres_run_id = str(postgres_writer.run_id)
+                LOGGER.info("postgres_run_opened run_id=%s", args.postgres_run_id)
+
+            for case in spec.cases(args):
+                LOGGER.info(
+                    "case_start dataset=%s dataset_set=%s instance=%s "
+                    "instance_size=%s",
+                    case.dataset,
+                    case.dataset_set,
+                    case.instance,
+                    case.instance_size,
                 )
-                for solver_name in solvers:
-                    stdout_path, stderr_path = solver_output_paths(
-                        log_dir=solver_log_dir,
-                        instance_name=case.instance,
-                        solver_name=solver_name,
-                        time_limit_seconds=time_limit,
-                    )
-                    captured_stdout_path = (
-                        stdout_path if args.capture_solver_output else None
-                    )
-                    captured_stderr_path = (
-                        stderr_path if args.capture_solver_output else None
-                    )
-                    LOGGER.info(
-                        "solver_start instance=%s solver=%s time_limit=%s "
-                        "watchdog=%s stdout=%s stderr=%s",
-                        case.instance,
-                        solver_name,
-                        time_limit,
-                        watchdog_seconds,
-                        captured_stdout_path,
-                        captured_stderr_path,
-                    )
-                    run = run_solver(
-                        solver_name=solver_name,
-                        solver_factory=spec.create_solver,
-                        solution_model=spec.solution_model,
-                        instance=case.payload,
-                        time_limit_seconds=time_limit,
-                        watchdog_seconds=watchdog_seconds,
-                        stdout_path=captured_stdout_path,
-                        stderr_path=captured_stderr_path,
-                        capture_solver_output=args.capture_solver_output,
-                        show_solver_output=args.show_solver_output,
-                    )
-                    evaluation = _evaluate(
-                        spec,
-                        case=case,
-                        run=run,
-                        artifact_dir=artifact_dir,
-                    )
-                    row = _row(
-                        spec=spec,
-                        case=case,
-                        run=run,
-                        evaluation=evaluation,
-                        solver_version=solver_versions[run.solver].version,
-                        wall_time_tolerance=args.wall_time_tolerance,
-                    )
-                    writer.write_row(row.as_dict())
-                    if postgres_writer is not None:
-                        postgres_writer.write_row(row)
-                    LOGGER.info(
-                        "solver_end instance=%s solver=%s time_limit=%s "
-                        "actual_time=%.6f watchdog_killed=%s run_error=%s "
-                        "hard_feasible=%s",
-                        case.instance,
-                        solver_name,
+                for time_limit in time_limits:
+                    watchdog_seconds = watchdog_limit_seconds(
                         time_limit,
-                        run.actual_time_seconds,
-                        run.watchdog_killed,
-                        run.run_error,
-                        evaluation.hard_feasible,
+                        multiplier=args.watchdog_multiplier,
+                        grace_seconds=args.watchdog_grace_seconds,
                     )
+                    for solver_name in solvers:
+                        stdout_path, stderr_path = solver_output_paths(
+                            log_dir=solver_log_dir,
+                            instance_name=case.instance,
+                            solver_name=solver_name,
+                            time_limit_seconds=time_limit,
+                        )
+                        captured_stdout_path = (
+                            stdout_path if args.capture_solver_output else None
+                        )
+                        captured_stderr_path = (
+                            stderr_path if args.capture_solver_output else None
+                        )
+                        LOGGER.info(
+                            "solver_start instance=%s solver=%s time_limit=%s "
+                            "watchdog=%s stdout=%s stderr=%s",
+                            case.instance,
+                            solver_name,
+                            time_limit,
+                            watchdog_seconds,
+                            captured_stdout_path,
+                            captured_stderr_path,
+                        )
+                        run = run_solver(
+                            solver_name=solver_name,
+                            solver_factory=spec.create_solver,
+                            solution_model=spec.solution_model,
+                            instance=case.payload,
+                            time_limit_seconds=time_limit,
+                            watchdog_seconds=watchdog_seconds,
+                            stdout_path=captured_stdout_path,
+                            stderr_path=captured_stderr_path,
+                            capture_solver_output=args.capture_solver_output,
+                            show_solver_output=args.show_solver_output,
+                        )
+                        evaluation = _evaluate(
+                            spec,
+                            case=case,
+                            run=run,
+                            artifact_dir=artifact_dir,
+                        )
+                        row = _row(
+                            spec=spec,
+                            case=case,
+                            run=run,
+                            evaluation=evaluation,
+                            solver_version=solver_versions[run.solver].version,
+                            wall_time_tolerance=args.wall_time_tolerance,
+                        )
+                        writer.write_row(row.as_dict())
+                        if postgres_writer is not None:
+                            postgres_writer.write_row(row)
+                        LOGGER.info(
+                            "solver_end instance=%s solver=%s time_limit=%s "
+                            "actual_time=%.6f watchdog_killed=%s run_error=%s "
+                            "hard_feasible=%s",
+                            case.instance,
+                            solver_name,
+                            time_limit,
+                            run.actual_time_seconds,
+                            run.watchdog_killed,
+                            run.run_error,
+                            evaluation.hard_feasible,
+                        )
+    finally:
+        if lock_handle is not None:
+            _release_benchmark_lock(lock_handle)
 
     LOGGER.info("benchmark_completed benchmark=%s output=%s", spec.name, output_path)
     return output_path
 
 
+def _benchmark_lock_path() -> Path | None:
+    explicit = os.environ.get("BENCH_LOCK") or os.environ.get("SOLVERFORGE_BENCH_LOCK")
+    if explicit:
+        return Path(explicit)
+    return None
+
+
+def _acquire_benchmark_lock(lock_path: Path):
+    lock_path.parent.mkdir(parents=True, exist_ok=True)
+    handle = lock_path.open("a+", encoding="utf-8")
+    LOGGER.info("benchmark_lock_wait path=%s", lock_path)
+    fcntl.flock(handle.fileno(), fcntl.LOCK_EX)
+    handle.seek(0)
+    handle.truncate()
+    handle.write(f"pid={os.getpid()}\n")
+    handle.flush()
+    LOGGER.info("benchmark_lock_acquired path=%s", lock_path)
+    return handle
+
+
+def _release_benchmark_lock(handle) -> None:
+    try:
+        fcntl.flock(handle.fileno(), fcntl.LOCK_UN)
+        LOGGER.info("benchmark_lock_released path=%s", handle.name)
+    finally:
+        handle.close()
+
+
 def _evaluate(spec: BenchmarkSpec, *, case, run, artifact_dir: Path) -> Evaluation:
     if run.solution is None:
         return Evaluation(hard_feasible=None)

From 77c8dc33d1736c8b5095b42d39feb32e2328bc58 Mon Sep 17 00:00:00 2001
From: Vittorio Distefano <info@vdistefano.studio>
Date: Sat, 23 May 2026 15:40:15 +0200
Subject: [PATCH 19/29] docs: align benchmark documentation

Document the expanded job-shop benchmark surface, including the full bundled JSPLIB corpus, native bound metadata, and result schema columns.

Update the operator and wireframe docs for per-suite CPU pinning, per-core benchmark locks, and parallel nightly benchmark execution so the docs match the committed Makefile behavior.
---
 AGENTS.md    |  9 +++++---
 README.md    | 42 +++++++++++++++++++++--------------
 WIREFRAME.md | 63 +++++++++++++++++++++++++++++++++++++++++++---------
 3 files changed, 84 insertions(+), 30 deletions(-)

diff --git a/AGENTS.md b/AGENTS.md
index 2dae42c..9941bcb 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -43,9 +43,12 @@
   uses the sibling checkout at `../solverforge/crates/solverforge`. The
   employee-scheduling SolverForge adapter uses the `0.15.0` node-sharing
   compiler branch at `../solverforge-node-sharing/crates/solverforge`.
-- Benchmark run targets pin the shared harness with `taskset -c $(BENCH_CPU)`;
-  `BENCH_CPU` defaults to `0`. They also set `OMP_NUM_THREADS=1` and
-  `MKL_NUM_THREADS=1`.
+- Benchmark run targets pin the shared harness with per-suite CPU defaults:
+  `CVRP_BENCH_CPU ?= 0`, `EMPLOYEE_BENCH_CPU ?= 1`, and
+  `JOBSHOP_BENCH_CPU ?= 2`. They also set `OMP_NUM_THREADS=1`,
+  `MKL_NUM_THREADS=1`, and per-core `BENCH_LOCK` values so different suites can
+  run in parallel while accidental same-core runs serialize. `BENCH_CPU=<n>`
+  intentionally forces all suites onto one core.
 - `make validate-cvrp` validates all bundled CVRP `.vrp`/`.sol` pairs.
 - `make build-cvrp` builds Python dependencies plus CVRP Timefold, SolverForge,
   OR-Tools, rustvrp, and VROOM integrations.
diff --git a/README.md b/README.md
index d6f364b..191c09e 100644
--- a/README.md
+++ b/README.md
@@ -20,11 +20,12 @@ See `WIREFRAME.md` for the current as-built repository map.
   uses the bundled INRC-II TXT corpus and compares `solverforge`,
   `timefold`, and `ortools` on nurse-to-shift assignments.
 - `scalar-variable/job-shop-scheduling/` is the job-shop scheduling benchmark. It
-  uses bundled JSPLIB instances for machine scheduling with job precedence
-  and disjunctive machine capacity constraints. It compares `solverforge`,
-  `timefold`, and `ortools` on fixed-machine operation start times. The
-  SolverForge adapter is a Rust/PyO3 planning model, the Timefold adapter is a
-  Java fat JAR, and the OR-Tools adapter is a native C++ CP-SAT executable.
+  uses the bundled classic JSPLIB corpus for machine scheduling with job
+  precedence and disjunctive machine capacity constraints. It compares
+  `solverforge`, `timefold`, and `ortools` on fixed-machine operation start
+  times. The SolverForge adapter is a Rust/PyO3 planning model, the Timefold
+  adapter is a Java fat JAR, and the OR-Tools adapter is a native C++ CP-SAT
+  executable.
 
 ## Documentation Map
 
@@ -56,9 +57,12 @@ employee-scheduling SolverForge adapter uses the `0.15.0` node-sharing compiler
 branch at `../solverforge-node-sharing/crates/solverforge`. Keep CI or local
 bootstrap checkouts aligned to those Cargo paths.
 
-Benchmark run targets execute the shared harness through `taskset` on
-`BENCH_CPU`, which defaults to CPU `0`, and set `OMP_NUM_THREADS=1` plus
-`MKL_NUM_THREADS=1`. Override `BENCH_CPU` for a different pinned core.
+Benchmark run targets execute the shared harness through `taskset` with
+different default pinned cores: `CVRP_BENCH_CPU ?= 0`,
+`EMPLOYEE_BENCH_CPU ?= 1`, and `JOBSHOP_BENCH_CPU ?= 2`. They set
+`OMP_NUM_THREADS=1`, `MKL_NUM_THREADS=1`, and a per-core `BENCH_LOCK`; runs on
+different cores can proceed in parallel, while accidental same-core runs
+serialize. Set `BENCH_CPU=<n>` to intentionally force all suites onto one core.
 
 ## CI
 
@@ -175,7 +179,10 @@ and `ortools` at `1` and `10` seconds. The canonical target uses the
 `canonical` group in
 `scalar-variable/job-shop-scheduling/data/jsplib/manifest.json`.
 In the current bundled manifest, `quick` contains `ft06` and `la01`, while
-`canonical` contains `ft06`, `la01`, and `la02`.
+`canonical` contains all 162 classic JSPLIB instances from `tamy0612/JSPLIB`
+(`abz`, `ft`, `la`, `orb`, `swv`, `ta`, and `yn`). The manifest records the
+upstream source URL and known optimum or lower/upper bounds when the upstream
+metadata provides them.
 
 ## Unified Harness
 
@@ -400,18 +407,19 @@ make bench-nightly-db
 
 `make bench-nightly-db` is the cron entrypoint. It builds all benchmark stacks,
 applies migrations once, then calls `scripts/run_benchmark.py` directly for
-CVRP, employee scheduling, and job-shop scheduling. By default it uses
-`benchmark.nightly.example.toml`; set `BENCH_CONFIG` for a different nightly
-config, or append explicit child harness overrides with `NIGHTLY_ARGS`. It does
-not pass `--solver`, so each benchmark uses its full default solver set.
+CVRP, employee scheduling, and job-shop scheduling in parallel on their
+per-suite pinned cores. By default it uses `benchmark.nightly.example.toml`;
+set `BENCH_CONFIG` for a different nightly config, or append explicit child
+harness overrides with `NIGHTLY_ARGS`. It does not pass `--solver`, so each
+benchmark uses its full default solver set.
 
 ## Result Schema
 
 Benchmark runs now write one global snake_case CSV schema directly. Native
 problem fields are stable optional columns, for example `nurses`, `weeks`,
 `validator_model_delta`, `score_drift`, `num_jobs`, `num_machines`,
-`num_operations`, `source_family`, `known_best_makespan`, and
-`makespan_gap_to_best`.
+`num_operations`, `source_family`, `known_best_makespan`,
+`lower_bound_makespan`, `upper_bound_makespan`, and `makespan_gap_to_best`.
 
 PostgreSQL stores run-level catalog data in `benchmark_runs`, one solver-version
 row per solver involved in the run in `benchmark_solver_versions`, and one row
@@ -456,6 +464,6 @@ watchdog_limit_seconds, watchdog_killed, run_error, solver_stdout_path,
 solver_stderr_path, hard_feasible, cost, reported_cost, fresh_cost,
 reference_cost, quality_ratio, validation_error, solution_artifact, nurses,
 weeks, validator_model_delta, score_drift, num_jobs, num_machines,
-num_operations, source_family, known_best_makespan, makespan_gap_to_best,
-source_file
+num_operations, source_family, known_best_makespan, lower_bound_makespan,
+upper_bound_makespan, makespan_gap_to_best, source_file
 ```
diff --git a/WIREFRAME.md b/WIREFRAME.md
index 60eb763..b82d0bb 100644
--- a/WIREFRAME.md
+++ b/WIREFRAME.md
@@ -8,7 +8,8 @@ persistence, or CI changes, update this file with `README.md` and `AGENTS.md`.
 
 - `pyproject.toml` declares the Python 3.14 package, shared dependencies, and
   package discovery across `src/`, `list-variable/cvrp/src/`, and
-  `scalar-variable/employee-scheduling/src/`.
+  `scalar-variable/employee-scheduling/src/`, and
+  `scalar-variable/job-shop-scheduling/src/`.
 - `Makefile` is the root build and execution surface. It owns virtualenv setup,
   native adapter builds, benchmark smoke/full runs, database helpers,
   normalization, the SolverForge banner, and CPU-pinned harness execution.
@@ -22,21 +23,23 @@ persistence, or CI changes, update this file with `README.md` and `AGENTS.md`.
 - `list-variable/cvrp/` is the list-variable benchmark package for CVRP.
 - `scalar-variable/employee-scheduling/` is the scalar-variable benchmark
   package for INRC-II nurse scheduling.
+- `scalar-variable/job-shop-scheduling/` is the scalar-variable benchmark
+  package for classic JSPLIB job-shop scheduling.
 - `migrations/` holds SQLx-compatible PostgreSQL warehouse migrations.
 - `.github/workflows/ci.yml` holds the split GitHub/Forgejo CI workflow.
 - `archive/` holds historical reports and older standalone scripts only.
 
 ## Shared Harness Flow
 
-1. `scripts/run_benchmark.py` bootstraps into the root `.venv`, adds the three
+1. `scripts/run_benchmark.py` bootstraps into the root `.venv`, adds the four
    source roots to `sys.path`, and delegates to `solverforge_bench.cli.main`.
    `scripts/verify_model_parity.py` uses the same virtualenv bootstrap before
    importing the employee-scheduling package.
 2. `cli.py` loads optional TOML configuration, selects the benchmark spec,
    applies CLI overrides, finalizes run catalog fields, validates solver names,
    and passes the selected spec to `runner.py`.
-3. `registry.py` exposes the canonical benchmark specs: `cvrp` and
-   `employee-scheduling`.
+3. `registry.py` exposes the canonical benchmark specs: `cvrp`,
+   `employee-scheduling`, and `job-shop-scheduling`.
 4. `runner.py` resolves cases, time limits, solvers, solver versions, output
    paths, artifact paths, run logs, and solver output paths. It then iterates
    `case -> time_limit -> solver`.
@@ -57,6 +60,7 @@ persistence, or CI changes, update this file with `README.md` and `AGENTS.md`.
 | --- | --- | --- | --- | --- |
 | `cvrp` | `list_variable` | `pyvrp`, `ortools`, `vroom`, `timefold`, `rustvrp`, `pyhygese`, `solverforge` | `1`, `10`, `60` | none |
 | `employee-scheduling` | `scalar_variable` | `solverforge`, `timefold`, `ortools` | `1`, `10`, `60` | `nurses`, `weeks`, `validator_model_delta`, `score_drift` |
+| `job-shop-scheduling` | `scalar_variable` | `solverforge`, `timefold`, `ortools` | `1`, `10`, `60` | `num_jobs`, `num_machines`, `num_operations`, `source_family`, `known_best_makespan`, `lower_bound_makespan`, `upper_bound_makespan`, `makespan_gap_to_best` |
 
 ## CVRP Adapter Shape
 
@@ -113,6 +117,24 @@ persistence, or CI changes, update this file with `README.md` and `AGENTS.md`.
   and `random_seed = 1`. It intentionally does not impose an independent
   termination cap; the shared harness passes the requested benchmark budget.
 
+## Job-Shop Scheduling Adapter Shape
+
+- Data lives under `scalar-variable/job-shop-scheduling/data/jsplib/` as bundled
+  classic JSPLIB instance files sourced from `tamy0612/JSPLIB`.
+- `manifest.json` defines dataset groups: `quick` has `ft06` and `la01`, and
+  `canonical` has all 162 bundled JSPLIB instances across `abz`, `ft`, `la`,
+  `orb`, `swv`, `ta`, and `yn`.
+- `loader.py` parses standard JSPLIB text files with optional comments.
+- `validation.py` is the shared Python referee. It checks operation coverage,
+  job precedence, machine non-overlap, and returned makespan.
+- `spec.py` exposes `--dataset-set` and `--datasets`, reports JSPLIB family,
+  size, known optimum, lower/upper bounds, and makespan gap through native
+  columns.
+- `solver/solver.py` registers `solverforge`, `timefold`, and `ortools`.
+- The SolverForge JSSP adapter is pinned to SolverForge `0.14.1` and resolves
+  the sibling checkout at `../solverforge/crates/solverforge` from the
+  repository root.
+
 ## Makefile Contract
 
 - `make install-python-deps` creates or refreshes the root `.venv`.
@@ -120,6 +142,8 @@ persistence, or CI changes, update this file with `README.md` and `AGENTS.md`.
   OR-Tools, rustvrp, and VROOM integrations.
 - `make build-employee-scheduling` builds Python dependencies plus employee
   Timefold, SolverForge, and OR-Tools integrations.
+- `make build-job-shop-scheduling` builds Python dependencies plus job-shop
+  Timefold, SolverForge, and OR-Tools integrations.
 - `make bench-cvrp-quick` runs three CVRP instances at 1 and 10 seconds with
   all registered CVRP solvers.
 - `make bench-cvrp-quick-db` runs the same CVRP smoke path after applying
@@ -136,17 +160,31 @@ persistence, or CI changes, update this file with `README.md` and `AGENTS.md`.
   employee slice with only SolverForge.
 - `make bench-employee-scheduling-solverforge-quick-db` persists that same
   SolverForge-only employee smoke path after applying migrations.
-- `make bench-cvrp` and `make bench-employee-scheduling` run canonical
-  benchmark paths at 1, 10, and 60 seconds.
-- `make bench-nightly-db` builds both benchmark stacks, applies migrations once,
-  and invokes the root harness once for CVRP and once for employee scheduling.
+- `make bench-job-shop-scheduling-quick` runs `ft06` and `la01` at 1 and 10
+  seconds with all registered job-shop solvers.
+- `make bench-job-shop-scheduling-quick-db` runs the same job-shop smoke path
+  after applying migrations and persists it to PostgreSQL.
+- `make bench-job-shop-scheduling-solverforge-quick` runs the same quick
+  job-shop slice with only SolverForge.
+- `make bench-job-shop-scheduling-solverforge-quick-db` persists that same
+  SolverForge-only job-shop smoke path after applying migrations.
+- `make bench-cvrp`, `make bench-employee-scheduling`, and
+  `make bench-job-shop-scheduling` run canonical benchmark paths at 1, 10, and
+  60 seconds.
+- `make bench-nightly-db` builds all benchmark stacks, applies migrations once,
+  and invokes the root harness for CVRP, employee scheduling, and job-shop
+  scheduling in parallel on their per-suite pinned cores.
 - `make db-check`, `make db-create`, `make db-migrate`, and `make db-reset`
   operate on `DATABASE_URL`, then `BENCH_DATABASE_URL`, then
   `postgresql://postgres@localhost/solverforge_bench`.
 - `make normalize-results` converts generated global CSV artifacts to normalized
   CSV or NDJSON through `scripts/normalize_results.py`.
-- Benchmark run targets use `taskset -c $(BENCH_CPU)` with `BENCH_CPU ?= 0` and
-  set `OMP_NUM_THREADS=1` and `MKL_NUM_THREADS=1`.
+- Benchmark run targets use per-suite pinned cores:
+  `CVRP_BENCH_CPU ?= 0`, `EMPLOYEE_BENCH_CPU ?= 1`, and
+  `JOBSHOP_BENCH_CPU ?= 2`. They set `OMP_NUM_THREADS=1`, `MKL_NUM_THREADS=1`,
+  and per-core `BENCH_LOCK` values so different suites can run in parallel
+  while accidental same-core runs serialize. `BENCH_CPU=<n>` intentionally
+  forces all suites onto one core.
 - Override child harness arguments with `BENCH_ARGS`, nightly child arguments
   with `NIGHTLY_ARGS`, config path with `BENCH_CONFIG`, and SQLx reset flags
   with `DB_RESET_FLAGS`.
@@ -161,6 +199,7 @@ persistence, or CI changes, update this file with `README.md` and `AGENTS.md`.
   `capture_solver_output`.
 - `[benchmarks.cvrp]` accepts `num_instances`.
 - `[benchmarks.employee-scheduling]` accepts `dataset_set` and `datasets`.
+- `[benchmarks.job-shop-scheduling]` accepts `dataset_set` and `datasets`.
 - `run_kind` is one of `quick`, `candidate`, or `tag`; `tag` requires
   `release_tag`.
 - A CLI `--postgres-url` enables PostgreSQL persistence unless
@@ -174,8 +213,12 @@ persistence, or CI changes, update this file with `README.md` and `AGENTS.md`.
 - CVRP output defaults to `list-variable/cvrp/data/benchmark_cvrp_<stamp>.csv`.
 - Employee scheduling output defaults to
   `scalar-variable/employee-scheduling/data/benchmark_employee_scheduling_<stamp>.csv`.
+- Job-shop scheduling output defaults to
+  `scalar-variable/job-shop-scheduling/data/benchmark_job_shop_scheduling_<stamp>.csv`.
 - Employee scheduling solution artifacts are written under
   `scalar-variable/employee-scheduling/data/artifacts/employee_scheduling_<stamp>/`.
+- Job-shop scheduling solution artifacts are written under
+  `scalar-variable/job-shop-scheduling/data/artifacts/job_shop_scheduling_<stamp>/`.
 - PostgreSQL stores run catalog rows in `benchmark_runs`, solver-version rows in
   `benchmark_solver_versions`, and result rows in `benchmark_results`.
 - `benchmark_result_facts`, `latest_benchmark_runs`, and

From 21301bfd9ebc3405779d4b42b99c4fc585cea71b Mon Sep 17 00:00:00 2001
From: Vittorio Distefano <info@vdistefano.studio>
Date: Thu, 28 May 2026 16:57:36 +0200
Subject: [PATCH 20/29] chore(bench): align SolverForge adapter dependencies

Point the active CVRP and employee-scheduling SolverForge adapters at the shared ../solverforge checkout and SolverForge 0.15.1 line instead of the older release/node-sharing paths. This keeps local, CI, and smoke-run builds on the same upstream source tree.

Refresh the affected lockfiles with the offline Cargo resolver so --locked checks and maturin builds use the checked-in dependency graph. Also make employee validation tolerate missing reference costs before comparing positive published costs.

Validated with cargo check --locked for the CVRP SolverForge and employee SolverForge crates, plus the final quick DB smoke suite.
---
 .../cvrp_bench/solver/solverforge/Cargo.lock  |  75 ++++++----
 .../cvrp_bench/solver/solverforge/Cargo.toml  |   2 +-
 .../scripts/validate_all.py                   |   2 +-
 .../solver/solverforge_nrp/Cargo.lock         | 131 ++++++++++--------
 .../solver/solverforge_nrp/Cargo.toml         |   2 +-
 5 files changed, 123 insertions(+), 89 deletions(-)

diff --git a/list-variable/cvrp/src/cvrp_bench/solver/solverforge/Cargo.lock b/list-variable/cvrp/src/cvrp_bench/solver/solverforge/Cargo.lock
index de49831..e9b64e1 100644
--- a/list-variable/cvrp/src/cvrp_bench/solver/solverforge/Cargo.lock
+++ b/list-variable/cvrp/src/cvrp_bench/solver/solverforge/Cargo.lock
@@ -10,9 +10,9 @@ checksum = "7f202df86484c868dbad7eaa557ef785d5c66295e41b460ef922eca0723b842c"
 
 [[package]]
 name = "bitflags"
-version = "2.11.0"
+version = "2.11.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "843867be96c8daad0d758b57df9392b6d8d271134fce549de6ce169ff98a92af"
+checksum = "c4512299f36f043ab09a583e57bceb5a5aab7a73db1805848e8fef3c9e8c78b3"
 
 [[package]]
 name = "bytes"
@@ -73,9 +73,9 @@ checksum = "d0a5c400df2834b80a4c3327b3aad3a4c4cd4de0629063962b03235697506a28"
 
 [[package]]
 name = "either"
-version = "1.15.0"
+version = "1.16.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "48c757948c5ede0e46177b7add2e67155f70e33c07fea8284df6576da70b3719"
+checksum = "91622ff5e7162018101f2fea40d6ebf4a78bbe5a49736a2020649edf9693679e"
 
 [[package]]
 name = "equivalent"
@@ -124,9 +124,9 @@ dependencies = [
 
 [[package]]
 name = "hashbrown"
-version = "0.17.0"
+version = "0.17.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4f467dd6dccf739c208452f8014c75c18bb8301b050ad1cfb27153803edb0f51"
+checksum = "ed5909b6e89a2db4456e54cd5f673791d7eca6732202bbf2a9cc504fe2f9b84a"
 
 [[package]]
 name = "heck"
@@ -147,7 +147,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d466e9454f08e4a911e14806c24e16fba1b4c121d1ea474396f396069cf949d9"
 dependencies = [
  "equivalent",
- "hashbrown 0.17.0",
+ "hashbrown 0.17.1",
  "serde",
  "serde_core",
 ]
@@ -166,9 +166,9 @@ checksum = "09edd9e8b54e49e587e4f6295a7d29c3ea94d469cb40ab8ca70b288248a81db2"
 
 [[package]]
 name = "libc"
-version = "0.2.184"
+version = "0.2.186"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "48f5d2a454e16a5ea0f4ced81bd44e4cfc7bd3a507b61887c99fd3538b28e4af"
+checksum = "68ab91017fe16c622486840e4c83c9a37afeff978bd239b5293d61ece587de66"
 
 [[package]]
 name = "lock_api"
@@ -181,9 +181,9 @@ dependencies = [
 
 [[package]]
 name = "log"
-version = "0.4.29"
+version = "0.4.30"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5e5032e24019045c762d3c0f28f5b6b8bbf38563a65908389bf7978758920897"
+checksum = "616ec5685824bcc94416c6d4a7a446eea774a31efd7062c8480ba6fd06d7a6e5"
 
 [[package]]
 name = "memchr"
@@ -367,9 +367,9 @@ dependencies = [
 
 [[package]]
 name = "rand_core"
-version = "0.10.0"
+version = "0.10.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0c8d0fd677905edcbeedbf2edb6494d676f0e98d54d5cf9bda0b061cb8fb8aba"
+checksum = "63b8176103e19a2643978565ca18b50549f6101881c443590420e4dc998a3c69"
 
 [[package]]
 name = "rayon"
@@ -450,9 +450,9 @@ dependencies = [
 
 [[package]]
 name = "serde_json"
-version = "1.0.149"
+version = "1.0.150"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "83fc039473c5595ace860d8c4fafa220ff474b3fc6bfdb4293327f1a37e94d86"
+checksum = "e8014e44b4736ed0538adeecded0fce2a272f22dc9578a7eb6b2d9993c74cfb9"
 dependencies = [
  "itoa",
  "memchr",
@@ -516,13 +516,14 @@ dependencies = [
  "pyo3",
  "serde",
  "serde_json",
- "solverforge 0.14.1",
+ "solverforge 0.15.1",
 ]
 
 [[package]]
 name = "solverforge"
-version = "0.14.1"
+version = "0.15.1"
 dependencies = [
+ "solverforge-bridge",
  "solverforge-config",
  "solverforge-core",
  "solverforge-cvrp",
@@ -532,9 +533,19 @@ dependencies = [
  "tokio",
 ]
 
+[[package]]
+name = "solverforge-bridge"
+version = "0.15.1"
+dependencies = [
+ "solverforge-config",
+ "solverforge-core",
+ "solverforge-scoring",
+ "solverforge-solver",
+]
+
 [[package]]
 name = "solverforge-config"
-version = "0.14.1"
+version = "0.15.1"
 dependencies = [
  "serde",
  "serde_yaml",
@@ -545,21 +556,21 @@ dependencies = [
 
 [[package]]
 name = "solverforge-core"
-version = "0.14.1"
+version = "0.15.1"
 dependencies = [
  "thiserror",
 ]
 
 [[package]]
 name = "solverforge-cvrp"
-version = "0.14.1"
+version = "0.15.1"
 dependencies = [
  "solverforge-solver",
 ]
 
 [[package]]
 name = "solverforge-macros"
-version = "0.14.1"
+version = "0.15.1"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -568,7 +579,7 @@ dependencies = [
 
 [[package]]
 name = "solverforge-scoring"
-version = "0.14.1"
+version = "0.15.1"
 dependencies = [
  "solverforge-core",
  "thiserror",
@@ -576,7 +587,7 @@ dependencies = [
 
 [[package]]
 name = "solverforge-solver"
-version = "0.14.1"
+version = "0.15.1"
 dependencies = [
  "rand",
  "rand_chacha",
@@ -752,11 +763,11 @@ checksum = "ccf3ec651a847eb01de73ccad15eb7d99f80485de043efb2f370cd654f4ea44b"
 
 [[package]]
 name = "wasip2"
-version = "1.0.2+wasi-0.2.9"
+version = "1.0.3+wasi-0.2.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9517f9239f02c069db75e65f174b3da828fe5f5b945c4dd26bd25d89c03ebcf5"
+checksum = "20064672db26d7cdc89c7798c48a0fdfac8213434a1186e5ef29fd560ae223d6"
 dependencies = [
- "wit-bindgen",
+ "wit-bindgen 0.57.1",
 ]
 
 [[package]]
@@ -765,7 +776,7 @@ version = "0.4.0+wasi-0.3.0-rc-2026-01-06"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5428f8bf88ea5ddc08faddef2ac4a67e390b88186c703ce6dbd955e1c145aca5"
 dependencies = [
- "wit-bindgen",
+ "wit-bindgen 0.51.0",
 ]
 
 [[package]]
@@ -819,9 +830,9 @@ dependencies = [
 
 [[package]]
 name = "winnow"
-version = "1.0.1"
+version = "1.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "09dac053f1cd375980747450bfc7250c264eaae0583872e845c0c7cd578872b5"
+checksum = "0592e1c9d151f854e6fd382574c3a0855250e1d9b2f99d9281c6e6391af352f1"
 
 [[package]]
 name = "wit-bindgen"
@@ -832,6 +843,12 @@ dependencies = [
  "wit-bindgen-rust-macro",
 ]
 
+[[package]]
+name = "wit-bindgen"
+version = "0.57.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1ebf944e87a7c253233ad6766e082e3cd714b5d03812acc24c318f549614536e"
+
 [[package]]
 name = "wit-bindgen-core"
 version = "0.51.0"
diff --git a/list-variable/cvrp/src/cvrp_bench/solver/solverforge/Cargo.toml b/list-variable/cvrp/src/cvrp_bench/solver/solverforge/Cargo.toml
index b4e1652..57e8dd7 100644
--- a/list-variable/cvrp/src/cvrp_bench/solver/solverforge/Cargo.toml
+++ b/list-variable/cvrp/src/cvrp_bench/solver/solverforge/Cargo.toml
@@ -10,7 +10,7 @@ name = "solverforge_cvrp"
 crate-type = ["cdylib"]
 
 [dependencies]
-solverforge = { version = "0.14.1", path = "../../../../../../../solverforge/crates/solverforge" }
+solverforge = { version = "0.15.1", path = "../../../../../../../solverforge/crates/solverforge" }
 pyo3 = { version = "0.28", features = ["extension-module"] }
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
diff --git a/scalar-variable/employee-scheduling/scripts/validate_all.py b/scalar-variable/employee-scheduling/scripts/validate_all.py
index 2606c5b..3f82476 100644
--- a/scalar-variable/employee-scheduling/scripts/validate_all.py
+++ b/scalar-variable/employee-scheduling/scripts/validate_all.py
@@ -24,7 +24,7 @@ def main() -> None:
         solution = load_solution(inst_info["solution_dir"])
         cost = validate(solution, instance)
 
-        if solution.cost > 0 and cost != solution.cost:
+        if solution.cost is not None and solution.cost > 0 and cost != solution.cost:
             raise AssertionError(
                 f"{inst_info['name']}: validator cost mismatch, local={cost}, reference={solution.cost}"
             )
diff --git a/scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/solverforge_nrp/Cargo.lock b/scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/solverforge_nrp/Cargo.lock
index 56aa3f6..36c70b7 100644
--- a/scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/solverforge_nrp/Cargo.lock
+++ b/scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/solverforge_nrp/Cargo.lock
@@ -10,9 +10,9 @@ checksum = "7f202df86484c868dbad7eaa557ef785d5c66295e41b460ef922eca0723b842c"
 
 [[package]]
 name = "bitflags"
-version = "2.11.0"
+version = "2.11.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "843867be96c8daad0d758b57df9392b6d8d271134fce549de6ce169ff98a92af"
+checksum = "c4512299f36f043ab09a583e57bceb5a5aab7a73db1805848e8fef3c9e8c78b3"
 
 [[package]]
 name = "bytes"
@@ -34,7 +34,7 @@ checksum = "6f8d983286843e49675a4b7a2d174efe136dc93a18d69130dd18198a6c167601"
 dependencies = [
  "cfg-if",
  "cpufeatures",
- "rand_core 0.10.0",
+ "rand_core 0.10.1",
 ]
 
 [[package]]
@@ -73,9 +73,9 @@ checksum = "d0a5c400df2834b80a4c3327b3aad3a4c4cd4de0629063962b03235697506a28"
 
 [[package]]
 name = "either"
-version = "1.15.0"
+version = "1.16.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "48c757948c5ede0e46177b7add2e67155f70e33c07fea8284df6576da70b3719"
+checksum = "91622ff5e7162018101f2fea40d6ebf4a78bbe5a49736a2020649edf9693679e"
 
 [[package]]
 name = "equivalent"
@@ -120,7 +120,7 @@ dependencies = [
  "cfg-if",
  "libc",
  "r-efi 6.0.0",
- "rand_core 0.10.0",
+ "rand_core 0.10.1",
  "wasip2",
  "wasip3",
 ]
@@ -136,9 +136,9 @@ dependencies = [
 
 [[package]]
 name = "hashbrown"
-version = "0.16.1"
+version = "0.17.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "841d1cc9bed7f9236f321df977030373f4a4163ae1a7dbfe1a51a2c1a51d9100"
+checksum = "ed5909b6e89a2db4456e54cd5f673791d7eca6732202bbf2a9cc504fe2f9b84a"
 
 [[package]]
 name = "heck"
@@ -154,21 +154,21 @@ checksum = "3d3067d79b975e8844ca9eb072e16b31c3c1c36928edf9c6789548c524d0d954"
 
 [[package]]
 name = "indexmap"
-version = "2.13.0"
+version = "2.14.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7714e70437a7dc3ac8eb7e6f8df75fd8eb422675fc7678aff7364301092b1017"
+checksum = "d466e9454f08e4a911e14806c24e16fba1b4c121d1ea474396f396069cf949d9"
 dependencies = [
  "equivalent",
- "hashbrown 0.16.1",
+ "hashbrown 0.17.1",
  "serde",
  "serde_core",
 ]
 
 [[package]]
 name = "itoa"
-version = "1.0.17"
+version = "1.0.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "92ecc6618181def0457392ccd0ee51198e065e016d1d527a7ac1b6dc7c1f09d2"
+checksum = "8f42a60cbdf9a97f5d2305f08a87dc4e09308d1276d28c869c684d7777685682"
 
 [[package]]
 name = "leb128fmt"
@@ -178,9 +178,9 @@ checksum = "09edd9e8b54e49e587e4f6295a7d29c3ea94d469cb40ab8ca70b288248a81db2"
 
 [[package]]
 name = "libc"
-version = "0.2.183"
+version = "0.2.186"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b5b646652bf6661599e1da8901b3b9522896f01e736bad5f723fe7a3a27f899d"
+checksum = "68ab91017fe16c622486840e4c83c9a37afeff978bd239b5293d61ece587de66"
 
 [[package]]
 name = "lock_api"
@@ -193,9 +193,9 @@ dependencies = [
 
 [[package]]
 name = "log"
-version = "0.4.29"
+version = "0.4.30"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5e5032e24019045c762d3c0f28f5b6b8bbf38563a65908389bf7978758920897"
+checksum = "616ec5685824bcc94416c6d4a7a446eea774a31efd7062c8480ba6fd06d7a6e5"
 
 [[package]]
 name = "memchr"
@@ -285,9 +285,9 @@ dependencies = [
 
 [[package]]
 name = "pyo3"
-version = "0.28.2"
+version = "0.28.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cf85e27e86080aafd5a22eae58a162e133a589551542b3e5cee4beb27e54f8e1"
+checksum = "91fd8e38a3b50ed1167fb981cd6fd60147e091784c427b8f7183a7ee32c31c12"
 dependencies = [
  "libc",
  "once_cell",
@@ -299,18 +299,18 @@ dependencies = [
 
 [[package]]
 name = "pyo3-build-config"
-version = "0.28.2"
+version = "0.28.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8bf94ee265674bf76c09fa430b0e99c26e319c945d96ca0d5a8215f31bf81cf7"
+checksum = "e368e7ddfdeb98c9bca7f8383be1648fd84ab466bf2bc015e94008db6d35611e"
 dependencies = [
  "target-lexicon",
 ]
 
 [[package]]
 name = "pyo3-ffi"
-version = "0.28.2"
+version = "0.28.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "491aa5fc66d8059dd44a75f4580a2962c1862a1c2945359db36f6c2818b748dc"
+checksum = "7f29e10af80b1f7ccaf7f69eace800a03ecd13e883acfacc1e5d0988605f651e"
 dependencies = [
  "libc",
  "pyo3-build-config",
@@ -318,9 +318,9 @@ dependencies = [
 
 [[package]]
 name = "pyo3-macros"
-version = "0.28.2"
+version = "0.28.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f5d671734e9d7a43449f8480f8b38115df67bef8d21f76837fa75ee7aaa5e52e"
+checksum = "df6e520eff47c45997d2fc7dd8214b25dd1310918bbb2642156ef66a67f29813"
 dependencies = [
  "proc-macro2",
  "pyo3-macros-backend",
@@ -330,9 +330,9 @@ dependencies = [
 
 [[package]]
 name = "pyo3-macros-backend"
-version = "0.28.2"
+version = "0.28.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "22faaa1ce6c430a1f71658760497291065e6450d7b5dc2bcf254d49f66ee700a"
+checksum = "c4cdc218d835738f81c2338f822078af45b4afdf8b2e33cbb5916f108b813acb"
 dependencies = [
  "heck",
  "proc-macro2",
@@ -364,9 +364,9 @@ checksum = "f8dcc9c7d52a811697d2151c701e0d08956f92b0e24136cf4cf27b57a6a0d9bf"
 
 [[package]]
 name = "rand"
-version = "0.9.2"
+version = "0.9.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6db2770f06117d490610c7488547d543617b21bfa07796d7a12f6f1bd53850d1"
+checksum = "44c5af06bb1b7d3216d91932aed5265164bf384dc89cd6ba05cf59a35f5f76ea"
 dependencies = [
  "rand_chacha 0.9.0",
  "rand_core 0.9.5",
@@ -380,7 +380,7 @@ checksum = "d2e8e8bcc7961af1fdac401278c6a831614941f6164ee3bf4ce61b7edb162207"
 dependencies = [
  "chacha20",
  "getrandom 0.4.2",
- "rand_core 0.10.0",
+ "rand_core 0.10.1",
 ]
 
 [[package]]
@@ -400,7 +400,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3e6af7f3e25ded52c41df4e0b1af2d047e45896c2f3281792ed68a1c243daedb"
 dependencies = [
  "ppv-lite86",
- "rand_core 0.10.0",
+ "rand_core 0.10.1",
 ]
 
 [[package]]
@@ -414,9 +414,9 @@ dependencies = [
 
 [[package]]
 name = "rand_core"
-version = "0.10.0"
+version = "0.10.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0c8d0fd677905edcbeedbf2edb6494d676f0e98d54d5cf9bda0b061cb8fb8aba"
+checksum = "63b8176103e19a2643978565ca18b50549f6101881c443590420e4dc998a3c69"
 
 [[package]]
 name = "rayon"
@@ -461,9 +461,9 @@ checksum = "94143f37725109f92c262ed2cf5e59bce7498c01bcc1502d7b9afe439a4e9f49"
 
 [[package]]
 name = "semver"
-version = "1.0.27"
+version = "1.0.28"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d767eb0aabc880b29956c35734170f26ed551a859dbd361d140cdbeca61ab1e2"
+checksum = "8a7852d02fc848982e0c167ef163aaff9cd91dc640ba85e263cb1ce46fae51cd"
 
 [[package]]
 name = "serde"
@@ -497,9 +497,9 @@ dependencies = [
 
 [[package]]
 name = "serde_json"
-version = "1.0.149"
+version = "1.0.150"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "83fc039473c5595ace860d8c4fafa220ff474b3fc6bfdb4293327f1a37e94d86"
+checksum = "e8014e44b4736ed0538adeecded0fce2a272f22dc9578a7eb6b2d9993c74cfb9"
 dependencies = [
  "itoa",
  "memchr",
@@ -558,8 +558,9 @@ dependencies = [
 
 [[package]]
 name = "solverforge"
-version = "0.15.0"
+version = "0.15.1"
 dependencies = [
+ "solverforge-bridge",
  "solverforge-config",
  "solverforge-core",
  "solverforge-cvrp",
@@ -569,9 +570,19 @@ dependencies = [
  "tokio",
 ]
 
+[[package]]
+name = "solverforge-bridge"
+version = "0.15.1"
+dependencies = [
+ "solverforge-config",
+ "solverforge-core",
+ "solverforge-scoring",
+ "solverforge-solver",
+]
+
 [[package]]
 name = "solverforge-config"
-version = "0.15.0"
+version = "0.15.1"
 dependencies = [
  "serde",
  "serde_yaml",
@@ -582,7 +593,7 @@ dependencies = [
 
 [[package]]
 name = "solverforge-core"
-version = "0.15.0"
+version = "0.15.1"
 dependencies = [
  "serde",
  "thiserror",
@@ -590,14 +601,14 @@ dependencies = [
 
 [[package]]
 name = "solverforge-cvrp"
-version = "0.15.0"
+version = "0.15.1"
 dependencies = [
  "solverforge-solver",
 ]
 
 [[package]]
 name = "solverforge-macros"
-version = "0.15.0"
+version = "0.15.1"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -609,7 +620,7 @@ name = "solverforge-nrp"
 version = "0.1.0"
 dependencies = [
  "pyo3",
- "rand 0.9.2",
+ "rand 0.9.4",
  "serde",
  "serde_json",
  "solverforge",
@@ -618,7 +629,7 @@ dependencies = [
 
 [[package]]
 name = "solverforge-scoring"
-version = "0.15.0"
+version = "0.15.1"
 dependencies = [
  "solverforge-core",
  "thiserror",
@@ -626,7 +637,7 @@ dependencies = [
 
 [[package]]
 name = "solverforge-solver"
-version = "0.15.0"
+version = "0.15.1"
 dependencies = [
  "rand 0.10.1",
  "rand_chacha 0.10.0",
@@ -680,9 +691,9 @@ dependencies = [
 
 [[package]]
 name = "tokio"
-version = "1.52.2"
+version = "1.52.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "110a78583f19d5cdb2c5ccf321d1290344e71313c6c37d43520d386027d18386"
+checksum = "8fc7f01b389ac15039e4dc9531aa973a135d7a4135281b12d7c1bc79fd57fffe"
 dependencies = [
  "bytes",
  "libc",
@@ -802,11 +813,11 @@ checksum = "ccf3ec651a847eb01de73ccad15eb7d99f80485de043efb2f370cd654f4ea44b"
 
 [[package]]
 name = "wasip2"
-version = "1.0.2+wasi-0.2.9"
+version = "1.0.3+wasi-0.2.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9517f9239f02c069db75e65f174b3da828fe5f5b945c4dd26bd25d89c03ebcf5"
+checksum = "20064672db26d7cdc89c7798c48a0fdfac8213434a1186e5ef29fd560ae223d6"
 dependencies = [
- "wit-bindgen",
+ "wit-bindgen 0.57.1",
 ]
 
 [[package]]
@@ -815,7 +826,7 @@ version = "0.4.0+wasi-0.3.0-rc-2026-01-06"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5428f8bf88ea5ddc08faddef2ac4a67e390b88186c703ce6dbd955e1c145aca5"
 dependencies = [
- "wit-bindgen",
+ "wit-bindgen 0.51.0",
 ]
 
 [[package]]
@@ -869,9 +880,9 @@ dependencies = [
 
 [[package]]
 name = "winnow"
-version = "1.0.2"
+version = "1.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2ee1708bef14716a11bae175f579062d4554d95be2c6829f518df847b7b3fdd0"
+checksum = "0592e1c9d151f854e6fd382574c3a0855250e1d9b2f99d9281c6e6391af352f1"
 
 [[package]]
 name = "wit-bindgen"
@@ -882,6 +893,12 @@ dependencies = [
  "wit-bindgen-rust-macro",
 ]
 
+[[package]]
+name = "wit-bindgen"
+version = "0.57.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1ebf944e87a7c253233ad6766e082e3cd714b5d03812acc24c318f549614536e"
+
 [[package]]
 name = "wit-bindgen-core"
 version = "0.51.0"
@@ -963,18 +980,18 @@ dependencies = [
 
 [[package]]
 name = "zerocopy"
-version = "0.8.42"
+version = "0.8.48"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f2578b716f8a7a858b7f02d5bd870c14bf4ddbbcf3a4c05414ba6503640505e3"
+checksum = "eed437bf9d6692032087e337407a86f04cd8d6a16a37199ed57949d415bd68e9"
 dependencies = [
  "zerocopy-derive",
 ]
 
 [[package]]
 name = "zerocopy-derive"
-version = "0.8.42"
+version = "0.8.48"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7e6cc098ea4d3bd6246687de65af3f920c430e236bee1e3bf2e441463f08a02f"
+checksum = "70e3cd084b1788766f53af483dd21f93881ff30d7320490ec3ef7526d203bad4"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/solverforge_nrp/Cargo.toml b/scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/solverforge_nrp/Cargo.toml
index cafd9d9..9682118 100644
--- a/scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/solverforge_nrp/Cargo.toml
+++ b/scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/solverforge_nrp/Cargo.toml
@@ -10,7 +10,7 @@ name = "solverforge_nrp"
 crate-type = ["cdylib"]
 
 [dependencies]
-solverforge = { version = "0.15.0", path = "../../../../../../../solverforge-node-sharing/crates/solverforge", features = ["serde"] }
+solverforge = { version = "0.15.1", path = "../../../../../../../solverforge/crates/solverforge", features = ["serde"] }
 tokio = { version = "1", features = ["sync", "rt", "time"] }
 rand = "0.9"
 pyo3 = { version = "0.28", features = ["extension-module"] }

From fb785e01d3e95d0b36bad23749e8512983ac6a3d Mon Sep 17 00:00:00 2001
From: Vittorio Distefano <info@vdistefano.studio>
Date: Thu, 28 May 2026 16:57:44 +0200
Subject: [PATCH 21/29] fix(employee-scheduling): remove OR-Tools seeded
 fallback

Remove the employee OR-Tools adapter's benchmark-owned greedy hint, hard-seed solve, AddHint calls, and fallback schedule path. OR-Tools now builds the CP-SAT model from the instance and performs one benchmark-budgeted solve without adapter-supplied incumbents.

Add a native fair-start witness for the CP-SAT model proto so successful native runs report zero solution-hint variables, zero preliminary solves, and no fallback solution. When CP-SAT finds no solution under the time limit, the wrapper records that as a solver failure rather than fabricating a feasible fallback.

Validated through make bench-employee-scheduling-quick-db and make verify-fair-start-rows RUN_ID=5b1058de-c7d1-42e7-bd28-a187f88eba3a; the 1s OR-Tools rows fail normally when CP-SAT finds no solution.
---
 .../solver/ortools/main.cc                    | 279 ++----------------
 1 file changed, 20 insertions(+), 259 deletions(-)

diff --git a/scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/ortools/main.cc b/scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/ortools/main.cc
index 8ff3688..8d71e65 100644
--- a/scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/ortools/main.cc
+++ b/scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/ortools/main.cc
@@ -1,5 +1,4 @@
 #include <algorithm>
-#include <chrono>
 #include <cmath>
 #include <cstdint>
 #include <cstdlib>
@@ -7,13 +6,11 @@
 #include <iostream>
 #include <iterator>
 #include <limits>
-#include <numeric>
 #include <optional>
 #include <set>
 #include <sstream>
 #include <stdexcept>
 #include <string>
-#include <tuple>
 #include <unordered_map>
 #include <unordered_set>
 #include <utility>
@@ -158,6 +155,18 @@ sat::LinearExpr IntSum(const std::vector<sat::IntVar>& vars) {
   return sat::LinearExpr::Sum(vars);
 }
 
+json::object FairStartWitness(const sat::CpModelProto& proto) {
+  json::object witness;
+  witness["cp_sat_solution_hint_vars"] = proto.solution_hint().vars_size();
+  witness["cp_sat_solution_hint_values"] = proto.solution_hint().values_size();
+  witness["adapter_hint_count"] = 0;
+  witness["preliminary_solve_count"] = 0;
+  witness["fallback_solution_enabled"] = false;
+  witness["preassigned_scalar_variables"] = 0;
+  witness["prefilled_list_variables"] = 0;
+  return witness;
+}
+
 void AddObjectiveTerm(sat::LinearExpr* objective, sat::BoolVar var,
                       int64_t weight) {
   *objective += sat::LinearExpr::Term(var, weight);
@@ -399,22 +408,6 @@ InstancePayload ParsePayload(const std::string& input) {
   return payload;
 }
 
-int PreviousShiftType(const std::vector<int>& assigned_shift_type_by_day,
-                      const NurseHistory& history, int global_day) {
-  if (global_day == 0) {
-    return history.last_shift_type_idx;
-  }
-  return assigned_shift_type_by_day[global_day - 1];
-}
-
-int NextShiftType(const std::vector<int>& assigned_shift_type_by_day,
-                  int global_day) {
-  if (global_day + 1 >= static_cast<int>(assigned_shift_type_by_day.size())) {
-    return -1;
-  }
-  return assigned_shift_type_by_day[global_day + 1];
-}
-
 bool IsForbiddenSuccessor(const InstancePayload& payload, int preceding,
                           int succeeding) {
   if (preceding < 0) {
@@ -427,178 +420,6 @@ bool IsForbiddenSuccessor(const InstancePayload& payload, int preceding,
   return found->second.find(succeeding) != found->second.end();
 }
 
-std::unordered_set<int64_t> BuildGreedyHint(const InstancePayload& payload) {
-  const int num_nurses = static_cast<int>(payload.nurses.size());
-  const int total_days = payload.num_weeks * 7;
-  std::vector<std::vector<int>> assigned_shift_type_by_nurse_day(
-      num_nurses, std::vector<int>(total_days, -1));
-  std::vector<int> assignment_count_by_nurse(num_nurses, 0);
-  std::unordered_set<int64_t> hint;
-
-  std::vector<int> shift_indices(payload.shifts.size());
-  std::iota(shift_indices.begin(), shift_indices.end(), 0);
-  std::sort(shift_indices.begin(), shift_indices.end(),
-            [&payload](int left_idx, int right_idx) {
-              const Shift& left = payload.shifts[left_idx];
-              const Shift& right = payload.shifts[right_idx];
-              return std::make_tuple(left.week, left.day, !left.is_minimum,
-                                     left.shift_type_idx, left.skill_idx,
-                                     left_idx) <
-                     std::make_tuple(right.week, right.day, !right.is_minimum,
-                                     right.shift_type_idx, right.skill_idx,
-                                     right_idx);
-            });
-
-  for (int shift_idx : shift_indices) {
-    const Shift& shift = payload.shifts[shift_idx];
-    if (!shift.is_minimum) {
-      continue;
-    }
-    const int global_day = GlobalDay(shift);
-    std::vector<int> candidates;
-    for (int nurse_idx = 0; nurse_idx < num_nurses; ++nurse_idx) {
-      const Nurse& nurse = payload.nurses[nurse_idx];
-      if (nurse.skills.find(shift.skill_idx) == nurse.skills.end()) {
-        continue;
-      }
-      if (assigned_shift_type_by_nurse_day[nurse_idx][global_day] >= 0) {
-        continue;
-      }
-      const int previous_shift_type =
-          PreviousShiftType(assigned_shift_type_by_nurse_day[nurse_idx],
-                            payload.histories[nurse_idx], global_day);
-      if (IsForbiddenSuccessor(payload, previous_shift_type,
-                               shift.shift_type_idx)) {
-        continue;
-      }
-      const int next_shift_type =
-          NextShiftType(assigned_shift_type_by_nurse_day[nurse_idx],
-                        global_day);
-      if (IsForbiddenSuccessor(payload, shift.shift_type_idx,
-                               next_shift_type)) {
-        continue;
-      }
-      candidates.push_back(nurse_idx);
-    }
-    if (candidates.empty()) {
-      continue;
-    }
-    const int nurse_idx = *std::min_element(
-        candidates.begin(), candidates.end(), [&](int left, int right) {
-          return std::tie(assignment_count_by_nurse[left], left) <
-                 std::tie(assignment_count_by_nurse[right], right);
-        });
-    assigned_shift_type_by_nurse_day[nurse_idx][global_day] =
-        shift.shift_type_idx;
-    assignment_count_by_nurse[nurse_idx] += 1;
-    hint.insert(Key(shift_idx, nurse_idx, num_nurses));
-  }
-
-  return hint;
-}
-
-std::unordered_set<int64_t> SolveHardSeed(const InstancePayload& payload,
-                                          double time_limit) {
-  sat::CpModelBuilder model;
-  const int num_nurses = static_cast<int>(payload.nurses.size());
-  const int total_days = payload.num_weeks * 7;
-  std::vector<AssignmentVar> assignment_vars;
-  std::vector<std::vector<std::vector<sat::BoolVar>>> vars_by_nurse_day(
-      num_nurses, std::vector<std::vector<sat::BoolVar>>(total_days));
-  std::vector<std::vector<std::vector<std::vector<sat::BoolVar>>>>
-      vars_by_nurse_day_shift_type(
-          num_nurses,
-          std::vector<std::vector<std::vector<sat::BoolVar>>>(
-              total_days,
-              std::vector<std::vector<sat::BoolVar>>(
-                  payload.shift_types.size())));
-
-  for (int shift_idx = 0; shift_idx < static_cast<int>(payload.shifts.size());
-       ++shift_idx) {
-    const Shift& shift = payload.shifts[shift_idx];
-    const int global_day = GlobalDay(shift);
-    std::vector<sat::BoolVar> candidates;
-    for (int nurse_idx = 0; nurse_idx < num_nurses; ++nurse_idx) {
-      const Nurse& nurse = payload.nurses[nurse_idx];
-      if (nurse.skills.find(shift.skill_idx) == nurse.skills.end()) {
-        continue;
-      }
-      const int history_last_shift =
-          payload.histories[nurse_idx].last_shift_type_idx;
-      if (global_day == 0 &&
-          IsForbiddenSuccessor(payload, history_last_shift,
-                               shift.shift_type_idx)) {
-        continue;
-      }
-      sat::BoolVar var =
-          model.NewBoolVar().WithName("seed_s" + std::to_string(shift_idx) +
-                                      "_n" + std::to_string(nurse_idx));
-      candidates.push_back(var);
-      assignment_vars.push_back({shift_idx, nurse_idx, var});
-      vars_by_nurse_day[nurse_idx][global_day].push_back(var);
-      vars_by_nurse_day_shift_type[nurse_idx][global_day]
-                                  [shift.shift_type_idx]
-                                      .push_back(var);
-    }
-
-    if (shift.is_minimum) {
-      model.AddEquality(BoolSum(candidates), 1);
-    } else {
-      model.AddEquality(BoolSum(candidates), 0);
-    }
-  }
-
-  for (int nurse_idx = 0; nurse_idx < num_nurses; ++nurse_idx) {
-    for (int day = 0; day < total_days; ++day) {
-      model.AddLessOrEqual(BoolSum(vars_by_nurse_day[nurse_idx][day]), 1);
-    }
-    for (int day = 0; day < total_days - 1; ++day) {
-      for (const auto& [preceding, successors] : payload.forbidden_successors) {
-        for (int succeeding : successors) {
-          for (sat::BoolVar left :
-               vars_by_nurse_day_shift_type[nurse_idx][day][preceding]) {
-            for (sat::BoolVar right :
-                 vars_by_nurse_day_shift_type[nurse_idx][day + 1][succeeding]) {
-              model.AddLessOrEqual(left + right, 1);
-            }
-          }
-        }
-      }
-    }
-  }
-
-  const std::unordered_set<int64_t> greedy_hint = BuildGreedyHint(payload);
-  for (const AssignmentVar& assignment_var : assignment_vars) {
-    model.AddHint(assignment_var.var,
-                  greedy_hint.find(Key(assignment_var.shift_idx,
-                                       assignment_var.nurse_idx,
-                                       num_nurses)) != greedy_hint.end());
-  }
-
-  sat::Model solver_model;
-  sat::SatParameters parameters;
-  parameters.set_max_time_in_seconds(time_limit);
-  parameters.set_num_search_workers(1);
-  parameters.set_random_seed(1);
-  parameters.set_log_search_progress(false);
-  solver_model.Add(sat::NewSatParameters(parameters));
-  const sat::CpSolverResponse response =
-      sat::SolveCpModel(model.Build(), &solver_model);
-  if (response.status() != sat::CpSolverStatus::OPTIMAL &&
-      response.status() != sat::CpSolverStatus::FEASIBLE) {
-    return {};
-  }
-
-  std::unordered_set<int64_t> assignment_keys;
-  for (const AssignmentVar& assignment_var : assignment_vars) {
-    if (sat::SolutionBooleanValue(response, assignment_var.var)) {
-      assignment_keys.insert(Key(assignment_var.shift_idx,
-                                 assignment_var.nurse_idx, num_nurses));
-    }
-  }
-  return assignment_keys;
-}
-
 json::object SolutionJson(const InstancePayload& payload,
                           const std::unordered_set<int64_t>& assignment_keys,
                           std::optional<double> objective) {
@@ -634,27 +455,12 @@ json::object SolutionJson(const InstancePayload& payload,
 
 std::optional<json::object> Solve(const InstancePayload& payload,
                                   double time_limit) {
-  const double seed_time_limit =
-      std::min(std::min(5.0, std::max(1.0, time_limit * 0.25)), time_limit);
-  const auto seed_start = std::chrono::steady_clock::now();
-  const std::unordered_set<int64_t> hard_seed =
-      SolveHardSeed(payload, seed_time_limit);
-  const double seed_elapsed =
-      std::chrono::duration<double>(std::chrono::steady_clock::now() -
-                                    seed_start)
-          .count();
-  const double remaining_time = time_limit - seed_elapsed;
-  if (!hard_seed.empty() && remaining_time <= 0.1) {
-    return SolutionJson(payload, hard_seed, std::nullopt);
-  }
-
   sat::CpModelBuilder model;
   const int num_nurses = static_cast<int>(payload.nurses.size());
   const int total_days = payload.num_weeks * 7;
 
   sat::LinearExpr objective(0);
   std::vector<AssignmentVar> assignment_vars;
-  std::vector<std::pair<int, sat::BoolVar>> unassigned_vars;
   std::vector<std::vector<sat::BoolVar>> vars_by_nurse(num_nurses);
   std::vector<std::vector<std::vector<sat::BoolVar>>> vars_by_nurse_day(
       num_nurses, std::vector<std::vector<sat::BoolVar>>(total_days));
@@ -714,7 +520,6 @@ std::optional<json::object> Solve(const InstancePayload& payload,
       sat::BoolVar unassigned =
           model.NewBoolVar().WithName("optional_unassigned_s" +
                                       std::to_string(shift_idx));
-      unassigned_vars.push_back({shift_idx, unassigned});
       model.AddEquality(unassigned + BoolSum(candidates), 1);
       AddObjectiveTerm(&objective, unassigned, 30);
     }
@@ -862,68 +667,21 @@ std::optional<json::object> Solve(const InstancePayload& payload,
     AddObjectiveTerm(&objective, over_weekends, 30);
   }
 
-  const std::unordered_set<int64_t> hint =
-      !hard_seed.empty() ? hard_seed : BuildGreedyHint(payload);
-  for (const AssignmentVar& assignment_var : assignment_vars) {
-    model.AddHint(assignment_var.var,
-                  hint.find(Key(assignment_var.shift_idx,
-                                assignment_var.nurse_idx, num_nurses)) !=
-                      hint.end());
-  }
-  std::unordered_set<int> hinted_shift_indices;
-  for (int64_t key : hint) {
-    hinted_shift_indices.insert(KeyShift(key, num_nurses));
-  }
-  for (const auto& [shift_idx, var] : unassigned_vars) {
-    model.AddHint(var, hinted_shift_indices.find(shift_idx) ==
-                           hinted_shift_indices.end());
-  }
-  for (int nurse_idx = 0; nurse_idx < num_nurses; ++nurse_idx) {
-    for (int day = 0; day < total_days; ++day) {
-      bool works = false;
-      for (int64_t key : hint) {
-        if (KeyNurse(key, num_nurses) == nurse_idx &&
-            GlobalDay(payload.shifts[KeyShift(key, num_nurses)]) == day) {
-          works = true;
-          break;
-        }
-      }
-      model.AddHint(work_by_nurse_day[nurse_idx][day], works);
-      for (int shift_type_idx = 0;
-           shift_type_idx < static_cast<int>(payload.shift_types.size());
-           ++shift_type_idx) {
-        bool works_type = false;
-        for (int64_t key : hint) {
-          const Shift& shift = payload.shifts[KeyShift(key, num_nurses)];
-          if (KeyNurse(key, num_nurses) == nurse_idx &&
-              GlobalDay(shift) == day &&
-              shift.shift_type_idx == shift_type_idx) {
-            works_type = true;
-            break;
-          }
-        }
-        model.AddHint(shift_type_by_nurse_day[nurse_idx][day][shift_type_idx],
-                      works_type);
-      }
-    }
-  }
-
   model.Minimize(objective);
 
   sat::Model solver_model;
   sat::SatParameters parameters;
-  parameters.set_max_time_in_seconds(std::max(0.1, remaining_time));
+  parameters.set_max_time_in_seconds(std::max(0.1, time_limit));
   parameters.set_num_search_workers(1);
   parameters.set_random_seed(1);
   parameters.set_log_search_progress(false);
   solver_model.Add(sat::NewSatParameters(parameters));
+  const sat::CpModelProto proto = model.Build();
+  const json::object fair_start_witness = FairStartWitness(proto);
   const sat::CpSolverResponse response =
-      sat::SolveCpModel(model.Build(), &solver_model);
+      sat::SolveCpModel(proto, &solver_model);
   if (response.status() != sat::CpSolverStatus::OPTIMAL &&
       response.status() != sat::CpSolverStatus::FEASIBLE) {
-    if (!hard_seed.empty()) {
-      return SolutionJson(payload, hard_seed, std::nullopt);
-    }
     return std::nullopt;
   }
 
@@ -934,7 +692,10 @@ std::optional<json::object> Solve(const InstancePayload& payload,
                                  assignment_var.nurse_idx, num_nurses));
     }
   }
-  return SolutionJson(payload, assignment_keys, response.objective_value());
+  json::object solution =
+      SolutionJson(payload, assignment_keys, response.objective_value());
+  solution["fair_start_witness"] = fair_start_witness;
+  return solution;
 }
 
 }  // namespace

From a66d7167709338601b580738350f9e33e3ab329a Mon Sep 17 00:00:00 2001
From: Vittorio Distefano <info@vdistefano.studio>
Date: Thu, 28 May 2026 16:57:55 +0200
Subject: [PATCH 22/29] feat(job-shop): model schedules as machine sequences

Replace the benchmark-owned dispatch-start initialization in the JSSP SolverForge adapter with empty per-machine operation lists. SolverForge now constructs and searches machine sequences with fixed machine ownership, and schedule starts are derived during evaluation from job precedence plus machine order.

Move the Timefold JSSP adapter to the same list-planning shape by introducing MachineSequence, replacing the constraint-stream provider with an easy score calculator backed by a schedule evaluator, and leaving machine lists empty at solve start. The audit note records why scalar precomputed starts were not a fair or useful search surface.

Validated with make validate-job-shop-scheduling, cargo fmt --all --check, cargo check --locked for solverforge_jssp, make bench-job-shop-scheduling-quick-db, and make verify-fair-start-rows RUN_ID=32fe5d16-9ad1-4981-8ead-ae5710c4f524.
---
 JOB_SHOP_SOLVERFORGE_AUDIT.md                 | 355 ++++++++++++++++++
 .../solver/solverforge_jssp/Cargo.lock        |  39 +-
 .../solver/solverforge_jssp/Cargo.toml        |   4 +-
 .../solver/solverforge_jssp/solver.toml       |  42 ++-
 .../solverforge_jssp/src/constraints.rs       | 187 ++++-----
 .../solver/solverforge_jssp/src/domain.rs     | 149 +++++++-
 .../solver/solverforge_jssp/src/lib.rs        |  85 ++---
 .../jssp/JsspConstraintProvider.java          |  70 ----
 .../jssp/JsspEasyScoreCalculator.java         |  14 +
 .../jssp/JsspScheduleEvaluator.java           | 159 ++++++++
 .../java/com/solverforgebench/jssp/Main.java  |  91 +++--
 .../jssp/domain/JsspSchedule.java             |  32 +-
 .../jssp/domain/MachineSequence.java          |  50 +++
 .../jssp/domain/OperationAssignment.java      |  43 ++-
 14 files changed, 1013 insertions(+), 307 deletions(-)
 create mode 100644 JOB_SHOP_SOLVERFORGE_AUDIT.md
 delete mode 100644 scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold/src/main/java/com/solverforgebench/jssp/JsspConstraintProvider.java
 create mode 100644 scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold/src/main/java/com/solverforgebench/jssp/JsspEasyScoreCalculator.java
 create mode 100644 scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold/src/main/java/com/solverforgebench/jssp/JsspScheduleEvaluator.java
 create mode 100644 scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold/src/main/java/com/solverforgebench/jssp/domain/MachineSequence.java

diff --git a/JOB_SHOP_SOLVERFORGE_AUDIT.md b/JOB_SHOP_SOLVERFORGE_AUDIT.md
new file mode 100644
index 0000000..e421808
--- /dev/null
+++ b/JOB_SHOP_SOLVERFORGE_AUDIT.md
@@ -0,0 +1,355 @@
+# Job-Shop Scheduling Benchmark Audit
+
+Date: 2026-05-23
+
+Run ID: `c6815384-80b2-4339-b32b-e5819a8c9595`
+
+CSV: `scalar-variable/job-shop-scheduling/data/benchmark_job_shop_scheduling_20260523_100602_724853.csv`
+
+Log: `logs/job-shop-scheduling_20260523_100602_724853/job-shop-scheduling_20260523_100602_724853.log`
+
+## Executive Finding
+
+The previous "full" job-shop run was short because the benchmark manifest's
+`canonical` group only covered three instances. The harness was not truncating
+the run. The current dataset is the full classic JSPLIB corpus from
+`tamy0612/JSPLIB`: 162 instances across `abz`, `ft`, `la`, `orb`, `swv`, `ta`,
+and `yn`.
+
+The completed full run wrote all expected rows:
+
+```text
+162 instances * 3 solvers * 3 time limits = 1458 rows
+```
+
+SolverForge is losing because the current JSSP adapter models each operation's
+absolute start time as an independent scalar variable over `0..horizon`, seeds
+every operation with a greedy dispatch start, and then relies on default scalar
+change/swap local search. That search shape cannot perform the coordinated
+machine-sequence reorderings and left-shifts that JSSP needs.
+
+This is not a parser, dataset, timing, database, watchdog, or feasibility
+problem. SolverForge returned feasible solutions on all 486 SolverForge rows.
+The quality problem is that those solutions are almost always exactly the
+initial dispatch schedule.
+
+## Canonical Dataset
+
+Current local proof:
+
+```text
+local .txt files: 162
+manifest instances: 162
+manifest groups.canonical: 162
+manifest groups.quick: 2
+manifest unknown optimum count: 59
+families: abz, ft, la, orb, swv, ta, yn
+```
+
+The live upstream metadata at
+`https://raw.githubusercontent.com/tamy0612/JSPLIB/master/instances.json` was
+checked during the audit and contained 162 unique names in the same seven
+families. The local manifest's `instances` list and `groups.canonical` list are
+identical.
+
+The old completed DB run `ee679f39-4df3-4ed0-acec-bfa1e019540e` had 27 rows:
+
+```text
+3 instances * 3 solvers * 3 time limits = 27 rows
+```
+
+That explains the short benchmark. It was the old canonical group, not the
+shared runner.
+
+## Completed Full Run
+
+The clean run was started after aborting a contaminated attempt that was sharing
+CPU 0 with CVRP and employee-scheduling runs. The completed run used:
+
+```text
+benchmark: job-shop-scheduling
+run_kind: candidate
+dataset_set: canonical
+solvers: solverforge, timefold, ortools
+time_limits: 1, 10, 60 seconds
+created_at: 2026-05-23 10:06:02.836118+02
+completed_at: 2026-05-23 19:04:22.334331+02
+elapsed: 08:58:19.498213
+status: completed
+result_count: 1458
+```
+
+Health:
+
+| Solver | Rows | Feasible | Infeasible | Watchdog kills | Process errors |
+|---|---:|---:|---:|---:|---:|
+| OR-Tools | 486 | 486 | 0 | 0 | 0 |
+| SolverForge | 486 | 486 | 0 | 0 | 0 |
+| Timefold | 486 | 485 | 1 | 0 | 0 |
+
+The single invalid row was Timefold on `orb07` at 60 seconds:
+
+```text
+Machine overlap on 0: (8, 9) and (9, 9)
+```
+
+## Solver Ranking
+
+Known optimum/best instances: 103 instances. Gap is `(cost - known_best) /
+known_best`; `0.0830` means 8.30%.
+
+| Time limit | Solver | Known rows | Avg gap | Median gap | Max gap |
+|---:|---|---:|---:|---:|---:|
+| 1s | OR-Tools | 103 | 0.0830 | 0.0680 | 0.2677 |
+| 1s | Timefold | 103 | 5.8179 | 5.7063 | 13.8342 |
+| 1s | SolverForge | 103 | 5.9141 | 5.7389 | 13.8342 |
+| 10s | OR-Tools | 103 | 0.0564 | 0.0196 | 0.2583 |
+| 10s | Timefold | 103 | 4.3562 | 3.8256 | 13.7916 |
+| 10s | SolverForge | 103 | 5.9141 | 5.7389 | 13.8342 |
+| 60s | OR-Tools | 103 | 0.0377 | 0.0000 | 0.2036 |
+| 60s | Timefold | 102 | 2.8557 | 1.1766 | 12.9593 |
+| 60s | SolverForge | 103 | 5.8996 | 5.7389 | 13.8342 |
+
+Overall known-best ranking:
+
+| Solver | Known rows | Avg gap | Median gap |
+|---|---:|---:|---:|
+| OR-Tools | 309 | 0.0591 | 0.0222 |
+| Timefold | 308 | 4.3481 | 3.0963 |
+| SolverForge | 309 | 5.9092 | 5.7389 |
+
+Best-feasible wins/ties by instance and time limit:
+
+| Solver | Rows | Wins or ties | Avg rank |
+|---|---:|---:|---:|
+| OR-Tools | 486 | 486 | 1.000 |
+| Timefold | 485 | 1 | 1.998 |
+| SolverForge | 486 | 0 | 2.722 |
+
+Unknown-optimum instances with lower bounds available: 49 instances. Gap is
+relative to the lower bound.
+
+| Time limit | Solver | Rows | Avg gap to LB | Median gap to LB |
+|---:|---|---:|---:|---:|
+| 1s | OR-Tools | 49 | 0.2470 | 0.2437 |
+| 1s | Timefold | 49 | 8.5015 | 9.2548 |
+| 1s | SolverForge | 49 | 8.5015 | 9.2548 |
+| 10s | OR-Tools | 49 | 0.1738 | 0.1663 |
+| 10s | Timefold | 49 | 7.7197 | 8.5173 |
+| 10s | SolverForge | 49 | 8.5015 | 9.2548 |
+| 60s | OR-Tools | 49 | 0.1334 | 0.1328 |
+| 60s | Timefold | 49 | 4.8322 | 4.9428 |
+| 60s | SolverForge | 49 | 8.5015 | 9.2548 |
+
+## Why SolverForge Is Losing
+
+### 1. The adapter preassigns the entire solution
+
+`scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp/src/lib.rs`
+computes a greedy dispatch schedule and assigns every operation's start before
+the SolverForge solve begins:
+
+```text
+dispatch_starts: lines 49-63
+build_plan: lines 65-93
+JsspOperation.start = Some(starts[id]): line 83
+start_values = 0..=horizon: line 88
+```
+
+`domain.rs` declares `start` as the planning variable:
+
+```text
+#[planning_variable(value_range_provider = "start_values", allows_unassigned = true)]
+pub start: Option<usize>
+```
+
+Because every `start` is already `Some`, construction has no scalar work to do.
+This is confirmed by SolverForge core behavior:
+
+```text
+../solverforge/crates/solverforge-solver/src/descriptor/bindings/lookup.rs lines 76-113
+../solverforge/crates/solverforge-solver/src/descriptor/construction/placer.rs lines 290-298
+```
+
+Both skip scalar variables that already have a value.
+
+### 2. The model has the right hard constraints but the wrong search shape
+
+The SolverForge constraints match job-shop feasibility and makespan scoring:
+
+```text
+assignedStart
+jobPrecedence
+machineNoOverlap
+makespan
+```
+
+They are in
+`scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp/src/constraints.rs`
+lines 8-51.
+
+The issue is the neighborhood. The solver configuration is just:
+
+```toml
+[[phases]]
+type = "construction_heuristic"
+construction_heuristic_type = "first_fit"
+entity_class = "JsspOperation"
+variable_name = "start"
+
+[[phases]]
+type = "local_search"
+```
+
+With this scalar-only model, SolverForge defaults to scalar change/swap moves:
+
+```text
+default scalar change/swap: ../solverforge/.../defaults.rs lines 35-50
+scalar selector append: ../solverforge/.../defaults.rs lines 182-194
+scalar-only acceptor: ../solverforge/.../defaults.rs lines 225-254
+scalar-only forager limit: ../solverforge/.../defaults.rs lines 257-276
+AcceptedCountForager(1): ../solverforge/.../phase/localsearch/forager.rs lines 63-68
+```
+
+That means local search explores one absolute start-time change or one start
+swap at a time over very large domains. It is not doing machine-sequence moves,
+block moves, critical-path moves, or a coordinated repair/left-shift move.
+
+### 3. Dispatch comparison proves SolverForge barely moves
+
+Comparing each returned cost to the greedy dispatch makespan:
+
+| Solver | Time | Rows | Same as dispatch | Improved | Worse |
+|---|---:|---:|---:|---:|---:|
+| SolverForge | 1s | 162 | 162 | 0 | 0 |
+| SolverForge | 10s | 162 | 162 | 0 | 0 |
+| SolverForge | 60s | 162 | 161 | 1 | 0 |
+| Timefold | 1s | 162 | 118 | 44 | 0 |
+| Timefold | 10s | 162 | 15 | 147 | 0 |
+| Timefold | 60s | 161 | 1 | 160 | 0 |
+| OR-Tools | 1s | 162 | 0 | 162 | 0 |
+| OR-Tools | 10s | 162 | 0 | 162 | 0 |
+| OR-Tools | 60s | 162 | 0 | 162 | 0 |
+
+SolverForge's only improvement over dispatch was `ft06` at 60 seconds:
+
+```text
+dispatch makespan: 152
+SolverForge 60s cost: 70
+known best: 55
+```
+
+Every other SolverForge row was exactly the greedy dispatch schedule.
+
+### 4. The immediate neighborhood has no improving move
+
+A direct neighborhood probe from the dispatch solution found zero improving
+feasible one-start or start-swap neighbors on representative instances:
+
+| Instance | Ops | Horizon | Dispatch | Known best | One-start improving | Start-swap improving |
+|---|---:|---:|---:|---:|---:|---:|
+| ft06 | 36 | 197 | 152 | 55 | 0 / 7,092 | 0 / 626 |
+| la01 | 50 | 2,849 | 2,272 | 666 | 0 / 142,450 | 0 / 1,216 |
+| abz5 | 100 | 7,773 | 6,446 | 1,234 | 0 / 777,300 | 0 / 4,938 |
+| abz6 | 100 | 5,946 | 4,526 | 943 | 0 / 594,600 | 0 / 4,936 |
+
+This is the exact local-search failure mode: a good JSSP move usually changes
+relative machine order and then left-shifts several operations. A single scalar
+start edit usually either violates precedence/no-overlap or does not reduce the
+makespan. A start swap is similarly ineffective because the values are absolute
+times, not sequence positions.
+
+### 5. Timefold and OR-Tools confirm the diagnosis
+
+Timefold is intentionally comparable: its adapter also creates a scalar
+start-time model and dispatch initialization:
+
+```text
+scalar start range and dispatch starts:
+scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold/src/main/java/com/solverforgebench/jssp/Main.java lines 79-98
+
+solver config:
+lines 99-106
+```
+
+Timefold still improves much more than SolverForge, so the issue is not the
+loader or the basic feasibility constraints. It is SolverForge's current
+default scalar search behavior on this model.
+
+OR-Tools uses a CP-SAT interval model with `NoOverlap` and makespan minimization:
+
+```text
+interval variables: scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/ortools/main.cc lines 92-118
+job precedence: lines 120-128
+machine no-overlap: lines 131-133
+makespan objective: lines 135-138
+```
+
+That is the right representation for this benchmark. It exposes the disjunctive
+scheduling structure directly, which is why OR-Tools dominates this run.
+
+## Scale of the Search Space
+
+Canonical JSPLIB instance scale:
+
+```text
+operations min/median/max: 36 / 300 / 2000
+horizon min/median/max: 197 / 15078.5 / 101716
+scalar change candidates min/median/max: 7,128 / 4,624,200 / 203,434,000
+start swap candidates min/median/max: 630 / 44,850 / 1,999,000
+```
+
+Largest scalar-change cases:
+
+```text
+ta77 ops=2000 horizon=101716 scalar_change=203434000 swap=1999000
+ta71 ops=2000 horizon=100891 scalar_change=201784000 swap=1999000
+ta73 ops=2000 horizon=100622 scalar_change=201246000 swap=1999000
+ta76 ops=2000 horizon=100371 scalar_change=200744000 swap=1999000
+ta74 ops=2000 horizon=100049 scalar_change=200100000 swap=1999000
+```
+
+This makes the scalar absolute-time representation a poor benchmark for
+SolverForge's current defaults.
+
+## Verification Commands
+
+Completed successfully:
+
+```bash
+make validate-job-shop-scheduling
+make bench-job-shop-scheduling-db BENCH_ARGS="--no-show-solver-output --no-capture-solver-output"
+make normalize-results INPUT=scalar-variable/job-shop-scheduling/data/benchmark_job_shop_scheduling_20260523_100602_724853.csv OUTPUT=/tmp/jobshop-full-normalized.csv
+.venv/bin/python3 -m compileall -q src list-variable/cvrp/src scalar-variable/employee-scheduling/src scalar-variable/job-shop-scheduling/src scripts
+.venv/bin/python3 - <<'PY'
+import tomllib
+from pathlib import Path
+for name in ['benchmark.example.toml','benchmark.nightly.example.toml']:
+    tomllib.loads(Path(name).read_text())
+PY
+```
+
+Validation output:
+
+```text
+validated 162 instances
+```
+
+Normalization output:
+
+```text
+/tmp/jobshop-full-normalized.csv has 1459 lines
+1458 data rows + header
+```
+
+## Conclusion
+
+The canonical dataset and full run are now real. SolverForge is losing with
+absolute clarity because this adapter asks it to solve JSSP through independent
+absolute start-time scalar moves from a fully assigned greedy dispatch schedule.
+The default scalar neighborhood almost never escapes that dispatch solution.
+
+The next real fix is not another benchmark-run tweak. It is a modeling/search
+change: represent machine sequencing directly, or add an upstream SolverForge
+move/repair family that can reorder machine blocks and left-shift affected
+operations as a coordinated move.
diff --git a/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp/Cargo.lock b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp/Cargo.lock
index 92935e2..6ccc224 100644
--- a/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp/Cargo.lock
+++ b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp/Cargo.lock
@@ -73,9 +73,9 @@ checksum = "d0a5c400df2834b80a4c3327b3aad3a4c4cd4de0629063962b03235697506a28"
 
 [[package]]
 name = "either"
-version = "1.15.0"
+version = "1.16.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "48c757948c5ede0e46177b7add2e67155f70e33c07fea8284df6576da70b3719"
+checksum = "91622ff5e7162018101f2fea40d6ebf4a78bbe5a49736a2020649edf9693679e"
 
 [[package]]
 name = "equivalent"
@@ -181,9 +181,9 @@ dependencies = [
 
 [[package]]
 name = "log"
-version = "0.4.29"
+version = "0.4.30"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5e5032e24019045c762d3c0f28f5b6b8bbf38563a65908389bf7978758920897"
+checksum = "616ec5685824bcc94416c6d4a7a446eea774a31efd7062c8480ba6fd06d7a6e5"
 
 [[package]]
 name = "memchr"
@@ -450,9 +450,9 @@ dependencies = [
 
 [[package]]
 name = "serde_json"
-version = "1.0.149"
+version = "1.0.150"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "83fc039473c5595ace860d8c4fafa220ff474b3fc6bfdb4293327f1a37e94d86"
+checksum = "e8014e44b4736ed0538adeecded0fce2a272f22dc9578a7eb6b2d9993c74cfb9"
 dependencies = [
  "itoa",
  "memchr",
@@ -511,8 +511,9 @@ dependencies = [
 
 [[package]]
 name = "solverforge"
-version = "0.14.1"
+version = "0.15.1"
 dependencies = [
+ "solverforge-bridge",
  "solverforge-config",
  "solverforge-core",
  "solverforge-cvrp",
@@ -522,9 +523,19 @@ dependencies = [
  "tokio",
 ]
 
+[[package]]
+name = "solverforge-bridge"
+version = "0.15.1"
+dependencies = [
+ "solverforge-config",
+ "solverforge-core",
+ "solverforge-scoring",
+ "solverforge-solver",
+]
+
 [[package]]
 name = "solverforge-config"
-version = "0.14.1"
+version = "0.15.1"
 dependencies = [
  "serde",
  "serde_yaml",
@@ -535,14 +546,14 @@ dependencies = [
 
 [[package]]
 name = "solverforge-core"
-version = "0.14.1"
+version = "0.15.1"
 dependencies = [
  "thiserror",
 ]
 
 [[package]]
 name = "solverforge-cvrp"
-version = "0.14.1"
+version = "0.15.1"
 dependencies = [
  "solverforge-solver",
 ]
@@ -555,11 +566,13 @@ dependencies = [
  "serde",
  "serde_json",
  "solverforge",
+ "solverforge-core",
+ "solverforge-scoring",
 ]
 
 [[package]]
 name = "solverforge-macros"
-version = "0.14.1"
+version = "0.15.1"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -568,7 +581,7 @@ dependencies = [
 
 [[package]]
 name = "solverforge-scoring"
-version = "0.14.1"
+version = "0.15.1"
 dependencies = [
  "solverforge-core",
  "thiserror",
@@ -576,7 +589,7 @@ dependencies = [
 
 [[package]]
 name = "solverforge-solver"
-version = "0.14.1"
+version = "0.15.1"
 dependencies = [
  "rand",
  "rand_chacha",
diff --git a/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp/Cargo.toml b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp/Cargo.toml
index 67406eb..b414b96 100644
--- a/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp/Cargo.toml
+++ b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp/Cargo.toml
@@ -10,7 +10,9 @@ name = "solverforge_jssp"
 crate-type = ["cdylib"]
 
 [dependencies]
-solverforge = { version = "0.14.1", path = "../../../../../../../solverforge/crates/solverforge" }
+solverforge = { version = "0.15.1", path = "../../../../../../../solverforge/crates/solverforge" }
+solverforge-core = { version = "0.15.1", path = "../../../../../../../solverforge/crates/solverforge-core" }
+solverforge-scoring = { version = "0.15.1", path = "../../../../../../../solverforge/crates/solverforge-scoring" }
 pyo3 = { version = "0.28", features = ["extension-module"] }
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
diff --git a/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp/solver.toml b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp/solver.toml
index 454d593..9b9c988 100644
--- a/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp/solver.toml
+++ b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp/solver.toml
@@ -1,8 +1,44 @@
+random_seed = 1
+
 [[phases]]
 type = "construction_heuristic"
-construction_heuristic_type = "first_fit"
-entity_class = "JsspOperation"
-variable_name = "start"
+construction_heuristic_type = "list_regret_insertion"
+entity_class = "MachineSequence"
+variable_name = "operations"
 
 [[phases]]
 type = "local_search"
+
+[phases.acceptor]
+type = "late_acceptance"
+late_acceptance_size = 200
+
+[phases.forager]
+type = "accepted_count"
+limit = 4
+
+[phases.move_selector]
+type = "union_move_selector"
+selection_order = "round_robin"
+
+[[phases.move_selector.selectors]]
+type = "list_change_move_selector"
+entity_class = "MachineSequence"
+variable_name = "operations"
+
+[[phases.move_selector.selectors]]
+type = "list_swap_move_selector"
+entity_class = "MachineSequence"
+variable_name = "operations"
+
+[[phases.move_selector.selectors]]
+type = "sublist_change_move_selector"
+min_sublist_size = 1
+max_sublist_size = 3
+entity_class = "MachineSequence"
+variable_name = "operations"
+
+[[phases.move_selector.selectors]]
+type = "list_reverse_move_selector"
+entity_class = "MachineSequence"
+variable_name = "operations"
diff --git a/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp/src/constraints.rs b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp/src/constraints.rs
index ddabfb1..26407d6 100644
--- a/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp/src/constraints.rs
+++ b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp/src/constraints.rs
@@ -1,140 +1,97 @@
-use std::collections::BTreeMap;
-
 use solverforge::prelude::*;
-use solverforge::stream::collector::{Accumulator, Collector};
+use solverforge_core::ConstraintRef;
+use solverforge_scoring::{ConstraintAnalysis, ConstraintResult};
 
-use crate::domain::{JsspOperation, JsspPlan};
+use crate::domain::JsspPlan;
 
 pub fn define_constraints() -> impl ConstraintSet<JsspPlan, HardSoftScore> {
-    let assigned_start = ConstraintFactory::<JsspPlan, HardSoftScore>::new()
-        .for_each(JsspPlan::operations())
-        .unassigned()
-        .penalize(HardSoftScore::ONE_HARD)
-        .named("assignedStart");
-
-    let job_precedence = ConstraintFactory::<JsspPlan, HardSoftScore>::new()
-        .for_each(JsspPlan::operations())
-        .join((
-            ConstraintFactory::<JsspPlan, HardSoftScore>::new().for_each(JsspPlan::operations()),
-            |left: &JsspOperation, right: &JsspOperation| {
-                left.job_id == right.job_id
-                    && left.op_index + 1 == right.op_index
-                    && left.start.is_some()
-                    && right.start.is_some()
-            },
-        ))
-        .penalize(precedence_penalty as fn(&JsspOperation, &JsspOperation) -> HardSoftScore)
-        .named("jobPrecedence");
-
-    let machine_no_overlap = ConstraintFactory::<JsspPlan, HardSoftScore>::new()
-        .for_each(JsspPlan::operations())
-        .join((
-            ConstraintFactory::<JsspPlan, HardSoftScore>::new().for_each(JsspPlan::operations()),
-            |left: &JsspOperation, right: &JsspOperation| {
-                left.id < right.id
-                    && left.machine_id == right.machine_id
-                    && left.start.is_some()
-                    && right.start.is_some()
-                    && overlaps(left, right)
-            },
-        ))
-        .penalize(overlap_penalty as fn(&JsspOperation, &JsspOperation) -> HardSoftScore)
-        .named("machineNoOverlap");
-
-    let makespan = ConstraintFactory::<JsspPlan, HardSoftScore>::new()
-        .for_each(JsspPlan::operations())
-        .filter(|operation: &JsspOperation| operation.start.is_some())
-        .group_by(|_operation: &JsspOperation| 0usize, MaxEndCollector)
-        .penalize(|_group: &usize, makespan: &usize| HardSoftScore::of_soft(*makespan as i64))
-        .named("makespan");
-
-    (assigned_start, job_precedence, machine_no_overlap, makespan)
+    (JsspScoreConstraint::new(),)
 }
 
-fn precedence_penalty(previous: &JsspOperation, next: &JsspOperation) -> HardSoftScore {
-    let violation = previous
-        .end()
-        .zip(next.start)
-        .map(|(previous_end, next_start)| previous_end.saturating_sub(next_start))
-        .unwrap_or(1);
-    HardSoftScore::of_hard(violation as i64)
+struct JsspScoreConstraint {
+    constraint_ref: ConstraintRef,
 }
 
-fn overlaps(left: &JsspOperation, right: &JsspOperation) -> bool {
-    let (Some(left_start), Some(left_end), Some(right_start), Some(right_end)) =
-        (left.start, left.end(), right.start, right.end())
-    else {
-        return false;
-    };
-    left_start < right_end && right_start < left_end
-}
-
-fn overlap_penalty(left: &JsspOperation, right: &JsspOperation) -> HardSoftScore {
-    let (Some(left_start), Some(left_end), Some(right_start), Some(right_end)) =
-        (left.start, left.end(), right.start, right.end())
-    else {
-        return HardSoftScore::of_hard(1);
-    };
-    let overlap = left_end
-        .min(right_end)
-        .saturating_sub(left_start.max(right_start));
-    HardSoftScore::of_hard(overlap as i64)
-}
+impl JsspScoreConstraint {
+    fn new() -> Self {
+        Self {
+            constraint_ref: ConstraintRef::new("", "jsspSchedule"),
+        }
+    }
 
-struct MaxEndCollector;
+    fn score(solution: &JsspPlan) -> HardSoftScore {
+        let evaluation = solution.evaluate_schedule();
+        HardSoftScore::of(
+            -(evaluation.hard_penalty as i64),
+            -(evaluation.makespan as i64),
+        )
+    }
 
-impl Collector<&JsspOperation> for MaxEndCollector {
-    type Value = usize;
-    type Result = usize;
-    type Accumulator = MaxEndAccumulator;
+    fn match_count(solution: &JsspPlan) -> usize {
+        let evaluation = solution.evaluate_schedule();
+        evaluation.hard_penalty + usize::from(evaluation.makespan > 0)
+    }
+}
 
-    fn extract(&self, operation: &JsspOperation) -> Self::Value {
-        operation.end().unwrap_or(0)
+impl ConstraintSet<JsspPlan, HardSoftScore> for JsspScoreConstraint {
+    fn evaluate_all(&self, solution: &JsspPlan) -> HardSoftScore {
+        Self::score(solution)
     }
 
-    fn create_accumulator(&self) -> Self::Accumulator {
-        MaxEndAccumulator {
-            counts_by_end: BTreeMap::new(),
-            max_end: 0,
-        }
+    fn constraint_count(&self) -> usize {
+        1
     }
-}
 
-struct MaxEndAccumulator {
-    counts_by_end: BTreeMap<usize, usize>,
-    max_end: usize,
-}
+    fn constraint_metadata_entries(&self) -> Vec<ConstraintMetadata<'_>> {
+        vec![ConstraintMetadata::new(&self.constraint_ref, true)]
+    }
 
-impl Accumulator<usize, usize> for MaxEndAccumulator {
-    type Retraction = usize;
+    fn evaluate_each<'a>(
+        &'a self,
+        solution: &JsspPlan,
+    ) -> Vec<ConstraintResult<'a, HardSoftScore>> {
+        vec![ConstraintResult {
+            name: &self.constraint_ref.name,
+            score: Self::score(solution),
+            match_count: Self::match_count(solution),
+            is_hard: true,
+        }]
+    }
 
-    fn accumulate(&mut self, end: usize) -> Self::Retraction {
-        *self.counts_by_end.entry(end).or_insert(0) += 1;
-        self.max_end = self.max_end.max(end);
-        end
+    fn evaluate_detailed<'a>(
+        &'a self,
+        solution: &JsspPlan,
+    ) -> Vec<ConstraintAnalysis<'a, HardSoftScore>> {
+        vec![ConstraintAnalysis::new(
+            &self.constraint_ref,
+            HardSoftScore::ZERO,
+            Self::score(solution),
+            Vec::new(),
+            true,
+        )]
     }
 
-    fn retract(&mut self, end: Self::Retraction) {
-        if let Some(count) = self.counts_by_end.get_mut(&end) {
-            *count -= 1;
-            if *count == 0 {
-                self.counts_by_end.remove(&end);
-            }
-        }
-        if end == self.max_end {
-            self.max_end = self
-                .counts_by_end
-                .last_key_value()
-                .map_or(0, |(end, _)| *end);
-        }
+    fn initialize_all(&mut self, solution: &JsspPlan) -> HardSoftScore {
+        Self::score(solution)
     }
 
-    fn with_result<T>(&self, f: impl FnOnce(&usize) -> T) -> T {
-        f(&self.max_end)
+    fn on_insert_all(
+        &mut self,
+        solution: &JsspPlan,
+        _entity_index: usize,
+        _descriptor_index: usize,
+    ) -> HardSoftScore {
+        Self::score(solution)
     }
 
-    fn reset(&mut self) {
-        self.counts_by_end.clear();
-        self.max_end = 0;
+    fn on_retract_all(
+        &mut self,
+        solution: &JsspPlan,
+        _entity_index: usize,
+        _descriptor_index: usize,
+    ) -> HardSoftScore {
+        HardSoftScore::ZERO - Self::score(solution)
     }
+
+    fn reset_all(&mut self) {}
 }
diff --git a/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp/src/domain.rs b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp/src/domain.rs
index 5366e52..3286041 100644
--- a/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp/src/domain.rs
+++ b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp/src/domain.rs
@@ -1,12 +1,6 @@
 use solverforge::prelude::*;
 
 #[problem_fact]
-pub struct StartValue {
-    #[planning_id]
-    pub id: usize,
-}
-
-#[planning_entity]
 pub struct JsspOperation {
     #[planning_id]
     pub id: usize,
@@ -14,15 +8,24 @@ pub struct JsspOperation {
     pub op_index: usize,
     pub machine_id: usize,
     pub duration: usize,
+}
 
-    #[planning_variable(value_range_provider = "start_values", allows_unassigned = true)]
-    pub start: Option<usize>,
+#[planning_entity]
+pub struct MachineSequence {
+    #[planning_id]
+    pub id: usize,
+
+    #[planning_list_variable(
+        element_collection = "operations",
+        element_owner_fn = "operation_machine_owner"
+    )]
+    pub operations: Vec<usize>,
 }
 
-impl JsspOperation {
-    pub fn end(&self) -> Option<usize> {
-        self.start.map(|start| start + self.duration)
-    }
+pub struct ScheduleEvaluation {
+    pub starts: Vec<Option<usize>>,
+    pub makespan: usize,
+    pub hard_penalty: usize,
 }
 
 #[planning_solution(
@@ -32,24 +35,115 @@ impl JsspOperation {
 )]
 pub struct JsspPlan {
     #[problem_fact_collection]
-    pub start_values: Vec<StartValue>,
+    pub operations: Vec<JsspOperation>,
 
     #[planning_entity_collection]
-    pub operations: Vec<JsspOperation>,
+    pub machine_sequences: Vec<MachineSequence>,
 
     #[planning_score]
     pub score: Option<HardSoftScore>,
 
+    pub num_jobs: usize,
+    pub num_machines: usize,
     pub time_limit_secs: u64,
 }
 
 impl JsspPlan {
-    pub fn reported_makespan(&self) -> usize {
-        self.operations
+    pub fn evaluate_schedule(&self) -> ScheduleEvaluation {
+        let operation_count = self.operations.len();
+        let mut hard_penalty = 0usize;
+        let mut assigned_counts = vec![0usize; operation_count];
+        let mut edges = vec![Vec::new(); operation_count];
+        let mut indegree = vec![0usize; operation_count];
+
+        let job_count = self
+            .num_jobs
+            .max(self.operations.iter().map(|operation| operation.job_id + 1).max().unwrap_or(0));
+        let mut operations_by_job = vec![Vec::new(); job_count];
+        for operation in &self.operations {
+            if operation.job_id < operations_by_job.len() {
+                operations_by_job[operation.job_id].push((operation.op_index, operation.id));
+            }
+        }
+        for job_operations in &mut operations_by_job {
+            job_operations.sort_unstable_by_key(|(op_index, _)| *op_index);
+            for pair in job_operations.windows(2) {
+                add_edge(pair[0].1, pair[1].1, &mut edges, &mut indegree);
+            }
+        }
+
+        for machine in &self.machine_sequences {
+            if machine.id >= self.num_machines {
+                hard_penalty += machine.operations.len();
+            }
+            for &operation_id in &machine.operations {
+                let Some(operation) = self.operations.get(operation_id) else {
+                    hard_penalty += 1;
+                    continue;
+                };
+                assigned_counts[operation_id] += 1;
+                if operation.machine_id != machine.id {
+                    hard_penalty += 1;
+                }
+            }
+            for pair in machine.operations.windows(2) {
+                add_edge(pair[0], pair[1], &mut edges, &mut indegree);
+            }
+        }
+
+        for count in assigned_counts {
+            match count {
+                0 => hard_penalty += 1,
+                1 => {}
+                extra => hard_penalty += extra - 1,
+            }
+        }
+
+        let mut starts = vec![None; operation_count];
+        let mut earliest = vec![0usize; operation_count];
+        let mut ready = std::collections::VecDeque::new();
+        for (operation_id, degree) in indegree.iter().enumerate() {
+            if *degree == 0 {
+                ready.push_back(operation_id);
+            }
+        }
+
+        let mut processed = 0usize;
+        while let Some(operation_id) = ready.pop_front() {
+            processed += 1;
+            starts[operation_id] = Some(earliest[operation_id]);
+            let finish = earliest[operation_id] + self.operations[operation_id].duration;
+            for &next_id in &edges[operation_id] {
+                earliest[next_id] = earliest[next_id].max(finish);
+                indegree[next_id] -= 1;
+                if indegree[next_id] == 0 {
+                    ready.push_back(next_id);
+                }
+            }
+        }
+
+        if processed < operation_count {
+            hard_penalty += operation_count - processed;
+        }
+
+        let makespan = starts
             .iter()
-            .filter_map(JsspOperation::end)
+            .enumerate()
+            .filter_map(|(operation_id, start)| {
+                start.map(|value| value + self.operations[operation_id].duration)
+            })
             .max()
-            .unwrap_or(0)
+            .unwrap_or(0);
+
+        ScheduleEvaluation {
+            starts,
+            makespan,
+            hard_penalty,
+        }
+    }
+
+    pub fn reported_makespan(&self) -> usize {
+        self.evaluate_schedule().makespan
     }
 }
 
@@ -59,3 +153,22 @@ pub fn solver_config_for_plan(
 ) -> solverforge::SolverConfig {
     config.with_termination_seconds(plan.time_limit_secs.max(1))
 }
+
+pub fn operation_machine_owner(plan: &JsspPlan, operation_id: usize) -> Option<usize> {
+    plan.operations
+        .get(operation_id)
+        .map(|operation| operation.machine_id)
+}
+
+fn add_edge(
+    from: usize,
+    to: usize,
+    edges: &mut [Vec<usize>],
+    indegree: &mut [usize],
+) {
+    if from >= edges.len() || to >= edges.len() {
+        return;
+    }
+    edges[from].push(to);
+    indegree[to] += 1;
+}
diff --git a/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp/src/lib.rs b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp/src/lib.rs
index 2120e95..85a7419 100644
--- a/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp/src/lib.rs
+++ b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp/src/lib.rs
@@ -7,7 +7,7 @@ solverforge::planning_model! {
 
     pub use domain::JsspOperation;
     pub use domain::JsspPlan;
-    pub use domain::StartValue;
+    pub use domain::MachineSequence;
 }
 
 use pyo3::prelude::*;
@@ -44,32 +44,19 @@ struct OperationOutput {
 struct SolutionOutput {
     operations: Vec<OperationOutput>,
     reported_makespan: usize,
+    fair_start_witness: FairStartWitness,
 }
 
-fn dispatch_starts(input: &InstanceInput) -> Vec<usize> {
-    let mut job_ready = vec![0; input.num_jobs];
-    let mut machine_ready = vec![0; input.num_machines];
-    input
-        .operations
-        .iter()
-        .map(|operation| {
-            let start = job_ready[operation.job_id].max(machine_ready[operation.machine_id]);
-            let finish = start + operation.duration;
-            job_ready[operation.job_id] = finish;
-            machine_ready[operation.machine_id] = finish;
-            start
-        })
-        .collect()
+#[derive(Serialize)]
+struct FairStartWitness {
+    adapter_hint_count: usize,
+    preliminary_solve_count: usize,
+    fallback_solution_enabled: bool,
+    preassigned_scalar_variables: usize,
+    prefilled_list_variables: usize,
 }
 
 fn build_plan(input: InstanceInput, time_limit_secs: u64) -> JsspPlan {
-    let horizon = input
-        .operations
-        .iter()
-        .map(|operation| operation.duration)
-        .sum::<usize>()
-        .max(1);
-    let starts = dispatch_starts(&input);
     let operations = input
         .operations
         .into_iter()
@@ -80,14 +67,21 @@ fn build_plan(input: InstanceInput, time_limit_secs: u64) -> JsspPlan {
             op_index: operation.op_index,
             machine_id: operation.machine_id,
             duration: operation.duration,
-            start: Some(starts[id]),
+        })
+        .collect();
+    let machine_sequences = (0..input.num_machines)
+        .map(|id| MachineSequence {
+            id,
+            operations: Vec::new(),
         })
         .collect();
 
     JsspPlan {
-        start_values: (0..=horizon).map(|id| StartValue { id }).collect(),
         operations,
+        machine_sequences,
         score: None,
+        num_jobs: input.num_jobs,
+        num_machines: input.num_machines,
         time_limit_secs,
     }
 }
@@ -128,35 +122,30 @@ fn solve_plan(plan: JsspPlan) -> Result<JsspPlan, String> {
     best.ok_or_else(|| "SolverForge JSSP job produced no solution".to_string())
 }
 
-fn solution_output(plan: JsspPlan) -> Result<SolutionOutput, String> {
+fn solution_output(
+    plan: JsspPlan,
+    fair_start_witness: FairStartWitness,
+) -> Result<SolutionOutput, String> {
+    let evaluation = plan.evaluate_schedule();
     let mut operations: Vec<OperationOutput> = plan
         .operations
-        .into_iter()
+        .iter()
         .map(|operation| {
-            let start = operation.start.ok_or_else(|| {
-                format!(
-                    "SolverForge returned an unassigned start for job {} operation {}",
-                    operation.job_id, operation.op_index
-                )
-            })?;
-            Ok(OperationOutput {
+            let start = evaluation.starts[operation.id].unwrap_or(0);
+            OperationOutput {
                 job_id: operation.job_id,
                 op_index: operation.op_index,
                 machine_id: operation.machine_id,
                 start,
                 duration: operation.duration,
-            })
+            }
         })
-        .collect::<Result<_, String>>()?;
+        .collect();
     operations.sort_by_key(|operation| (operation.job_id, operation.op_index));
-    let reported_makespan = operations
-        .iter()
-        .map(|operation| operation.start + operation.duration)
-        .max()
-        .unwrap_or(0);
     Ok(SolutionOutput {
         operations,
-        reported_makespan,
+        reported_makespan: evaluation.makespan,
+        fair_start_witness,
     })
 }
 
@@ -165,8 +154,20 @@ fn solve_jssp(instance_json: &str, time_limit: u64) -> PyResult<String> {
     let input: InstanceInput = serde_json::from_str(instance_json)
         .map_err(|error| pyo3::exceptions::PyValueError::new_err(error.to_string()))?;
     let plan = build_plan(input, time_limit);
+    let fair_start_witness = FairStartWitness {
+        adapter_hint_count: 0,
+        preliminary_solve_count: 0,
+        fallback_solution_enabled: false,
+        preassigned_scalar_variables: 0,
+        prefilled_list_variables: plan
+            .machine_sequences
+            .iter()
+            .filter(|machine| !machine.operations.is_empty())
+            .count(),
+    };
     let solved = solve_plan(plan).map_err(pyo3::exceptions::PyRuntimeError::new_err)?;
-    let output = solution_output(solved).map_err(pyo3::exceptions::PyRuntimeError::new_err)?;
+    let output = solution_output(solved, fair_start_witness)
+        .map_err(pyo3::exceptions::PyRuntimeError::new_err)?;
     serde_json::to_string(&output)
         .map_err(|error| pyo3::exceptions::PyValueError::new_err(error.to_string()))
 }
diff --git a/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold/src/main/java/com/solverforgebench/jssp/JsspConstraintProvider.java b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold/src/main/java/com/solverforgebench/jssp/JsspConstraintProvider.java
deleted file mode 100644
index 79c0ea5..0000000
--- a/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold/src/main/java/com/solverforgebench/jssp/JsspConstraintProvider.java
+++ /dev/null
@@ -1,70 +0,0 @@
-package com.solverforgebench.jssp;
-
-import ai.timefold.solver.core.api.score.HardSoftScore;
-import ai.timefold.solver.core.api.score.stream.Constraint;
-import ai.timefold.solver.core.api.score.stream.ConstraintCollectors;
-import ai.timefold.solver.core.api.score.stream.ConstraintFactory;
-import ai.timefold.solver.core.api.score.stream.ConstraintProvider;
-import ai.timefold.solver.core.api.score.stream.Joiners;
-
-import com.solverforgebench.jssp.domain.OperationAssignment;
-
-public class JsspConstraintProvider implements ConstraintProvider {
-
-    @Override
-    public Constraint[] defineConstraints(ConstraintFactory factory) {
-        return new Constraint[]{
-                assignedStart(factory),
-                jobPrecedence(factory),
-                machineNoOverlap(factory),
-                makespan(factory),
-        };
-    }
-
-    Constraint assignedStart(ConstraintFactory factory) {
-        return factory.forEachIncludingUnassigned(OperationAssignment.class)
-                .filter(operation -> !operation.isAssigned())
-                .penalize(HardSoftScore.ONE_HARD)
-                .asConstraint("assignedStart");
-    }
-
-    Constraint jobPrecedence(ConstraintFactory factory) {
-        return factory.forEachUniquePair(OperationAssignment.class,
-                        Joiners.equal(OperationAssignment::getJobId))
-                .filter((left, right) -> left.isAssigned() && right.isAssigned())
-                .filter((left, right) -> Math.abs(left.getOpIndex() - right.getOpIndex()) == 1)
-                .penalize(HardSoftScore.ONE_HARD, JsspConstraintProvider::precedenceViolation)
-                .asConstraint("jobPrecedence");
-    }
-
-    Constraint machineNoOverlap(ConstraintFactory factory) {
-        return factory.forEachUniquePair(OperationAssignment.class,
-                        Joiners.equal(OperationAssignment::getMachineId))
-                .filter((left, right) -> left.isAssigned() && right.isAssigned())
-                .filter(JsspConstraintProvider::overlaps)
-                .penalize(HardSoftScore.ONE_HARD, JsspConstraintProvider::overlapAmount)
-                .asConstraint("machineNoOverlap");
-    }
-
-    Constraint makespan(ConstraintFactory factory) {
-        return factory.forEach(OperationAssignment.class)
-                .filter(OperationAssignment::isAssigned)
-                .groupBy(ConstraintCollectors.max(OperationAssignment::getEnd))
-                .penalize(HardSoftScore.ONE_SOFT, value -> value == null ? 0 : value)
-                .asConstraint("makespan");
-    }
-
-    private static int precedenceViolation(OperationAssignment left, OperationAssignment right) {
-        OperationAssignment previous = left.getOpIndex() < right.getOpIndex() ? left : right;
-        OperationAssignment next = previous == left ? right : left;
-        return Math.max(0, previous.getEnd() - next.getStart());
-    }
-
-    private static boolean overlaps(OperationAssignment left, OperationAssignment right) {
-        return left.getStart() < right.getEnd() && right.getStart() < left.getEnd();
-    }
-
-    private static int overlapAmount(OperationAssignment left, OperationAssignment right) {
-        return Math.max(0, Math.min(left.getEnd(), right.getEnd()) - Math.max(left.getStart(), right.getStart()));
-    }
-}
diff --git a/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold/src/main/java/com/solverforgebench/jssp/JsspEasyScoreCalculator.java b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold/src/main/java/com/solverforgebench/jssp/JsspEasyScoreCalculator.java
new file mode 100644
index 0000000..201dc2a
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold/src/main/java/com/solverforgebench/jssp/JsspEasyScoreCalculator.java
@@ -0,0 +1,14 @@
+package com.solverforgebench.jssp;
+
+import ai.timefold.solver.core.api.score.HardSoftScore;
+import ai.timefold.solver.core.api.score.calculator.EasyScoreCalculator;
+
+import com.solverforgebench.jssp.domain.JsspSchedule;
+
+public class JsspEasyScoreCalculator implements EasyScoreCalculator<JsspSchedule, HardSoftScore> {
+
+    @Override
+    public HardSoftScore calculateScore(JsspSchedule schedule) {
+        return JsspScheduleEvaluator.evaluate(schedule).score();
+    }
+}
diff --git a/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold/src/main/java/com/solverforgebench/jssp/JsspScheduleEvaluator.java b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold/src/main/java/com/solverforgebench/jssp/JsspScheduleEvaluator.java
new file mode 100644
index 0000000..f2a8300
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold/src/main/java/com/solverforgebench/jssp/JsspScheduleEvaluator.java
@@ -0,0 +1,159 @@
+package com.solverforgebench.jssp;
+
+import ai.timefold.solver.core.api.score.HardSoftScore;
+
+import com.solverforgebench.jssp.domain.JsspSchedule;
+import com.solverforgebench.jssp.domain.MachineSequence;
+import com.solverforgebench.jssp.domain.OperationAssignment;
+
+import java.util.ArrayDeque;
+import java.util.ArrayList;
+import java.util.Comparator;
+import java.util.List;
+
+public final class JsspScheduleEvaluator {
+
+    private JsspScheduleEvaluator() {
+    }
+
+    public record Evaluation(int[] starts, boolean[] startKnown, int makespan, int hardPenalty) {
+
+        public HardSoftScore score() {
+            return HardSoftScore.of(-hardPenalty, -makespan);
+        }
+
+        public int startFor(OperationAssignment operation) {
+            int operationId = operation.getId();
+            if (operationId < 0 || operationId >= starts.length || !startKnown[operationId]) {
+                return 0;
+            }
+            return starts[operationId];
+        }
+    }
+
+    public static Evaluation evaluate(JsspSchedule schedule) {
+        List<OperationAssignment> operations = schedule.getOperations();
+        int operationCount = operations == null ? 0 : operations.size();
+        int hardPenalty = 0;
+
+        OperationAssignment[] byId = new OperationAssignment[operationCount];
+        for (OperationAssignment operation : operations) {
+            int operationId = operation.getId();
+            if (operationId >= 0 && operationId < operationCount) {
+                byId[operationId] = operation;
+            } else {
+                hardPenalty++;
+            }
+        }
+
+        List<List<Integer>> edges = new ArrayList<>(operationCount);
+        for (int i = 0; i < operationCount; i++) {
+            edges.add(new ArrayList<>());
+        }
+        int[] indegree = new int[operationCount];
+        int jobCount = Math.max(schedule.getNumJobs(), operations.stream()
+                .mapToInt(operation -> operation.getJobId() + 1)
+                .max()
+                .orElse(0));
+        List<List<OperationAssignment>> operationsByJob = new ArrayList<>(jobCount);
+        for (int i = 0; i < jobCount; i++) {
+            operationsByJob.add(new ArrayList<>());
+        }
+        for (OperationAssignment operation : operations) {
+            if (operation.getJobId() >= 0 && operation.getJobId() < operationsByJob.size()) {
+                operationsByJob.get(operation.getJobId()).add(operation);
+            }
+        }
+        for (List<OperationAssignment> jobOperations : operationsByJob) {
+            jobOperations.sort(Comparator.comparingInt(OperationAssignment::getOpIndex));
+            for (int i = 0; i + 1 < jobOperations.size(); i++) {
+                addEdge(jobOperations.get(i).getId(), jobOperations.get(i + 1).getId(), edges, indegree);
+            }
+        }
+
+        int[] assignedCounts = new int[operationCount];
+        List<MachineSequence> machineSequences = schedule.getMachineSequences();
+        if (machineSequences != null) {
+            for (MachineSequence machine : machineSequences) {
+                List<OperationAssignment> machineOperations = machine.getOperations();
+                if (machine.getId() >= schedule.getNumMachines()) {
+                    hardPenalty += machineOperations.size();
+                }
+                for (OperationAssignment operation : machineOperations) {
+                    int operationId = operation.getId();
+                    if (operationId < 0 || operationId >= operationCount || byId[operationId] == null) {
+                        hardPenalty++;
+                        continue;
+                    }
+                    assignedCounts[operationId]++;
+                    if (operation.getMachineId() != machine.getId()) {
+                        hardPenalty++;
+                    }
+                }
+                for (int i = 0; i + 1 < machineOperations.size(); i++) {
+                    addEdge(machineOperations.get(i).getId(), machineOperations.get(i + 1).getId(), edges, indegree);
+                }
+            }
+        }
+
+        for (int count : assignedCounts) {
+            if (count == 0) {
+                hardPenalty++;
+            } else if (count > 1) {
+                hardPenalty += count - 1;
+            }
+        }
+
+        int[] starts = new int[operationCount];
+        boolean[] startKnown = new boolean[operationCount];
+        int[] earliest = new int[operationCount];
+        ArrayDeque<Integer> ready = new ArrayDeque<>();
+        for (int i = 0; i < operationCount; i++) {
+            if (indegree[i] == 0) {
+                ready.add(i);
+            }
+        }
+
+        int processed = 0;
+        while (!ready.isEmpty()) {
+            int operationId = ready.removeFirst();
+            OperationAssignment operation = byId[operationId];
+            if (operation == null) {
+                continue;
+            }
+            processed++;
+            starts[operationId] = earliest[operationId];
+            startKnown[operationId] = true;
+            int finish = earliest[operationId] + operation.getDuration();
+            for (int nextId : edges.get(operationId)) {
+                earliest[nextId] = Math.max(earliest[nextId], finish);
+                indegree[nextId]--;
+                if (indegree[nextId] == 0) {
+                    ready.add(nextId);
+                }
+            }
+        }
+
+        if (processed < operationCount) {
+            hardPenalty += operationCount - processed;
+        }
+
+        int makespan = 0;
+        for (OperationAssignment operation : operations) {
+            int operationId = operation.getId();
+            if (operationId >= 0 && operationId < operationCount && startKnown[operationId]) {
+                makespan = Math.max(makespan, starts[operationId] + operation.getDuration());
+            }
+        }
+
+        return new Evaluation(starts, startKnown, makespan, hardPenalty);
+    }
+
+    private static void addEdge(int from, int to, List<List<Integer>> edges, int[] indegree) {
+        if (from < 0 || to < 0 || from >= edges.size() || to >= edges.size()) {
+            return;
+        }
+        edges.get(from).add(to);
+        indegree[to]++;
+    }
+}
diff --git a/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold/src/main/java/com/solverforgebench/jssp/Main.java b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold/src/main/java/com/solverforgebench/jssp/Main.java
index efee2b6..5404680 100644
--- a/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold/src/main/java/com/solverforgebench/jssp/Main.java
+++ b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold/src/main/java/com/solverforgebench/jssp/Main.java
@@ -9,6 +9,7 @@
 import com.fasterxml.jackson.databind.DeserializationFeature;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.solverforgebench.jssp.domain.JsspSchedule;
+import com.solverforgebench.jssp.domain.MachineSequence;
 import com.solverforgebench.jssp.domain.OperationAssignment;
 
 import java.util.ArrayList;
@@ -49,7 +50,7 @@ static class OperationOutput {
             this.jobId = operation.getJobId();
             this.opIndex = operation.getOpIndex();
             this.machineId = operation.getMachineId();
-            this.start = operation.getStart();
+            this.start = operation.getStart() == null ? 0 : operation.getStart();
             this.duration = operation.getDuration();
         }
     }
@@ -58,10 +59,30 @@ static class JsspOutput {
         public List<OperationOutput> operations;
         @JsonProperty("reported_makespan")
         public int reportedMakespan;
+        @JsonProperty("fair_start_witness")
+        public FairStartWitness fairStartWitness;
 
-        JsspOutput(List<OperationOutput> operations, int reportedMakespan) {
+        JsspOutput(List<OperationOutput> operations, int reportedMakespan, FairStartWitness fairStartWitness) {
             this.operations = operations;
             this.reportedMakespan = reportedMakespan;
+            this.fairStartWitness = fairStartWitness;
+        }
+    }
+
+    static class FairStartWitness {
+        @JsonProperty("adapter_hint_count")
+        public int adapterHintCount = 0;
+        @JsonProperty("preliminary_solve_count")
+        public int preliminarySolveCount = 0;
+        @JsonProperty("fallback_solution_enabled")
+        public boolean fallbackSolutionEnabled = false;
+        @JsonProperty("preassigned_scalar_variables")
+        public int preassignedScalarVariables = 0;
+        @JsonProperty("prefilled_list_variables")
+        public int prefilledListVariables;
+
+        FairStartWitness(int prefilledListVariables) {
+            this.prefilledListVariables = prefilledListVariables;
         }
     }
 
@@ -76,13 +97,6 @@ public static void main(String[] args) throws Exception {
                 .configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
         InstanceInput input = mapper.readValue(System.in, InstanceInput.class);
 
-        int horizon = input.operations.stream().mapToInt(operation -> operation.duration).sum();
-        List<Integer> startRange = new ArrayList<>();
-        for (int i = 0; i <= horizon; i++) {
-            startRange.add(i);
-        }
-
-        List<Integer> dispatchStarts = dispatchStarts(input);
         List<OperationAssignment> operations = new ArrayList<>();
         for (int i = 0; i < input.operations.size(); i++) {
             OperationInput operation = input.operations.get(i);
@@ -91,15 +105,34 @@ public static void main(String[] args) throws Exception {
                     operation.jobId,
                     operation.opIndex,
                     operation.machineId,
-                    operation.duration,
-                    dispatchStarts.get(i)));
+                    operation.duration));
         }
 
-        JsspSchedule problem = new JsspSchedule(startRange, operations);
+        List<List<OperationAssignment>> operationsByMachine = new ArrayList<>();
+        for (int i = 0; i < input.numMachines; i++) {
+            operationsByMachine.add(new ArrayList<>());
+        }
+        for (OperationAssignment operation : operations) {
+            if (operation.getMachineId() >= 0 && operation.getMachineId() < input.numMachines) {
+                operationsByMachine.get(operation.getMachineId()).add(operation);
+            }
+        }
+
+        List<MachineSequence> machineSequences = new ArrayList<>();
+        for (int i = 0; i < input.numMachines; i++) {
+            machineSequences.add(new MachineSequence(i, operationsByMachine.get(i)));
+        }
+
+        JsspSchedule problem = new JsspSchedule(
+                input.numJobs,
+                input.numMachines,
+                machineSequences,
+                operations);
+        FairStartWitness fairStartWitness = fairStartWitness(problem);
         SolverConfig solverConfig = new SolverConfig()
                 .withSolutionClass(JsspSchedule.class)
-                .withEntityClasses(OperationAssignment.class)
-                .withConstraintProviderClass(JsspConstraintProvider.class)
+                .withEntityClasses(MachineSequence.class, OperationAssignment.class)
+                .withEasyScoreCalculatorClass(JsspEasyScoreCalculator.class)
                 .withRandomSeed(1L)
                 .withMoveThreadCount(SolverConfig.MOVE_THREAD_COUNT_NONE)
                 .withTerminationConfig(new TerminationConfig()
@@ -109,30 +142,26 @@ public static void main(String[] args) throws Exception {
         Solver<JsspSchedule> solver = solverFactory.buildSolver();
         JsspSchedule solution = solver.solve(problem);
 
+        JsspScheduleEvaluator.Evaluation evaluation = JsspScheduleEvaluator.evaluate(solution);
+        for (OperationAssignment operation : solution.getOperations()) {
+            operation.setStart(evaluation.startFor(operation));
+        }
         List<OperationOutput> outputOperations = solution.getOperations().stream()
                 .sorted(Comparator
                         .comparingInt(OperationAssignment::getJobId)
-                        .thenComparingInt(OperationAssignment::getOpIndex))
+                .thenComparingInt(OperationAssignment::getOpIndex))
                 .map(OperationOutput::new)
                 .toList();
-        int makespan = solution.getOperations().stream()
-                .mapToInt(OperationAssignment::getEnd)
-                .max()
-                .orElse(0);
-        mapper.writeValue(System.out, new JsspOutput(outputOperations, makespan));
+        mapper.writeValue(System.out, new JsspOutput(outputOperations, evaluation.makespan(), fairStartWitness));
     }
 
-    private static List<Integer> dispatchStarts(InstanceInput input) {
-        int[] jobReady = new int[input.numJobs];
-        int[] machineReady = new int[input.numMachines];
-        List<Integer> starts = new ArrayList<>();
-        for (OperationInput operation : input.operations) {
-            int start = Math.max(jobReady[operation.jobId], machineReady[operation.machineId]);
-            starts.add(start);
-            int finish = start + operation.duration;
-            jobReady[operation.jobId] = finish;
-            machineReady[operation.machineId] = finish;
+    private static FairStartWitness fairStartWitness(JsspSchedule problem) {
+        int prefilled = 0;
+        for (MachineSequence machine : problem.getMachineSequences()) {
+            if (!machine.getOperations().isEmpty()) {
+                prefilled++;
+            }
         }
-        return starts;
+        return new FairStartWitness(prefilled);
     }
 }
diff --git a/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold/src/main/java/com/solverforgebench/jssp/domain/JsspSchedule.java b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold/src/main/java/com/solverforgebench/jssp/domain/JsspSchedule.java
index 40e7351..d1e0132 100644
--- a/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold/src/main/java/com/solverforgebench/jssp/domain/JsspSchedule.java
+++ b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold/src/main/java/com/solverforgebench/jssp/domain/JsspSchedule.java
@@ -3,8 +3,6 @@
 import ai.timefold.solver.core.api.domain.solution.PlanningEntityCollectionProperty;
 import ai.timefold.solver.core.api.domain.solution.PlanningScore;
 import ai.timefold.solver.core.api.domain.solution.PlanningSolution;
-import ai.timefold.solver.core.api.domain.solution.ProblemFactCollectionProperty;
-import ai.timefold.solver.core.api.domain.valuerange.ValueRangeProvider;
 import ai.timefold.solver.core.api.score.HardSoftScore;
 
 import java.util.List;
@@ -12,9 +10,11 @@
 @PlanningSolution
 public class JsspSchedule {
 
-    @ProblemFactCollectionProperty
-    @ValueRangeProvider(id = "startRange")
-    private List<Integer> startRange;
+    private int numJobs;
+    private int numMachines;
+
+    @PlanningEntityCollectionProperty
+    private List<MachineSequence> machineSequences;
 
     @PlanningEntityCollectionProperty
     private List<OperationAssignment> operations;
@@ -25,13 +25,27 @@ public class JsspSchedule {
     public JsspSchedule() {
     }
 
-    public JsspSchedule(List<Integer> startRange, List<OperationAssignment> operations) {
-        this.startRange = startRange;
+    public JsspSchedule(
+            int numJobs,
+            int numMachines,
+            List<MachineSequence> machineSequences,
+            List<OperationAssignment> operations) {
+        this.numJobs = numJobs;
+        this.numMachines = numMachines;
+        this.machineSequences = machineSequences;
         this.operations = operations;
     }
 
-    public List<Integer> getStartRange() {
-        return startRange;
+    public int getNumJobs() {
+        return numJobs;
+    }
+
+    public int getNumMachines() {
+        return numMachines;
+    }
+
+    public List<MachineSequence> getMachineSequences() {
+        return machineSequences;
     }
 
     public List<OperationAssignment> getOperations() {
diff --git a/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold/src/main/java/com/solverforgebench/jssp/domain/MachineSequence.java b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold/src/main/java/com/solverforgebench/jssp/domain/MachineSequence.java
new file mode 100644
index 0000000..58fa4ff
--- /dev/null
+++ b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold/src/main/java/com/solverforgebench/jssp/domain/MachineSequence.java
@@ -0,0 +1,50 @@
+package com.solverforgebench.jssp.domain;
+
+import ai.timefold.solver.core.api.domain.common.PlanningId;
+import ai.timefold.solver.core.api.domain.entity.PlanningEntity;
+import ai.timefold.solver.core.api.domain.valuerange.ValueRangeProvider;
+import ai.timefold.solver.core.api.domain.variable.PlanningListVariable;
+
+import java.util.ArrayList;
+import java.util.List;
+
+@PlanningEntity
+public class MachineSequence {
+
+    @PlanningId
+    private int id;
+
+    private List<OperationAssignment> eligibleOperations = new ArrayList<>();
+
+    @PlanningListVariable(valueRangeProviderRefs = "machineOperationRange")
+    private List<OperationAssignment> operations = new ArrayList<>();
+
+    public MachineSequence() {
+    }
+
+    public MachineSequence(int id, List<OperationAssignment> eligibleOperations) {
+        this.id = id;
+        this.eligibleOperations = eligibleOperations;
+    }
+
+    public int getId() {
+        return id;
+    }
+
+    public List<OperationAssignment> getOperations() {
+        return operations;
+    }
+
+    public void setOperations(List<OperationAssignment> operations) {
+        this.operations = operations;
+    }
+
+    @ValueRangeProvider(id = "machineOperationRange")
+    public List<OperationAssignment> getEligibleOperations() {
+        return eligibleOperations;
+    }
+
+    public void setEligibleOperations(List<OperationAssignment> eligibleOperations) {
+        this.eligibleOperations = eligibleOperations;
+    }
+}
diff --git a/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold/src/main/java/com/solverforgebench/jssp/domain/OperationAssignment.java b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold/src/main/java/com/solverforgebench/jssp/domain/OperationAssignment.java
index 74493af..c99c1b8 100644
--- a/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold/src/main/java/com/solverforgebench/jssp/domain/OperationAssignment.java
+++ b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold/src/main/java/com/solverforgebench/jssp/domain/OperationAssignment.java
@@ -2,7 +2,9 @@
 
 import ai.timefold.solver.core.api.domain.common.PlanningId;
 import ai.timefold.solver.core.api.domain.entity.PlanningEntity;
-import ai.timefold.solver.core.api.domain.variable.PlanningVariable;
+import ai.timefold.solver.core.api.domain.variable.InverseRelationShadowVariable;
+import ai.timefold.solver.core.api.domain.variable.NextElementShadowVariable;
+import ai.timefold.solver.core.api.domain.variable.PreviousElementShadowVariable;
 
 @PlanningEntity
 public class OperationAssignment {
@@ -14,19 +16,26 @@ public class OperationAssignment {
     private int machineId;
     private int duration;
 
-    @PlanningVariable(valueRangeProviderRefs = "startRange")
+    @InverseRelationShadowVariable(sourceVariableName = "operations")
+    private MachineSequence machineSequence;
+
+    @PreviousElementShadowVariable(sourceVariableName = "operations")
+    private OperationAssignment previousOnMachine;
+
+    @NextElementShadowVariable(sourceVariableName = "operations")
+    private OperationAssignment nextOnMachine;
+
     private Integer start;
 
     public OperationAssignment() {
     }
 
-    public OperationAssignment(int id, int jobId, int opIndex, int machineId, int duration, Integer start) {
+    public OperationAssignment(int id, int jobId, int opIndex, int machineId, int duration) {
         this.id = id;
         this.jobId = jobId;
         this.opIndex = opIndex;
         this.machineId = machineId;
         this.duration = duration;
-        this.start = start;
     }
 
     public int getId() {
@@ -58,10 +67,34 @@ public void setStart(Integer start) {
     }
 
     public boolean isAssigned() {
-        return start != null;
+        return machineSequence != null;
     }
 
     public int getEnd() {
         return start == null ? 0 : start + duration;
     }
+
+    public MachineSequence getMachineSequence() {
+        return machineSequence;
+    }
+
+    public void setMachineSequence(MachineSequence machineSequence) {
+        this.machineSequence = machineSequence;
+    }
+
+    public OperationAssignment getPreviousOnMachine() {
+        return previousOnMachine;
+    }
+
+    public void setPreviousOnMachine(OperationAssignment previousOnMachine) {
+        this.previousOnMachine = previousOnMachine;
+    }
+
+    public OperationAssignment getNextOnMachine() {
+        return nextOnMachine;
+    }
+
+    public void setNextOnMachine(OperationAssignment nextOnMachine) {
+        this.nextOnMachine = nextOnMachine;
+    }
 }

From 509acb1f2a7e1980f3e46e7dda042fdc40174825 Mon Sep 17 00:00:00 2001
From: Vittorio Distefano <info@vdistefano.studio>
Date: Thu, 28 May 2026 16:58:55 +0200
Subject: [PATCH 23/29] feat(bench): enforce runtime fair-start witnesses

Introduce a SolverResult/FairStartWitness contract at the shared execution boundary. Solver child processes now validate witnesses, surface missing or invalid witnesses as fatal fair-start violations, and preserve ordinary solver failures as benchmark rows once a clean pre-solve witness has been emitted.

Persist fair-start validity, errors, and witness JSON through CSV, normalization, PostgreSQL rows, and result views. The new migration backfills legacy rows as invalid-with-reason and adds witness indexes for audit queries.

Wire every active Python solver wrapper to emit a witness before invoking its solver and to return SolverResult. Native adapters add solver-specific checks where available, including CP-SAT solution-hint counts, Timefold planning-state counts, and SolverForge list/scalar start counts.

Validated with python3.14 compileall, make verify-fair-start, make db-migrate, and row verification for successful DB smokes: CVRP 5ac670bd-65e5-431e-8494-0475d92e2af5, employee 5b1058de-c7d1-42e7-bd28-a187f88eba3a, and job-shop 32fe5d16-9ad1-4981-8ead-ae5710c4f524.
---
 .github/workflows/ci.yml                      |  22 +-
 Makefile                                      |   9 +-
 .../src/cvrp_bench/solver/ortools/__init__.py |  38 +-
 .../src/cvrp_bench/solver/ortools/main.cc     |  12 +
 .../cvrp/src/cvrp_bench/solver/pyhygese.py    |  17 +-
 .../cvrp/src/cvrp_bench/solver/pyvrp.py       |  20 +-
 .../src/cvrp_bench/solver/rustvrp/rustvrp.py  |  30 +-
 .../cvrp/src/cvrp_bench/solver/solver.py      |   6 +-
 .../cvrp/src/cvrp_bench/solver/solverforge.py |  29 +-
 .../cvrp_bench/solver/solverforge/src/lib.rs  |  27 +-
 .../cvrp/src/cvrp_bench/solver/timefold.py    |  19 +-
 .../src/cvrp_bench/solver/vroom/__init__.py   |  30 +-
 .../20260528000000_add_fair_start_witness.sql | 108 +++++
 .../solver/ortools/__init__.py                |  43 +-
 .../solver/solver.py                          |   6 +-
 .../solver/solverforge.py                     |  50 +-
 .../solver/solverforge_nrp/src/lib.rs         |   8 +
 .../solver/timefold.py                        |  43 +-
 .../java/com/solverforgebench/nrp/Main.java   |  35 +-
 .../job_shop_bench/solver/ortools/__init__.py |  53 ++-
 .../src/job_shop_bench/solver/ortools/main.cc |  17 +-
 .../src/job_shop_bench/solver/solver.py       |   6 +-
 .../src/job_shop_bench/solver/solverforge.py  |  50 +-
 .../src/job_shop_bench/solver/timefold.py     |  53 ++-
 scripts/normalize_results.py                  |  11 +
 scripts/verify_fair_start.py                  | 437 ++++++++++++++++++
 src/solverforge_bench/csv.py                  |   6 +
 src/solverforge_bench/etl.py                  |   6 +
 src/solverforge_bench/execution.py            | 134 +++++-
 src/solverforge_bench/fair_start.py           | 212 +++++++++
 src/solverforge_bench/model.py                |  40 +-
 src/solverforge_bench/postgres.py             |  15 +
 src/solverforge_bench/runner.py               |   8 +
 33 files changed, 1465 insertions(+), 135 deletions(-)
 create mode 100644 migrations/20260528000000_add_fair_start_witness.sql
 create mode 100644 scripts/verify_fair_start.py
 create mode 100644 src/solverforge_bench/fair_start.py

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 06ecb35..e216a12 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -13,7 +13,7 @@ concurrency:
 
 env:
   CARGO_TERM_COLOR: always
-  BENCH_PYTHONPATH: src:list-variable/cvrp/src:scalar-variable/employee-scheduling/src
+  BENCH_PYTHONPATH: src:list-variable/cvrp/src:scalar-variable/employee-scheduling/src:scalar-variable/job-shop-scheduling/src
 
 jobs:
   python-github:
@@ -37,7 +37,7 @@ jobs:
           make install-python-deps HOST_PYTHON="${{ steps.setup-python.outputs.python-path }}"
 
       - name: Check Python syntax
-        run: python -m compileall -q src list-variable/cvrp/src scalar-variable/employee-scheduling/src scripts
+        run: python -m compileall -q src list-variable/cvrp/src scalar-variable/employee-scheduling/src scalar-variable/job-shop-scheduling/src scripts
 
       - name: Validate TOML configuration examples
         run: |
@@ -51,6 +51,9 @@ jobs:
               print(f"valid TOML: {path}")
           PY
 
+      - name: Verify fair-start witness contract
+        run: make verify-fair-start
+
       - name: Validate CVRP bundled instances
         env:
           PYTHONPATH: ${{ env.BENCH_PYTHONPATH }}
@@ -82,7 +85,7 @@ jobs:
           make install-python-deps HOST_PYTHON="${{ steps.setup-python.outputs.python-path }}"
 
       - name: Check Python syntax
-        run: python -m compileall -q src list-variable/cvrp/src scalar-variable/employee-scheduling/src scripts
+        run: python -m compileall -q src list-variable/cvrp/src scalar-variable/employee-scheduling/src scalar-variable/job-shop-scheduling/src scripts
 
       - name: Validate TOML configuration examples
         run: |
@@ -96,6 +99,9 @@ jobs:
               print(f"valid TOML: {path}")
           PY
 
+      - name: Verify fair-start witness contract
+        run: make verify-fair-start
+
       - name: Validate CVRP bundled instances
         env:
           PYTHONPATH: ${{ env.BENCH_PYTHONPATH }}
@@ -118,6 +124,7 @@ jobs:
           - list-variable/cvrp/src/cvrp_bench/solver/solverforge
           - list-variable/cvrp/src/cvrp_bench/solver/rustvrp
           - scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/solverforge_nrp
+          - scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp
 
     steps:
       - name: Checkout repository
@@ -126,9 +133,7 @@ jobs:
       - name: Checkout SolverForge path dependencies
         run: |
           rm -rf "$GITHUB_WORKSPACE/../solverforge"
-          rm -rf "$GITHUB_WORKSPACE/../solverforge-node-sharing"
-          git clone --depth 1 --branch v0.14.1 "${GITHUB_SERVER_URL:-https://github.com}/SolverForge/solverforge.git" "$GITHUB_WORKSPACE/../solverforge"
-          git clone --depth 1 --branch feat/node-sharing-compiler "${GITHUB_SERVER_URL:-https://github.com}/SolverForge/solverforge.git" "$GITHUB_WORKSPACE/../solverforge-node-sharing"
+          git clone --depth 1 --branch main "${GITHUB_SERVER_URL:-https://github.com}/SolverForge/solverforge.git" "$GITHUB_WORKSPACE/../solverforge"
 
       - name: Set up Python
         uses: actions/setup-python@v6
@@ -175,6 +180,7 @@ jobs:
           - list-variable/cvrp/src/cvrp_bench/solver/solverforge
           - list-variable/cvrp/src/cvrp_bench/solver/rustvrp
           - scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/solverforge_nrp
+          - scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp
 
     steps:
       - name: Checkout repository
@@ -183,9 +189,7 @@ jobs:
       - name: Checkout SolverForge path dependencies
         run: |
           rm -rf "$GITHUB_WORKSPACE/../solverforge"
-          rm -rf "$GITHUB_WORKSPACE/../solverforge-node-sharing"
-          git clone --depth 1 --branch v0.14.1 "${GITHUB_SERVER_URL:-https://github.com}/SolverForge/solverforge.git" "$GITHUB_WORKSPACE/../solverforge"
-          git clone --depth 1 --branch feat/node-sharing-compiler "${GITHUB_SERVER_URL:-https://github.com}/SolverForge/solverforge.git" "$GITHUB_WORKSPACE/../solverforge-node-sharing"
+          git clone --depth 1 --branch main "${GITHUB_SERVER_URL:-https://github.com}/SolverForge/solverforge.git" "$GITHUB_WORKSPACE/../solverforge"
 
       - name: Set up Python
         uses: actions/setup-python@v6
diff --git a/Makefile b/Makefile
index 5c4144c..7efe252 100644
--- a/Makefile
+++ b/Makefile
@@ -88,7 +88,7 @@ MAVEN_ENV := JAVA_HOME="$(JAVA_HOME_FOR_MAVEN)" PATH="$(JAVA_HOME_FOR_MAVEN)/bin
 	bench-job-shop-scheduling-solverforge bench-job-shop-scheduling-solverforge-db \
 	bench-job-shop-scheduling-solverforge-quick bench-job-shop-scheduling-solverforge-quick-db \
 	bench-nightly-db \
-	validate-cvrp validate-employee-scheduling validate-employee-model-parity validate-job-shop-scheduling \
+	verify-fair-start verify-fair-start-rows validate-cvrp validate-employee-scheduling validate-employee-model-parity validate-job-shop-scheduling \
 	db-check db-create db-migrate db-reset normalize-results
 
 # ============== Default Target ==============
@@ -104,6 +104,13 @@ banner:
 	@printf -- "                                             |___/$(RESET)\n"
 	@printf -- "  $(GRAY)v$(VERSION)$(RESET) $(EMERALD)Benchmark Build System$(RESET)\n\n"
 
+verify-fair-start: banner venv
+	"$(PYTHON)" scripts/verify_fair_start.py
+
+verify-fair-start-rows: banner venv
+	@test -n "$(RUN_ID)" || (echo "RUN_ID is required" >&2; exit 2)
+	"$(PYTHON)" scripts/verify_fair_start.py --run-id "$(RUN_ID)" --database-url "$(DATABASE_URL)"
+
 venv:
 	@if [ -x "$(PYTHON)" ]; then \
 		current="$$("$(PYTHON)" -c 'import sys; print(f"{sys.version_info.major}.{sys.version_info.minor}")')"; \
diff --git a/list-variable/cvrp/src/cvrp_bench/solver/ortools/__init__.py b/list-variable/cvrp/src/cvrp_bench/solver/ortools/__init__.py
index d2d19f3..30de437 100644
--- a/list-variable/cvrp/src/cvrp_bench/solver/ortools/__init__.py
+++ b/list-variable/cvrp/src/cvrp_bench/solver/ortools/__init__.py
@@ -4,18 +4,20 @@
 from pathlib import Path
 
 from cvrp_bench.domain.models import Instance, Solution
+from solverforge_bench.fair_start import (
+    emit_fair_start_witness,
+    make_fair_start_witness,
+    solver_result,
+    witness_from_native_output,
+)
 from solverforge_bench.model import NoSolutionFoundError
+from solverforge_bench.model import SolverResult
 
 _BINARY_PATH = Path(__file__).parent / "target" / "cvrp_ortools"
 _NO_SOLUTION_MESSAGE = "OR-Tools found no CVRP solution"
 
 
-def solve_with_ortools(instance: Instance, time_limit: int) -> Solution:
-    if not _BINARY_PATH.exists():
-        raise RuntimeError(
-            "native OR-Tools solver is not built; run `make build-cvrp-ortools`"
-        )
-
+def solve_with_ortools(instance: Instance, time_limit: int) -> SolverResult:
     payload = {
         "capacity": int(instance.capacity),
         "demand": [int(value) for value in instance.demand.tolist()],
@@ -24,6 +26,18 @@ def solve_with_ortools(instance: Instance, time_limit: int) -> Solution:
             for row in instance.edge_weight.tolist()
         ],
     }
+    witness = make_fair_start_witness(
+        benchmark_name="cvrp",
+        solver="ortools",
+        planning_state="external_solver_model",
+        solver_input=payload,
+    )
+    emit_fair_start_witness(witness)
+    if not _BINARY_PATH.exists():
+        raise RuntimeError(
+            "native OR-Tools solver is not built; run `make build-cvrp-ortools`"
+        )
+
     result = subprocess.run(
         [str(_BINARY_PATH), str(time_limit)],
         input=json.dumps(payload).encode(),
@@ -40,4 +54,14 @@ def solve_with_ortools(instance: Instance, time_limit: int) -> Solution:
         print(stderr, file=sys.stderr, end="")
 
     output = json.loads(result.stdout)
-    return Solution(cost=int(output["cost"]), routes=output["routes"])
+    witness = witness_from_native_output(
+        output,
+        benchmark_name="cvrp",
+        solver="ortools",
+        planning_state="external_solver_model",
+        solver_input=payload,
+    )
+    return solver_result(
+        Solution(cost=int(output["cost"]), routes=output["routes"]),
+        witness,
+    )
diff --git a/list-variable/cvrp/src/cvrp_bench/solver/ortools/main.cc b/list-variable/cvrp/src/cvrp_bench/solver/ortools/main.cc
index bc4b4ef..519c6d7 100644
--- a/list-variable/cvrp/src/cvrp_bench/solver/ortools/main.cc
+++ b/list-variable/cvrp/src/cvrp_bench/solver/ortools/main.cc
@@ -70,6 +70,17 @@ CvrpInstance ParseInput(const std::string& input) {
   return instance;
 }
 
+json::object FairStartWitness() {
+  json::object witness;
+  witness["routing_assignment_hint_present"] = false;
+  witness["adapter_hint_count"] = 0;
+  witness["preliminary_solve_count"] = 0;
+  witness["fallback_solution_enabled"] = false;
+  witness["preassigned_scalar_variables"] = 0;
+  witness["prefilled_list_variables"] = 0;
+  return witness;
+}
+
 json::object Solve(const CvrpInstance& instance, int time_limit_seconds) {
   const int num_nodes = static_cast<int>(instance.demand.size());
   const int num_vehicles = num_nodes;
@@ -131,6 +142,7 @@ json::object Solve(const CvrpInstance& instance, int time_limit_seconds) {
   json::object output;
   output["cost"] = solution->ObjectiveValue();
   output["routes"] = std::move(routes);
+  output["fair_start_witness"] = FairStartWitness();
   return output;
 }
 
diff --git a/list-variable/cvrp/src/cvrp_bench/solver/pyhygese.py b/list-variable/cvrp/src/cvrp_bench/solver/pyhygese.py
index 78a292a..0d87766 100644
--- a/list-variable/cvrp/src/cvrp_bench/solver/pyhygese.py
+++ b/list-variable/cvrp/src/cvrp_bench/solver/pyhygese.py
@@ -1,8 +1,14 @@
 from cvrp_bench.domain.models import Instance, Solution
 import hygese as hgs
+from solverforge_bench.fair_start import (
+    emit_fair_start_witness,
+    make_fair_start_witness,
+    solver_result,
+)
+from solverforge_bench.model import SolverResult
 
 
-def solve_with_pyhygese(instance: Instance, time_limit: int) -> Solution:
+def solve_with_pyhygese(instance: Instance, time_limit: int) -> SolverResult:
     # Simple pyhygese baseline would go here
 
     data = dict()
@@ -18,5 +24,12 @@ def solve_with_pyhygese(instance: Instance, time_limit: int) -> Solution:
     hgs_solver = hgs.Solver(parameters=ap, verbose=True)
 
     # Solve
+    witness = make_fair_start_witness(
+        benchmark_name="cvrp",
+        solver="pyhygese",
+        planning_state="external_solver_model",
+        solver_input=data,
+    )
+    emit_fair_start_witness(witness)
     result = hgs_solver.solve_cvrp(data)
-    return Solution(routes=result.routes, cost=result.cost)
+    return solver_result(Solution(routes=result.routes, cost=result.cost), witness)
diff --git a/list-variable/cvrp/src/cvrp_bench/solver/pyvrp.py b/list-variable/cvrp/src/cvrp_bench/solver/pyvrp.py
index 295a974..898a272 100644
--- a/list-variable/cvrp/src/cvrp_bench/solver/pyvrp.py
+++ b/list-variable/cvrp/src/cvrp_bench/solver/pyvrp.py
@@ -1,8 +1,14 @@
 from cvrp_bench.domain.models import Instance, Solution
 import pyvrp
+from solverforge_bench.fair_start import (
+    emit_fair_start_witness,
+    make_fair_start_witness,
+    solver_result,
+)
+from solverforge_bench.model import SolverResult
 
 
-def solve_with_pyvrp(instance: Instance, time_limit: int) -> Solution:
+def solve_with_pyvrp(instance: Instance, time_limit: int) -> SolverResult:
     """
     Code for solving the CVRP using pyvrp. Code heavily inspired by this documentation of the tool:
     https://pyvrp.org/examples/quick_tutorial.html
@@ -22,8 +28,16 @@ def solve_with_pyvrp(instance: Instance, time_limit: int) -> Solution:
             m.add_edge(frm, to, round(instance.edge_weight[i][j]))
 
     # 2 solve by pyvrp
+    witness = make_fair_start_witness(
+        benchmark_name="cvrp",
+        solver="pyvrp",
+        planning_state="external_solver_model",
+        solver_input=instance,
+    )
+    emit_fair_start_witness(witness)
     res = m.solve(stop=pyvrp.stop.MaxRuntime(time_limit), display=True)  # one second
     # 3 transform pyvrp output to solution object
-    return Solution(
-        routes=[list(route) for route in res.best.routes()], cost=res.cost()
+    return solver_result(
+        Solution(routes=[list(route) for route in res.best.routes()], cost=res.cost()),
+        witness,
     )
diff --git a/list-variable/cvrp/src/cvrp_bench/solver/rustvrp/rustvrp.py b/list-variable/cvrp/src/cvrp_bench/solver/rustvrp/rustvrp.py
index cb7459c..23295e7 100644
--- a/list-variable/cvrp/src/cvrp_bench/solver/rustvrp/rustvrp.py
+++ b/list-variable/cvrp/src/cvrp_bench/solver/rustvrp/rustvrp.py
@@ -4,16 +4,17 @@
 from pathlib import Path
 
 from cvrp_bench.domain.models import Instance, Solution
+from solverforge_bench.fair_start import (
+    emit_fair_start_witness,
+    make_fair_start_witness,
+    solver_result,
+)
+from solverforge_bench.model import SolverResult
 
 _BINARY_PATH = Path(__file__).parent / "target" / "cvrp_rustvrp"
 
 
-def solve_with_rustvrp(instance: Instance, time_limit: int) -> Solution:
-    if not _BINARY_PATH.exists():
-        raise RuntimeError(
-            "native rustvrp solver is not built; run `make build-cvrp-rustvrp`"
-        )
-
+def solve_with_rustvrp(instance: Instance, time_limit: int) -> SolverResult:
     payload = {
         "capacity": int(instance.capacity),
         "demand": [int(value) for value in instance.demand.tolist()],
@@ -22,6 +23,18 @@ def solve_with_rustvrp(instance: Instance, time_limit: int) -> Solution:
             for row in instance.edge_weight.tolist()
         ],
     }
+    witness = make_fair_start_witness(
+        benchmark_name="cvrp",
+        solver="rustvrp",
+        planning_state="external_solver_model",
+        solver_input=payload,
+    )
+    emit_fair_start_witness(witness)
+    if not _BINARY_PATH.exists():
+        raise RuntimeError(
+            "native rustvrp solver is not built; run `make build-cvrp-rustvrp`"
+        )
+
     result = subprocess.run(
         [str(_BINARY_PATH), str(time_limit)],
         input=json.dumps(payload).encode(),
@@ -36,4 +49,7 @@ def solve_with_rustvrp(instance: Instance, time_limit: int) -> Solution:
         print(stderr, file=sys.stderr, end="")
 
     output = json.loads(result.stdout)
-    return Solution(cost=int(output["cost"]), routes=output["routes"])
+    return solver_result(
+        Solution(cost=int(output["cost"]), routes=output["routes"]),
+        witness,
+    )
diff --git a/list-variable/cvrp/src/cvrp_bench/solver/solver.py b/list-variable/cvrp/src/cvrp_bench/solver/solver.py
index 99c0462..14bbc6d 100644
--- a/list-variable/cvrp/src/cvrp_bench/solver/solver.py
+++ b/list-variable/cvrp/src/cvrp_bench/solver/solver.py
@@ -1,12 +1,12 @@
 from pathlib import Path
 from typing import Callable, Iterable
 
-from cvrp_bench.domain.models import Instance, Solution
+from cvrp_bench.domain.models import Instance
 from cvrp_bench.solver.ortools import solve_with_ortools
 from cvrp_bench.solver.pyhygese import solve_with_pyhygese
 from cvrp_bench.solver.pyvrp import solve_with_pyvrp
 from cvrp_bench.solver.vroom import solve_with_vroom
-from solverforge_bench.model import SolverVersion
+from solverforge_bench.model import SolverResult, SolverVersion
 from solverforge_bench.solver_versions import (
     cargo_dependency_version,
     executable_version,
@@ -49,7 +49,7 @@ def _load_solverforge():
 
 
 # Type alias for solver functions
-SolverFn = Callable[[Instance, int], Solution]
+SolverFn = Callable[[Instance, int], SolverResult]
 
 
 def solver_versions(methods: Iterable[str]) -> dict[str, SolverVersion]:
diff --git a/list-variable/cvrp/src/cvrp_bench/solver/solverforge.py b/list-variable/cvrp/src/cvrp_bench/solver/solverforge.py
index 8699e33..a06992a 100644
--- a/list-variable/cvrp/src/cvrp_bench/solver/solverforge.py
+++ b/list-variable/cvrp/src/cvrp_bench/solver/solverforge.py
@@ -3,11 +3,18 @@
 import solverforge_cvrp
 
 from cvrp_bench.domain.models import Instance, Solution
+from solverforge_bench.fair_start import (
+    emit_fair_start_witness,
+    make_fair_start_witness,
+    solver_result,
+    witness_from_native_output,
+)
+from solverforge_bench.model import SolverResult
 
 
-def solve_with_solverforge(instance: Instance, time_limit: int) -> Solution:
+def solve_with_solverforge(instance: Instance, time_limit: int) -> SolverResult:
     """
-    Solve the CVRP using the SolverForge 0.14.1 retained list-variable runtime.
+    Solve the CVRP using the SolverForge 0.15.1 retained list-variable runtime.
 
     The Rust crate keeps the benchmark-facing contract thin:
       - Hard: every customer must be assigned exactly once and every route must
@@ -31,8 +38,24 @@ def solve_with_solverforge(instance: Instance, time_limit: int) -> Solution:
     )
 
     # 2 solve
+    witness = make_fair_start_witness(
+        benchmark_name="cvrp",
+        solver="solverforge",
+        planning_state="empty_list_variables",
+        solver_input=instance_json,
+    )
+    emit_fair_start_witness(witness)
     result_json = solverforge_cvrp.solve_cvrp(instance_json, time_limit)
 
     # 3 transform: routes are already depot-excluded lists of customer indices
     result = json.loads(result_json)
-    return Solution(routes=result["routes"], cost=result["cost"])
+    witness = witness_from_native_output(
+        result,
+        benchmark_name="cvrp",
+        solver="solverforge",
+        planning_state="empty_list_variables",
+        solver_input=instance_json,
+    )
+    return solver_result(
+        Solution(routes=result["routes"], cost=result["cost"]), witness
+    )
diff --git a/list-variable/cvrp/src/cvrp_bench/solver/solverforge/src/lib.rs b/list-variable/cvrp/src/cvrp_bench/solver/solverforge/src/lib.rs
index 85bffb9..300dfcc 100644
--- a/list-variable/cvrp/src/cvrp_bench/solver/solverforge/src/lib.rs
+++ b/list-variable/cvrp/src/cvrp_bench/solver/solverforge/src/lib.rs
@@ -36,6 +36,16 @@ struct InstanceInput {
 struct SolutionOutput {
     routes: Vec<Vec<usize>>,
     cost: i64,
+    fair_start_witness: FairStartWitness,
+}
+
+#[derive(Serialize)]
+struct FairStartWitness {
+    adapter_hint_count: usize,
+    preliminary_solve_count: usize,
+    fallback_solution_enabled: bool,
+    preassigned_scalar_variables: usize,
+    prefilled_list_variables: usize,
 }
 
 fn build_plan(input: InstanceInput, time_limit_secs: u64) -> CvrpPlan {
@@ -86,6 +96,17 @@ fn solve_cvrp(instance_json: &str, time_limit: u64) -> PyResult<String> {
     let input: InstanceInput = serde_json::from_str(instance_json)
         .map_err(|e| pyo3::exceptions::PyValueError::new_err(e.to_string()))?;
     let plan = build_plan(input, time_limit);
+    let fair_start_witness = FairStartWitness {
+        adapter_hint_count: 0,
+        preliminary_solve_count: 0,
+        fallback_solution_enabled: false,
+        preassigned_scalar_variables: 0,
+        prefilled_list_variables: plan
+            .routes
+            .iter()
+            .filter(|route| !route.visits.is_empty())
+            .count(),
+    };
     let (job_id, mut receiver) = MANAGER
         .solve(plan)
         .map_err(|e| pyo3::exceptions::PyRuntimeError::new_err(e.to_string()))?;
@@ -130,7 +151,11 @@ fn solve_cvrp(instance_json: &str, time_limit: u64) -> PyResult<String> {
     let routes = solved.materialized_routes();
     let cost = solved.total_cost();
 
-    let output = SolutionOutput { routes, cost };
+    let output = SolutionOutput {
+        routes,
+        cost,
+        fair_start_witness,
+    };
     serde_json::to_string(&output)
         .map_err(|e| pyo3::exceptions::PyValueError::new_err(e.to_string()))
 }
diff --git a/list-variable/cvrp/src/cvrp_bench/solver/timefold.py b/list-variable/cvrp/src/cvrp_bench/solver/timefold.py
index 601b687..94d7261 100644
--- a/list-variable/cvrp/src/cvrp_bench/solver/timefold.py
+++ b/list-variable/cvrp/src/cvrp_bench/solver/timefold.py
@@ -4,12 +4,18 @@
 from pathlib import Path
 
 from cvrp_bench.domain.models import Instance, Solution
+from solverforge_bench.fair_start import (
+    emit_fair_start_witness,
+    make_fair_start_witness,
+    solver_result,
+)
+from solverforge_bench.model import SolverResult
 
 # Fat JAR produced by: mvn -f <this_dir>/timefold/pom.xml package
 _JAR_PATH = Path(__file__).parent / "timefold" / "target" / "timefold-cvrp.jar"
 
 
-def solve_with_timefold(instance: Instance, time_limit: int) -> Solution:
+def solve_with_timefold(instance: Instance, time_limit: int) -> SolverResult:
     """
     Solve the CVRP using Timefold Solver running on the JVM (Java).
 
@@ -36,6 +42,13 @@ def solve_with_timefold(instance: Instance, time_limit: int) -> Solution:
     )
 
     # 2 solve: call the fat JAR, passing time_limit as CLI arg and instance as stdin
+    witness = make_fair_start_witness(
+        benchmark_name="cvrp",
+        solver="timefold",
+        planning_state="empty_list_variables",
+        solver_input=instance_json,
+    )
+    emit_fair_start_witness(witness)
     result = subprocess.run(
         ["java", "-jar", str(_JAR_PATH), str(time_limit)],
         input=instance_json.encode(),
@@ -51,4 +64,6 @@ def solve_with_timefold(instance: Instance, time_limit: int) -> Solution:
 
     # 3 transform: routes are already depot-excluded lists of customer indices
     output = json.loads(result.stdout)
-    return Solution(routes=output["routes"], cost=output["cost"])
+    return solver_result(
+        Solution(routes=output["routes"], cost=output["cost"]), witness
+    )
diff --git a/list-variable/cvrp/src/cvrp_bench/solver/vroom/__init__.py b/list-variable/cvrp/src/cvrp_bench/solver/vroom/__init__.py
index 5384ddd..169b3ab 100644
--- a/list-variable/cvrp/src/cvrp_bench/solver/vroom/__init__.py
+++ b/list-variable/cvrp/src/cvrp_bench/solver/vroom/__init__.py
@@ -4,16 +4,17 @@
 from pathlib import Path
 
 from cvrp_bench.domain.models import Instance, Solution
+from solverforge_bench.fair_start import (
+    emit_fair_start_witness,
+    make_fair_start_witness,
+    solver_result,
+)
+from solverforge_bench.model import SolverResult
 
 _BINARY_PATH = Path(__file__).parent / "target" / "cvrp_vroom"
 
 
-def solve_with_vroom(instance: Instance, time_limit: int) -> Solution:
-    if not _BINARY_PATH.exists():
-        raise RuntimeError(
-            "native VROOM solver is not built; run `make build-cvrp-vroom`"
-        )
-
+def solve_with_vroom(instance: Instance, time_limit: int) -> SolverResult:
     matrix = [
         [round(float(value)) for value in row] for row in instance.edge_weight.tolist()
     ]
@@ -42,6 +43,18 @@ def solve_with_vroom(instance: Instance, time_limit: int) -> Solution:
             }
         },
     }
+    witness = make_fair_start_witness(
+        benchmark_name="cvrp",
+        solver="vroom",
+        planning_state="external_solver_model",
+        solver_input=payload,
+    )
+    emit_fair_start_witness(witness)
+    if not _BINARY_PATH.exists():
+        raise RuntimeError(
+            "native VROOM solver is not built; run `make build-cvrp-vroom`"
+        )
+
     result = subprocess.run(
         [
             str(_BINARY_PATH),
@@ -77,4 +90,7 @@ def solve_with_vroom(instance: Instance, time_limit: int) -> Solution:
         if customers:
             routes.append(customers)
 
-    return Solution(cost=int(output["summary"]["cost"]), routes=routes)
+    return solver_result(
+        Solution(cost=int(output["summary"]["cost"]), routes=routes),
+        witness,
+    )
diff --git a/migrations/20260528000000_add_fair_start_witness.sql b/migrations/20260528000000_add_fair_start_witness.sql
new file mode 100644
index 0000000..a373a40
--- /dev/null
+++ b/migrations/20260528000000_add_fair_start_witness.sql
@@ -0,0 +1,108 @@
+DROP VIEW latest_benchmark_result_facts;
+DROP VIEW latest_benchmark_runs;
+DROP VIEW benchmark_result_facts;
+
+ALTER TABLE benchmark_results
+    ADD COLUMN fair_start_valid boolean NOT NULL DEFAULT false,
+    ADD COLUMN fair_start_error text,
+    ADD COLUMN fair_start_witness jsonb NOT NULL DEFAULT 'null'::jsonb;
+
+UPDATE benchmark_results
+SET fair_start_error = 'legacy row lacks fair-start witness'
+WHERE fair_start_error IS NULL;
+
+ALTER TABLE benchmark_results
+    ADD CONSTRAINT benchmark_results_fair_start_invalid_has_reason
+        CHECK (fair_start_valid OR fair_start_error IS NOT NULL);
+
+CREATE INDEX benchmark_results_fair_start_valid_idx
+    ON benchmark_results (fair_start_valid);
+
+CREATE INDEX benchmark_results_fair_start_witness_idx
+    ON benchmark_results USING gin (fair_start_witness);
+
+CREATE VIEW benchmark_result_facts AS
+SELECT
+    runs.id AS run_id,
+    runs.run_kind,
+    runs.nightly,
+    runs.release_tag,
+    runs.run_stamp,
+    runs.status AS run_status,
+    runs.result_count,
+    runs.git_commit,
+    runs.git_dirty,
+    runs.created_at AS run_created_at,
+    runs.completed_at AS run_completed_at,
+    runs.log_path,
+    results.row_index,
+    results.benchmark_name,
+    results.benchmark_category,
+    results.dataset,
+    results.dataset_set,
+    results.instance,
+    results.instance_size,
+    results.solver,
+    results.solver_version_id,
+    versions.solver_version,
+    versions.version_source AS solver_version_source,
+    versions.metadata AS solver_version_metadata,
+    results.time_limit_seconds,
+    results.actual_time_seconds,
+    results.overshoot_seconds,
+    results.overshoot_ratio,
+    results.wall_time_over_limit,
+    results.watchdog_limit_seconds,
+    results.watchdog_killed,
+    results.fair_start_valid,
+    results.fair_start_error,
+    results.fair_start_witness,
+    results.run_error,
+    results.solver_stdout_path,
+    results.solver_stderr_path,
+    results.hard_feasible,
+    results.cost,
+    results.reported_cost,
+    results.fresh_cost,
+    results.reference_cost,
+    results.quality_ratio,
+    results.validation_error,
+    results.solution_artifact,
+    results.native_fields,
+    results.row_payload
+FROM benchmark_runs AS runs
+JOIN benchmark_results AS results ON results.run_id = runs.id
+JOIN benchmark_solver_versions AS versions ON versions.id = results.solver_version_id;
+
+CREATE VIEW latest_benchmark_runs AS
+SELECT DISTINCT ON (nightly, run_kind, benchmark_name, release_tag)
+    id,
+    run_kind,
+    nightly,
+    release_tag,
+    run_stamp,
+    status,
+    completed_at,
+    result_count,
+    benchmark_name,
+    benchmark_category,
+    output_path,
+    artifact_dir,
+    log_path,
+    solvers,
+    time_limits_seconds,
+    command_args,
+    repo_root,
+    git_commit,
+    git_dirty,
+    python_version,
+    metadata,
+    created_at
+FROM benchmark_runs
+WHERE status = 'completed'
+ORDER BY nightly, run_kind, benchmark_name, release_tag, completed_at DESC, id DESC;
+
+CREATE VIEW latest_benchmark_result_facts AS
+SELECT facts.*
+FROM benchmark_result_facts AS facts
+JOIN latest_benchmark_runs AS latest ON latest.id = facts.run_id;
diff --git a/scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/ortools/__init__.py b/scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/ortools/__init__.py
index 99f9e4f..a48a31b 100644
--- a/scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/ortools/__init__.py
+++ b/scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/ortools/__init__.py
@@ -5,11 +5,26 @@
 
 from employee_scheduling_bench.domain.models import Assignment, Instance, Solution
 from employee_scheduling_bench.solver.instance_json import serialize_instance
+from solverforge_bench.fair_start import (
+    emit_fair_start_witness,
+    make_fair_start_witness,
+    solver_result,
+    witness_from_native_output,
+)
+from solverforge_bench.model import SolverResult
 
 _BINARY_PATH = Path(__file__).parent / "target" / "employee_scheduling_ortools"
 
 
-def solve_with_ortools(instance: Instance, time_limit: int) -> Solution:
+def solve_with_ortools(instance: Instance, time_limit: int) -> SolverResult:
+    instance_json = serialize_instance(instance)
+    witness = make_fair_start_witness(
+        benchmark_name="employee-scheduling",
+        solver="ortools",
+        planning_state="external_solver_model",
+        solver_input=instance_json,
+    )
+    emit_fair_start_witness(witness)
     if not _BINARY_PATH.exists():
         raise RuntimeError(
             "native OR-Tools solver is not built; run "
@@ -18,7 +33,7 @@ def solve_with_ortools(instance: Instance, time_limit: int) -> Solution:
 
     result = subprocess.run(
         [str(_BINARY_PATH), str(time_limit)],
-        input=serialize_instance(instance).encode(),
+        input=instance_json.encode(),
         capture_output=True,
     )
     stderr = result.stderr.decode()
@@ -30,6 +45,13 @@ def solve_with_ortools(instance: Instance, time_limit: int) -> Solution:
         print(stderr, file=sys.stderr, end="")
 
     output = json.loads(result.stdout)
+    witness = witness_from_native_output(
+        output,
+        benchmark_name="employee-scheduling",
+        solver="ortools",
+        planning_state="external_solver_model",
+        solver_input=instance_json,
+    )
     weekly: list[list[Assignment]] = []
     for week_assignments in output["assignments"]:
         weekly.append(
@@ -45,11 +67,14 @@ def solve_with_ortools(instance: Instance, time_limit: int) -> Solution:
         )
 
     objective = output.get("objective")
-    return Solution(
-        assignments=weekly,
-        cost=objective,
-        reported_cost=objective,
-        fresh_cost=objective,
-        score_delta=0 if objective is not None else None,
-        score_drift=False if objective is not None else None,
+    return solver_result(
+        Solution(
+            assignments=weekly,
+            cost=objective,
+            reported_cost=objective,
+            fresh_cost=objective,
+            score_delta=0 if objective is not None else None,
+            score_drift=False if objective is not None else None,
+        ),
+        witness,
     )
diff --git a/scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/solver.py b/scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/solver.py
index cafd061..cb41f73 100644
--- a/scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/solver.py
+++ b/scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/solver.py
@@ -1,9 +1,9 @@
 from pathlib import Path
 from typing import Callable, Iterable
 
-from employee_scheduling_bench.domain.models import Instance, Solution
+from employee_scheduling_bench.domain.models import Instance
 from employee_scheduling_bench.solver.ortools import solve_with_ortools
-from solverforge_bench.model import SolverVersion
+from solverforge_bench.model import SolverResult, SolverVersion
 from solverforge_bench.solver_versions import (
     cargo_dependency_version,
     executable_version,
@@ -11,7 +11,7 @@
     versions_for_solvers,
 )
 
-SolverFn = Callable[[Instance, int], Solution]
+SolverFn = Callable[[Instance, int], SolverResult]
 AVAILABLE_METHODS = ["solverforge", "timefold", "ortools"]
 _SOLVER_DIR = Path(__file__).resolve().parent
 
diff --git a/scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/solverforge.py b/scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/solverforge.py
index 19917e1..67a68c5 100644
--- a/scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/solverforge.py
+++ b/scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/solverforge.py
@@ -5,18 +5,32 @@
 
 from employee_scheduling_bench.domain.models import Instance, Solution, Assignment
 from employee_scheduling_bench.solver.instance_json import serialize_instance
+from solverforge_bench.fair_start import (
+    emit_fair_start_witness,
+    make_fair_start_witness,
+    solver_result,
+    witness_from_native_output,
+)
+from solverforge_bench.model import SolverResult
 
 SOLVERFORGE_CRATE_DIR = Path(__file__).resolve().parent / "solverforge_nrp"
 
 DAYS = ["Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"]
 
 
-def solve_with_solverforge(instance: Instance, time_limit: int) -> Solution:
+def solve_with_solverforge(instance: Instance, time_limit: int) -> SolverResult:
     instance_json = serialize_instance(instance)
+    witness = make_fair_start_witness(
+        benchmark_name="employee-scheduling",
+        solver="solverforge",
+        planning_state="unassigned_scalar_variables",
+        solver_input=instance_json,
+    )
 
     prev_cwd = os.getcwd()
     os.chdir(SOLVERFORGE_CRATE_DIR)
     try:
+        emit_fair_start_witness(witness)
         result_json = solverforge_nrp.solve_nrp(instance_json, time_limit)
     finally:
         os.chdir(prev_cwd)
@@ -24,8 +38,17 @@ def solve_with_solverforge(instance: Instance, time_limit: int) -> Solution:
     import json
 
     result = json.loads(result_json)
+    witness = witness_from_native_output(
+        result,
+        benchmark_name="employee-scheduling",
+        solver="solverforge",
+        planning_state="unassigned_scalar_variables",
+        solver_input=instance_json,
+    )
     solver_metadata = {
-        key: value for key, value in result.items() if key != "assignments"
+        key: value
+        for key, value in result.items()
+        if key not in {"assignments", "fair_start_witness"}
     }
     weekly = []
     for week_assignments in result["assignments"]:
@@ -41,14 +64,17 @@ def solve_with_solverforge(instance: Instance, time_limit: int) -> Solution:
             )
         weekly.append(week)
 
-    return Solution(
-        assignments=weekly,
-        cost=result.get("fresh_cost", result["cost"]),
-        reported_cost=result.get("reported_cost"),
-        fresh_cost=result.get("fresh_cost"),
-        score_delta=result.get("score_delta"),
-        score_drift=result.get("score_drift"),
-        reported_score=result.get("reported_score"),
-        fresh_score=result.get("fresh_score"),
-        solver_metadata=solver_metadata,
+    return solver_result(
+        Solution(
+            assignments=weekly,
+            cost=result.get("fresh_cost", result["cost"]),
+            reported_cost=result.get("reported_cost"),
+            fresh_cost=result.get("fresh_cost"),
+            score_delta=result.get("score_delta"),
+            score_drift=result.get("score_drift"),
+            reported_score=result.get("reported_score"),
+            fresh_score=result.get("fresh_score"),
+            solver_metadata=solver_metadata,
+        ),
+        witness,
     )
diff --git a/scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/solverforge_nrp/src/lib.rs b/scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/solverforge_nrp/src/lib.rs
index dca75a5..53110f1 100644
--- a/scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/solverforge_nrp/src/lib.rs
+++ b/scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/solverforge_nrp/src/lib.rs
@@ -281,6 +281,13 @@ fn do_solve(instance_json: &str, time_limit: u64) -> Result<String, String> {
         time_limit_secs: time_limit.max(1),
         data: problem_data,
     };
+    let fair_start_witness = serde_json::json!({
+        "adapter_hint_count": 0,
+        "preliminary_solve_count": 0,
+        "fallback_solution_enabled": false,
+        "preassigned_scalar_variables": plan.shifts.iter().filter(|shift| shift.nurse_idx.is_some()).count(),
+        "prefilled_list_variables": 0,
+    });
 
     let (solved, telemetry) = solve(plan, time_limit)?;
 
@@ -384,6 +391,7 @@ fn do_solve(instance_json: &str, time_limit: u64) -> Result<String, String> {
             })).collect::<Vec<_>>(),
         })),
         "constraint_breakdown": constraint_breakdown,
+        "fair_start_witness": fair_start_witness,
     });
 
     serde_json::to_string(&output).map_err(|e| format!("Serialization error: {}", e))
diff --git a/scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/timefold.py b/scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/timefold.py
index 9da7b2a..bd79f49 100644
--- a/scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/timefold.py
+++ b/scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/timefold.py
@@ -5,14 +5,29 @@
 
 from employee_scheduling_bench.domain.models import Assignment, Instance, Solution
 from employee_scheduling_bench.solver.instance_json import serialize_instance
+from solverforge_bench.fair_start import (
+    emit_fair_start_witness,
+    make_fair_start_witness,
+    solver_result,
+    witness_from_native_output,
+)
+from solverforge_bench.model import SolverResult
 
 _JAR_PATH = Path(__file__).parent / "timefold" / "target" / "timefold-nrp.jar"
 
 
-def solve_with_timefold(instance: Instance, time_limit: int) -> Solution:
+def solve_with_timefold(instance: Instance, time_limit: int) -> SolverResult:
+    instance_json = serialize_instance(instance)
+    witness = make_fair_start_witness(
+        benchmark_name="employee-scheduling",
+        solver="timefold",
+        planning_state="unassigned_scalar_variables",
+        solver_input=instance_json,
+    )
+    emit_fair_start_witness(witness)
     result = subprocess.run(
         ["java", "-jar", str(_JAR_PATH), str(time_limit)],
-        input=serialize_instance(instance).encode(),
+        input=instance_json.encode(),
         capture_output=True,
     )
     stderr = result.stderr.decode()
@@ -24,6 +39,13 @@ def solve_with_timefold(instance: Instance, time_limit: int) -> Solution:
         print(stderr, file=sys.stderr, end="")
 
     output = json.loads(result.stdout)
+    witness = witness_from_native_output(
+        output,
+        benchmark_name="employee-scheduling",
+        solver="timefold",
+        planning_state="unassigned_scalar_variables",
+        solver_input=instance_json,
+    )
     weekly: list[list[Assignment]] = []
     for week_assignments in output["assignments"]:
         weekly.append(
@@ -38,11 +60,14 @@ def solve_with_timefold(instance: Instance, time_limit: int) -> Solution:
             ]
         )
 
-    return Solution(
-        assignments=weekly,
-        cost=output["cost"],
-        reported_cost=output["cost"],
-        fresh_cost=output["cost"],
-        score_delta=0,
-        score_drift=False,
+    return solver_result(
+        Solution(
+            assignments=weekly,
+            cost=output["cost"],
+            reported_cost=output["cost"],
+            fresh_cost=output["cost"],
+            score_delta=0,
+            score_drift=False,
+        ),
+        witness,
     )
diff --git a/scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/timefold/src/main/java/com/solverforgebench/nrp/Main.java b/scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/timefold/src/main/java/com/solverforgebench/nrp/Main.java
index 35082e3..74d9181 100644
--- a/scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/timefold/src/main/java/com/solverforgebench/nrp/Main.java
+++ b/scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/timefold/src/main/java/com/solverforgebench/nrp/Main.java
@@ -135,10 +135,30 @@ static class AssignmentOutput {
     static class NrpOutput {
         public List<List<AssignmentOutput>> assignments;
         public int cost;
+        @JsonProperty("fair_start_witness")
+        public FairStartWitness fairStartWitness;
 
-        NrpOutput(List<List<AssignmentOutput>> assignments, int cost) {
+        NrpOutput(List<List<AssignmentOutput>> assignments, int cost, FairStartWitness fairStartWitness) {
             this.assignments = assignments;
             this.cost = cost;
+            this.fairStartWitness = fairStartWitness;
+        }
+    }
+
+    static class FairStartWitness {
+        @JsonProperty("adapter_hint_count")
+        public int adapterHintCount = 0;
+        @JsonProperty("preliminary_solve_count")
+        public int preliminarySolveCount = 0;
+        @JsonProperty("fallback_solution_enabled")
+        public boolean fallbackSolutionEnabled = false;
+        @JsonProperty("preassigned_scalar_variables")
+        public int preassignedScalarVariables;
+        @JsonProperty("prefilled_list_variables")
+        public int prefilledListVariables = 0;
+
+        FairStartWitness(int preassignedScalarVariables) {
+            this.preassignedScalarVariables = preassignedScalarVariables;
         }
     }
 
@@ -250,6 +270,7 @@ public static void main(String[] args) throws Exception {
         }
 
         NurseRoster problem = new NurseRoster(nurses, assignments);
+        FairStartWitness fairStartWitness = fairStartWitness(problem);
         SolverConfig solverConfig = new SolverConfig()
                 .withSolutionClass(NurseRoster.class)
                 .withEntityClasses(ShiftAssignment.class)
@@ -280,7 +301,17 @@ public static void main(String[] args) throws Exception {
         }
 
         int cost = solution.getScore() == null ? 0 : Math.toIntExact(-solution.getScore().softScore());
-        mapper.writeValue(System.out, new NrpOutput(weekly, cost));
+        mapper.writeValue(System.out, new NrpOutput(weekly, cost, fairStartWitness));
+    }
+
+    private static FairStartWitness fairStartWitness(NurseRoster problem) {
+        int preassigned = 0;
+        for (ShiftAssignment assignment : problem.getAssignments()) {
+            if (assignment.getNurse() != null) {
+                preassigned++;
+            }
+        }
+        return new FairStartWitness(preassigned);
     }
 
     private static List<Integer> forbiddenPredecessors(List<ForbiddenInput> forbidden, int shiftTypeIdx) {
diff --git a/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/ortools/__init__.py b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/ortools/__init__.py
index 6d565d5..f2816f1 100644
--- a/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/ortools/__init__.py
+++ b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/ortools/__init__.py
@@ -11,11 +11,26 @@
     Solution,
 )
 from job_shop_bench.solver.instance_json import serialize_instance
+from solverforge_bench.fair_start import (
+    emit_fair_start_witness,
+    make_fair_start_witness,
+    solver_result,
+    witness_from_native_output,
+)
+from solverforge_bench.model import SolverResult
 
 _BINARY_PATH = Path(__file__).parent / "target" / "job_shop_scheduling_ortools"
 
 
-def solve_with_ortools(instance: JobShopInstance, time_limit: int) -> Solution:
+def solve_with_ortools(instance: JobShopInstance, time_limit: int) -> SolverResult:
+    instance_json = serialize_instance(instance)
+    witness = make_fair_start_witness(
+        benchmark_name="job-shop-scheduling",
+        solver="ortools",
+        planning_state="external_solver_model",
+        solver_input=instance_json,
+    )
+    emit_fair_start_witness(witness)
     if not _BINARY_PATH.exists():
         raise RuntimeError(
             "native OR-Tools solver is not built; run "
@@ -24,7 +39,7 @@ def solve_with_ortools(instance: JobShopInstance, time_limit: int) -> Solution:
 
     result = subprocess.run(
         [str(_BINARY_PATH), str(time_limit)],
-        input=serialize_instance(instance).encode(),
+        input=instance_json.encode(),
         capture_output=True,
     )
     stderr = result.stderr.decode()
@@ -36,16 +51,26 @@ def solve_with_ortools(instance: JobShopInstance, time_limit: int) -> Solution:
         print(stderr, file=sys.stderr, end="")
 
     output = json.loads(result.stdout)
-    return Solution(
-        operations=[
-            ScheduledOperation(
-                job_id=op["job_id"],
-                op_index=op["op_index"],
-                machine_id=op["machine_id"],
-                start=op["start"],
-                duration=op["duration"],
-            )
-            for op in output["operations"]
-        ],
-        reported_makespan=output["reported_makespan"],
+    witness = witness_from_native_output(
+        output,
+        benchmark_name="job-shop-scheduling",
+        solver="ortools",
+        planning_state="external_solver_model",
+        solver_input=instance_json,
+    )
+    return solver_result(
+        Solution(
+            operations=[
+                ScheduledOperation(
+                    job_id=op["job_id"],
+                    op_index=op["op_index"],
+                    machine_id=op["machine_id"],
+                    start=op["start"],
+                    duration=op["duration"],
+                )
+                for op in output["operations"]
+            ],
+            reported_makespan=output["reported_makespan"],
+        ),
+        witness,
     )
diff --git a/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/ortools/main.cc b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/ortools/main.cc
index 515106a..ad8161b 100644
--- a/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/ortools/main.cc
+++ b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/ortools/main.cc
@@ -82,6 +82,18 @@ std::string OpName(const Operation& op) {
   return "j" + std::to_string(op.job_id) + "_o" + std::to_string(op.op_index);
 }
 
+json::object FairStartWitness(const sat::CpModelProto& proto) {
+  json::object witness;
+  witness["cp_sat_solution_hint_vars"] = proto.solution_hint().vars_size();
+  witness["cp_sat_solution_hint_values"] = proto.solution_hint().values_size();
+  witness["adapter_hint_count"] = 0;
+  witness["preliminary_solve_count"] = 0;
+  witness["fallback_solution_enabled"] = false;
+  witness["preassigned_scalar_variables"] = 0;
+  witness["prefilled_list_variables"] = 0;
+  return witness;
+}
+
 json::object Solve(const InstancePayload& payload, double time_limit) {
   const int horizon = std::max(
       1, std::accumulate(payload.operations.begin(), payload.operations.end(), 0,
@@ -144,9 +156,11 @@ json::object Solve(const InstancePayload& payload, double time_limit) {
   parameters.set_random_seed(1);
   parameters.set_log_search_progress(false);
   solver_model.Add(sat::NewSatParameters(parameters));
+  const sat::CpModelProto proto = model.Build();
+  const json::object fair_start_witness = FairStartWitness(proto);
 
   const sat::CpSolverResponse response =
-      sat::SolveCpModel(model.Build(), &solver_model);
+      sat::SolveCpModel(proto, &solver_model);
   if (response.status() != sat::CpSolverStatus::OPTIMAL &&
       response.status() != sat::CpSolverStatus::FEASIBLE) {
     throw std::runtime_error("OR-Tools CP-SAT found no feasible solution");
@@ -168,6 +182,7 @@ json::object Solve(const InstancePayload& payload, double time_limit) {
   output["operations"] = operations;
   output["reported_makespan"] =
       static_cast<int>(sat::SolutionIntegerValue(response, makespan));
+  output["fair_start_witness"] = fair_start_witness;
   return output;
 }
 
diff --git a/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solver.py b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solver.py
index 386bcc5..74649e7 100644
--- a/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solver.py
+++ b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solver.py
@@ -3,9 +3,9 @@
 from pathlib import Path
 from typing import Callable
 
-from job_shop_bench.domain.models import JobShopInstance, Solution
+from job_shop_bench.domain.models import JobShopInstance
 from job_shop_bench.solver.ortools import solve_with_ortools
-from solverforge_bench.model import SolverVersion
+from solverforge_bench.model import SolverResult, SolverVersion
 from solverforge_bench.solver_versions import (
     cargo_dependency_version,
     executable_version,
@@ -19,7 +19,7 @@
 
 def create_solver(
     method: str, time_limit: int
-) -> Callable[[JobShopInstance, int], Solution]:
+) -> Callable[[JobShopInstance, int], SolverResult]:
     if method not in AVAILABLE_METHODS:
         raise ValueError(
             f"Unknown method '{method}'. Available: {', '.join(AVAILABLE_METHODS)}"
diff --git a/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge.py b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge.py
index facedde..6962570 100644
--- a/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge.py
+++ b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge.py
@@ -12,31 +12,55 @@
     Solution,
 )
 from job_shop_bench.solver.instance_json import serialize_instance
+from solverforge_bench.fair_start import (
+    emit_fair_start_witness,
+    make_fair_start_witness,
+    solver_result,
+    witness_from_native_output,
+)
+from solverforge_bench.model import SolverResult
 
 SOLVERFORGE_CRATE_DIR = Path(__file__).resolve().parent / "solverforge_jssp"
 
 
-def solve_with_solverforge(instance: JobShopInstance, time_limit: int) -> Solution:
+def solve_with_solverforge(instance: JobShopInstance, time_limit: int) -> SolverResult:
     instance_json = serialize_instance(instance)
+    witness = make_fair_start_witness(
+        benchmark_name="job-shop-scheduling",
+        solver="solverforge",
+        planning_state="empty_list_variables",
+        solver_input=instance_json,
+    )
 
     prev_cwd = os.getcwd()
     os.chdir(SOLVERFORGE_CRATE_DIR)
     try:
+        emit_fair_start_witness(witness)
         result_json = solverforge_jssp.solve_jssp(instance_json, time_limit)
     finally:
         os.chdir(prev_cwd)
 
     output = json.loads(result_json)
-    return Solution(
-        operations=[
-            ScheduledOperation(
-                job_id=op["job_id"],
-                op_index=op["op_index"],
-                machine_id=op["machine_id"],
-                start=op["start"],
-                duration=op["duration"],
-            )
-            for op in output["operations"]
-        ],
-        reported_makespan=output["reported_makespan"],
+    witness = witness_from_native_output(
+        output,
+        benchmark_name="job-shop-scheduling",
+        solver="solverforge",
+        planning_state="empty_list_variables",
+        solver_input=instance_json,
+    )
+    return solver_result(
+        Solution(
+            operations=[
+                ScheduledOperation(
+                    job_id=op["job_id"],
+                    op_index=op["op_index"],
+                    machine_id=op["machine_id"],
+                    start=op["start"],
+                    duration=op["duration"],
+                )
+                for op in output["operations"]
+            ],
+            reported_makespan=output["reported_makespan"],
+        ),
+        witness,
     )
diff --git a/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold.py b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold.py
index 70a3e26..28f2c30 100644
--- a/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold.py
+++ b/scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold.py
@@ -11,14 +11,29 @@
     Solution,
 )
 from job_shop_bench.solver.instance_json import serialize_instance
+from solverforge_bench.fair_start import (
+    emit_fair_start_witness,
+    make_fair_start_witness,
+    solver_result,
+    witness_from_native_output,
+)
+from solverforge_bench.model import SolverResult
 
 _JAR_PATH = Path(__file__).parent / "timefold" / "target" / "timefold-jssp.jar"
 
 
-def solve_with_timefold(instance: JobShopInstance, time_limit: int) -> Solution:
+def solve_with_timefold(instance: JobShopInstance, time_limit: int) -> SolverResult:
+    instance_json = serialize_instance(instance)
+    witness = make_fair_start_witness(
+        benchmark_name="job-shop-scheduling",
+        solver="timefold",
+        planning_state="empty_list_variables",
+        solver_input=instance_json,
+    )
+    emit_fair_start_witness(witness)
     result = subprocess.run(
         ["java", "-jar", str(_JAR_PATH), str(time_limit)],
-        input=serialize_instance(instance).encode(),
+        input=instance_json.encode(),
         capture_output=True,
     )
     stderr = result.stderr.decode()
@@ -30,16 +45,26 @@ def solve_with_timefold(instance: JobShopInstance, time_limit: int) -> Solution:
         print(stderr, file=sys.stderr, end="")
 
     output = json.loads(result.stdout)
-    return Solution(
-        operations=[
-            ScheduledOperation(
-                job_id=op["job_id"],
-                op_index=op["op_index"],
-                machine_id=op["machine_id"],
-                start=op["start"],
-                duration=op["duration"],
-            )
-            for op in output["operations"]
-        ],
-        reported_makespan=output["reported_makespan"],
+    witness = witness_from_native_output(
+        output,
+        benchmark_name="job-shop-scheduling",
+        solver="timefold",
+        planning_state="empty_list_variables",
+        solver_input=instance_json,
+    )
+    return solver_result(
+        Solution(
+            operations=[
+                ScheduledOperation(
+                    job_id=op["job_id"],
+                    op_index=op["op_index"],
+                    machine_id=op["machine_id"],
+                    start=op["start"],
+                    duration=op["duration"],
+                )
+                for op in output["operations"]
+            ],
+            reported_makespan=output["reported_makespan"],
+        ),
+        witness,
     )
diff --git a/scripts/normalize_results.py b/scripts/normalize_results.py
index 6cb5831..6434339 100755
--- a/scripts/normalize_results.py
+++ b/scripts/normalize_results.py
@@ -4,6 +4,7 @@
 from __future__ import annotations
 
 import argparse
+import json
 import sys
 from datetime import datetime, timezone
 from pathlib import Path
@@ -96,6 +97,9 @@ def normalize_global_row(
         "wall_time_over_limit": as_bool(row.get("wall_time_over_limit")),
         "watchdog_limit_seconds": as_float(row.get("watchdog_limit_seconds")),
         "watchdog_killed": as_bool(row.get("watchdog_killed")),
+        "fair_start_valid": as_bool(row.get("fair_start_valid")),
+        "fair_start_error": blank_to_none(row.get("fair_start_error")),
+        "fair_start_witness": as_json(row.get("fair_start_witness")),
         "run_error": blank_to_none(row.get("run_error")),
         "solver_stdout_path": blank_to_none(row.get("solver_stdout_path")),
         "solver_stderr_path": blank_to_none(row.get("solver_stderr_path")),
@@ -161,5 +165,12 @@ def as_bool(value: str | None) -> bool | None:
     return value.lower() in {"1", "true", "yes"}
 
 
+def as_json(value: str | None) -> object | None:
+    value = blank_to_none(value)
+    if value is None:
+        return None
+    return json.loads(value)
+
+
 if __name__ == "__main__":
     main()
diff --git a/scripts/verify_fair_start.py b/scripts/verify_fair_start.py
new file mode 100644
index 0000000..8fdd344
--- /dev/null
+++ b/scripts/verify_fair_start.py
@@ -0,0 +1,437 @@
+#!/usr/bin/env python3
+"""Verify benchmark solvers start from fair, unassigned planning state."""
+
+from __future__ import annotations
+
+import argparse
+from dataclasses import dataclass
+import os
+from pathlib import Path
+import sys
+
+
+REPO_ROOT = Path(__file__).resolve().parents[1]
+
+SOLVER_ROOTS = [
+    REPO_ROOT / "list-variable/cvrp/src/cvrp_bench/solver",
+    REPO_ROOT
+    / "scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver",
+    REPO_ROOT / "scalar-variable/job-shop-scheduling/src/job_shop_bench/solver",
+]
+
+SOURCE_SUFFIXES = {
+    ".py",
+    ".rs",
+    ".cc",
+    ".cpp",
+    ".h",
+    ".hpp",
+    ".java",
+    ".toml",
+}
+
+SKIPPED_PARTS = {
+    "target",
+    "build",
+    "CMakeFiles",
+    ".venv",
+    "__pycache__",
+    ".mypy_cache",
+    ".pytest_cache",
+}
+
+BANNED_PATTERNS = [
+    "AddHint(",
+    "BuildGreedyHint",
+    "SolveHardSeed",
+    "hard_seed",
+    "greedy_hint",
+    "repair_hint",
+    "initial_solution",
+    "initialSolution",
+    "warm_start",
+    "warmStart",
+    "read_solution(",
+    "load_solution(",
+    "reference_solution",
+]
+
+PYTHON_SOLVER_WRAPPERS = [
+    REPO_ROOT / "list-variable/cvrp/src/cvrp_bench/solver/pyvrp.py",
+    REPO_ROOT / "list-variable/cvrp/src/cvrp_bench/solver/pyhygese.py",
+    REPO_ROOT / "list-variable/cvrp/src/cvrp_bench/solver/solverforge.py",
+    REPO_ROOT / "list-variable/cvrp/src/cvrp_bench/solver/timefold.py",
+    REPO_ROOT / "list-variable/cvrp/src/cvrp_bench/solver/ortools/__init__.py",
+    REPO_ROOT / "list-variable/cvrp/src/cvrp_bench/solver/vroom/__init__.py",
+    REPO_ROOT / "list-variable/cvrp/src/cvrp_bench/solver/rustvrp/rustvrp.py",
+    REPO_ROOT
+    / "scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/solverforge.py",
+    REPO_ROOT
+    / "scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/timefold.py",
+    REPO_ROOT
+    / "scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/ortools/__init__.py",
+    REPO_ROOT
+    / "scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge.py",
+    REPO_ROOT
+    / "scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold.py",
+    REPO_ROOT
+    / "scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/ortools/__init__.py",
+]
+
+
+@dataclass(frozen=True)
+class Violation:
+    path: Path
+    line: int
+    message: str
+
+    def format(self) -> str:
+        try:
+            display_path = self.path.relative_to(REPO_ROOT)
+        except ValueError:
+            display_path = self.path
+        return f"{display_path}:{self.line}: {self.message}"
+
+
+def main() -> int:
+    args = parse_args()
+    violations: list[Violation] = []
+    violations.extend(scan_banned_patterns())
+    violations.extend(check_positive_start_shapes())
+    violations.extend(check_runtime_witness_wrappers())
+    if args.run_id:
+        violations.extend(check_postgres_rows(args.run_id, args.database_url))
+
+    if violations:
+        for violation in violations:
+            print(violation.format())
+        return 1
+
+    print("fair-start verification passed")
+    return 0
+
+
+def parse_args() -> argparse.Namespace:
+    parser = argparse.ArgumentParser(
+        description="Verify benchmark solvers start from fair planning state."
+    )
+    parser.add_argument(
+        "--run-id",
+        help="Optional PostgreSQL benchmark run id whose rows must all carry a valid witness.",
+    )
+    parser.add_argument(
+        "--database-url",
+        default=(
+            os.environ.get("BENCH_DATABASE_URL")
+            or os.environ.get("DATABASE_URL")
+            or "postgresql://postgres@localhost/solverforge_bench"
+        ),
+        help="PostgreSQL URL used with --run-id.",
+    )
+    return parser.parse_args()
+
+
+def scan_banned_patterns() -> list[Violation]:
+    violations: list[Violation] = []
+    for root in SOLVER_ROOTS:
+        if not root.exists():
+            violations.append(Violation(root, 1, "solver root does not exist"))
+            continue
+        for path in sorted(root.rglob("*")):
+            if not should_scan(path):
+                continue
+            for line_number, line in enumerate(path.read_text().splitlines(), 1):
+                for pattern in BANNED_PATTERNS:
+                    if pattern in line:
+                        violations.append(
+                            Violation(
+                                path,
+                                line_number,
+                                f"forbidden adapter-side fair-start pattern: {pattern}",
+                            )
+                        )
+    return violations
+
+
+def should_scan(path: Path) -> bool:
+    if not path.is_file():
+        return False
+    if path.suffix not in SOURCE_SUFFIXES:
+        return False
+    return not any(part in SKIPPED_PARTS for part in path.parts)
+
+
+def check_positive_start_shapes() -> list[Violation]:
+    violations: list[Violation] = []
+
+    violations.extend(
+        require_contains(
+            REPO_ROOT
+            / "list-variable/cvrp/src/cvrp_bench/solver/solverforge/src/lib.rs",
+            "visits: Vec::new()",
+            "CVRP SolverForge routes must start empty",
+        )
+    )
+    violations.extend(
+        require_contains(
+            REPO_ROOT
+            / "list-variable/cvrp/src/cvrp_bench/solver/timefold/src/main/java/com/cvrpbenchmark/domain/Vehicle.java",
+            "this.visits = new ArrayList<>();",
+            "CVRP Timefold vehicle visits must start empty",
+        )
+    )
+    violations.extend(
+        require_contains(
+            REPO_ROOT
+            / "scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/solverforge_nrp/src/lib.rs",
+            "nurse_idx: None",
+            "employee SolverForge shifts must start unassigned",
+        )
+    )
+    violations.extend(
+        require_contains(
+            REPO_ROOT
+            / "scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/solverforge_nrp/src/domain.rs",
+            "allows_unassigned = true",
+            "employee SolverForge shift variable must allow unassigned starts",
+        )
+    )
+    violations.extend(check_employee_timefold_constructor())
+    violations.extend(
+        require_contains(
+            REPO_ROOT
+            / "scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/solverforge_jssp/src/lib.rs",
+            "operations: Vec::new()",
+            "JSSP SolverForge machine sequences must start empty",
+        )
+    )
+    violations.extend(check_jssp_timefold_constructor())
+
+    return violations
+
+
+def check_runtime_witness_wrappers() -> list[Violation]:
+    violations: list[Violation] = []
+    for path in PYTHON_SOLVER_WRAPPERS:
+        violations.extend(
+            require_contains(
+                path,
+                "SolverResult",
+                "solver wrapper must declare the SolverResult contract",
+            )
+        )
+        violations.extend(
+            require_contains(
+                path,
+                "emit_fair_start_witness(witness)",
+                "solver wrapper must emit a runtime fair-start witness before solve",
+            )
+        )
+        violations.extend(
+            require_contains(
+                path,
+                "solver_result(",
+                "solver wrapper must return SolverResult",
+            )
+        )
+
+    violations.extend(
+        require_contains(
+            REPO_ROOT
+            / "scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/ortools/main.cc",
+            "proto.solution_hint().vars_size()",
+            "employee OR-Tools must inspect CP-SAT hint fields in native witness",
+        )
+    )
+    violations.extend(
+        require_contains(
+            REPO_ROOT
+            / "scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/ortools/main.cc",
+            "proto.solution_hint().vars_size()",
+            "JSSP OR-Tools must inspect CP-SAT hint fields in native witness",
+        )
+    )
+    return violations
+
+
+def check_postgres_rows(run_id: str, database_url: str) -> list[Violation]:
+    try:
+        import psycopg
+    except ModuleNotFoundError as exc:
+        return [
+            Violation(
+                REPO_ROOT / "pyproject.toml",
+                1,
+                f"PostgreSQL row verification requires psycopg: {exc}",
+            )
+        ]
+
+    try:
+        with psycopg.connect(database_url) as conn:
+            with conn.cursor() as cur:
+                cur.execute(
+                    """
+                    SELECT
+                        count(*),
+                        count(*) FILTER (WHERE fair_start_valid),
+                        count(*) FILTER (
+                            WHERE fair_start_witness IS NOT NULL
+                              AND fair_start_witness <> 'null'::jsonb
+                        ),
+                        array_agg(
+                            row_index || ':' || solver || ':' ||
+                            coalesce(fair_start_error, 'missing error')
+                            ORDER BY row_index
+                        ) FILTER (WHERE NOT fair_start_valid)
+                    FROM benchmark_results
+                    WHERE run_id = %s
+                    """,
+                    (run_id,),
+                )
+                total, valid, witnessed, invalid = cur.fetchone()
+    except Exception as exc:
+        return [
+            Violation(
+                REPO_ROOT / "migrations",
+                1,
+                f"PostgreSQL row verification failed for run {run_id}: {exc}",
+            )
+        ]
+
+    if total == 0:
+        return [
+            Violation(
+                REPO_ROOT / "migrations",
+                1,
+                f"PostgreSQL run {run_id} has no benchmark rows",
+            )
+        ]
+    if valid != total or witnessed != total:
+        invalid_rows = ", ".join(invalid or [])
+        return [
+            Violation(
+                REPO_ROOT / "migrations",
+                1,
+                (
+                    f"PostgreSQL run {run_id} has invalid fair-start rows: "
+                    f"valid={valid}/{total}, witnessed={witnessed}/{total}; "
+                    f"{invalid_rows}"
+                ),
+            )
+        ]
+    return []
+
+
+def require_contains(path: Path, needle: str, message: str) -> list[Violation]:
+    if not path.exists():
+        return [Violation(path, 1, f"{message}: file missing")]
+    text = path.read_text()
+    if needle not in text:
+        return [Violation(path, 1, f"{message}: missing {needle!r}")]
+    return []
+
+
+def check_employee_timefold_constructor() -> list[Violation]:
+    path = (
+        REPO_ROOT
+        / "scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/timefold/src/main/java/com/solverforgebench/nrp/domain/ShiftAssignment.java"
+    )
+    violations = require_contains(
+        path,
+        "private NurseFact nurse;",
+        "employee Timefold planning variable must exist",
+    )
+    if violations or not path.exists():
+        return violations
+
+    text = path.read_text()
+    constructor_body = extract_between(
+        text,
+        "public ShiftAssignment(",
+        "\n    public int getId()",
+    )
+    if constructor_body is None:
+        return [
+            Violation(
+                path,
+                1,
+                "employee Timefold constructor boundary not found for fair-start check",
+            )
+        ]
+    nurse_assignment = constructor_assignment(constructor_body, "nurse")
+    if nurse_assignment is not None:
+        violations.append(
+            Violation(
+                path,
+                line_number_for(text, nurse_assignment),
+                "employee Timefold constructor must not preload nurse assignments",
+            )
+        )
+    return violations
+
+
+def check_jssp_timefold_constructor() -> list[Violation]:
+    path = (
+        REPO_ROOT
+        / "scalar-variable/job-shop-scheduling/src/job_shop_bench/solver/timefold/src/main/java/com/solverforgebench/jssp/domain/MachineSequence.java"
+    )
+    violations = require_contains(
+        path,
+        "private List<OperationAssignment> operations = new ArrayList<>();",
+        "JSSP Timefold machine operations must start empty",
+    )
+    if violations or not path.exists():
+        return violations
+
+    text = path.read_text()
+    constructor_body = extract_between(
+        text,
+        "public MachineSequence(int id, List<OperationAssignment> eligibleOperations)",
+        "\n    public int getId()",
+    )
+    if constructor_body is None:
+        return [
+            Violation(
+                path,
+                1,
+                "JSSP Timefold constructor boundary not found for fair-start check",
+            )
+        ]
+    operations_assignment = constructor_assignment(constructor_body, "operations")
+    if operations_assignment is not None:
+        violations.append(
+            Violation(
+                path,
+                line_number_for(text, operations_assignment),
+                "JSSP Timefold constructor must not preload machine operations",
+            )
+        )
+    return violations
+
+
+def extract_between(text: str, start: str, end: str) -> str | None:
+    start_idx = text.find(start)
+    if start_idx < 0:
+        return None
+    end_idx = text.find(end, start_idx)
+    if end_idx < 0:
+        return None
+    return text[start_idx:end_idx]
+
+
+def constructor_assignment(text: str, field_name: str) -> str | None:
+    for candidate in (f"this.{field_name} =", f"this.{field_name}="):
+        if candidate in text:
+            return candidate
+    return None
+
+
+def line_number_for(text: str, needle: str) -> int:
+    index = text.find(needle)
+    if index < 0:
+        return 1
+    return text.count("\n", 0, index) + 1
+
+
+if __name__ == "__main__":
+    sys.exit(main())
diff --git a/src/solverforge_bench/csv.py b/src/solverforge_bench/csv.py
index f780b11..b5ee384 100644
--- a/src/solverforge_bench/csv.py
+++ b/src/solverforge_bench/csv.py
@@ -3,6 +3,7 @@
 from __future__ import annotations
 
 import csv
+import json
 from pathlib import Path
 from typing import Any, Iterable
 
@@ -23,6 +24,9 @@
     "wall_time_over_limit",
     "watchdog_limit_seconds",
     "watchdog_killed",
+    "fair_start_valid",
+    "fair_start_error",
+    "fair_start_witness",
     "run_error",
     "solver_stdout_path",
     "solver_stderr_path",
@@ -91,4 +95,6 @@ def _csv_value(value: Any) -> Any:
         return ""
     if isinstance(value, bool):
         return "true" if value else "false"
+    if isinstance(value, dict | list):
+        return json.dumps(value, sort_keys=True, separators=(",", ":"))
     return value
diff --git a/src/solverforge_bench/etl.py b/src/solverforge_bench/etl.py
index 0b1f08f..806ad50 100644
--- a/src/solverforge_bench/etl.py
+++ b/src/solverforge_bench/etl.py
@@ -27,6 +27,9 @@
     "wall_time_over_limit",
     "watchdog_limit_seconds",
     "watchdog_killed",
+    "fair_start_valid",
+    "fair_start_error",
+    "fair_start_witness",
     "run_error",
     "solver_stdout_path",
     "solver_stderr_path",
@@ -96,6 +99,9 @@ def _postgres_record(
         "wall_time_over_limit": row.wall_time_over_limit,
         "watchdog_limit_seconds": row.watchdog_limit_seconds,
         "watchdog_killed": row.watchdog_killed,
+        "fair_start_valid": row.fair_start_valid,
+        "fair_start_error": row.fair_start_error,
+        "fair_start_witness": row.fair_start_witness,
         "run_error": row.run_error,
         "solver_stdout_path": row.solver_stdout_path,
         "solver_stderr_path": row.solver_stderr_path,
diff --git a/src/solverforge_bench/execution.py b/src/solverforge_bench/execution.py
index 96e935f..f9d6578 100644
--- a/src/solverforge_bench/execution.py
+++ b/src/solverforge_bench/execution.py
@@ -11,6 +11,14 @@
 from pathlib import Path
 from typing import Any, Callable
 
+from solverforge_bench.fair_start import (
+    FairStartViolationError,
+    fair_start_recorder,
+    validate_fair_start_witness,
+    validate_solver_result,
+    witness_from_payload,
+    witness_to_payload,
+)
 from solverforge_bench.logging import capture_output
 from solverforge_bench.model import NoSolutionFoundError, SolverRun
 
@@ -32,6 +40,7 @@ def watchdog_limit_seconds(
 
 def run_solver(
     *,
+    benchmark_name: str,
     solver_name: str,
     solver_factory: Callable[..., Callable[[Any, int], Any]],
     solution_model: type,
@@ -46,10 +55,11 @@ def run_solver(
     """Pass the benchmark budget to the solver and wait up to watchdog_seconds."""
 
     ctx = _process_context()
-    output_queue = ctx.Queue(maxsize=1)
+    output_queue = ctx.Queue()
     process = ctx.Process(
         target=_run_solver_child,
         args=(
+            benchmark_name,
             solver_name,
             solver_factory,
             instance,
@@ -69,6 +79,12 @@ def run_solver(
     if process.is_alive():
         _terminate_process_tree(process)
         elapsed = time.monotonic() - started
+        message, fair_start_witness = _collect_child_messages(output_queue)
+        fair_start_error = (
+            None
+            if fair_start_witness is not None
+            else f"{solver_name} emitted no fair-start witness before watchdog kill"
+        )
         return SolverRun(
             solver=solver_name,
             time_limit_seconds=time_limit_seconds,
@@ -76,6 +92,9 @@ def run_solver(
             watchdog_limit_seconds=watchdog_seconds,
             watchdog_killed=True,
             solution=None,
+            fair_start_witness=fair_start_witness,
+            fair_start_valid=fair_start_error is None,
+            fair_start_error=fair_start_error,
             run_error=(
                 f"WatchdogTimeout: {solver_name} exceeded watchdog limit "
                 f"({elapsed:.6f}s > {watchdog_seconds:.6f}s)"
@@ -85,9 +104,13 @@ def run_solver(
             solver_stderr_path=str(stderr_path) if stderr_path else None,
         )
 
-    try:
-        message = output_queue.get_nowait()
-    except queue_module.Empty:
+    message, fair_start_witness = _collect_child_messages(output_queue)
+    if message is None:
+        fair_start_error = (
+            None
+            if fair_start_witness is not None
+            else f"{solver_name} emitted no fair-start witness"
+        )
         return SolverRun(
             solver=solver_name,
             time_limit_seconds=time_limit_seconds,
@@ -95,6 +118,9 @@ def run_solver(
             watchdog_limit_seconds=watchdog_seconds,
             watchdog_killed=False,
             solution=None,
+            fair_start_witness=fair_start_witness,
+            fair_start_valid=fair_start_error is None,
+            fair_start_error=fair_start_error,
             run_error=(
                 f"RuntimeError: {solver_name} exited without producing a result "
                 f"(exit {process.exitcode})"
@@ -104,6 +130,14 @@ def run_solver(
             solver_stderr_path=str(stderr_path) if stderr_path else None,
         )
 
+    if message.get("fatal"):
+        raise FairStartViolationError(message["error"])
+
+    message_witness = witness_from_payload(message.get("fair_start_witness"))
+    if message_witness is not None:
+        fair_start_witness = message_witness
+    fair_start_error = message.get("fair_start_error")
+
     if message["ok"]:
         return SolverRun(
             solver=solver_name,
@@ -112,6 +146,9 @@ def run_solver(
             watchdog_limit_seconds=watchdog_seconds,
             watchdog_killed=False,
             solution=solution_model(**message["solution"]),
+            fair_start_witness=fair_start_witness,
+            fair_start_valid=fair_start_error is None,
+            fair_start_error=fair_start_error,
             run_error=None,
             exit_code=process.exitcode,
             solver_stdout_path=str(stdout_path) if stdout_path else None,
@@ -125,6 +162,9 @@ def run_solver(
         watchdog_limit_seconds=watchdog_seconds,
         watchdog_killed=False,
         solution=None,
+        fair_start_witness=fair_start_witness,
+        fair_start_valid=fair_start_error is None,
+        fair_start_error=fair_start_error,
         run_error=message["error"],
         exit_code=process.exitcode,
         solver_stdout_path=str(stdout_path) if stdout_path else None,
@@ -139,6 +179,7 @@ def _process_context() -> mp.context.BaseContext:
 
 
 def _run_solver_child(
+    benchmark_name: str,
     solver_name: str,
     solver_factory,
     instance: Any,
@@ -158,18 +199,76 @@ def _run_solver_child(
         stderr_path=stderr,
         show_output=show_solver_output,
     ):
+        latest_witness = None
+
+        def record_witness(witness) -> None:
+            nonlocal latest_witness
+            validate_fair_start_witness(
+                witness,
+                benchmark_name=benchmark_name,
+                solver_name=solver_name,
+            )
+            latest_witness = witness
+            output_queue.put(
+                {
+                    "event": "fair_start_witness",
+                    "fair_start_witness": witness_to_payload(witness),
+                }
+            )
+
         try:
-            solver = solver_factory(method=solver_name, time_limit=time_limit_seconds)
-            solution = solver(instance, time_limit_seconds)
+            with fair_start_recorder(record_witness):
+                solver = solver_factory(
+                    method=solver_name, time_limit=time_limit_seconds
+                )
+                result = solver(instance, time_limit_seconds)
+            solver_output = validate_solver_result(
+                result,
+                benchmark_name=benchmark_name,
+                solver_name=solver_name,
+            )
+            latest_witness = solver_output.fair_start_witness
+            solution = solver_output.solution
             if solution is None:
                 raise NoSolutionFoundError(f"{solver_name} returned no solution")
-            output_queue.put({"ok": True, "solution": _solution_payload(solution)})
+            output_queue.put(
+                {
+                    "ok": True,
+                    "solution": _solution_payload(solution),
+                    "fair_start_witness": witness_to_payload(latest_witness),
+                    "fair_start_error": None,
+                }
+            )
+        except FairStartViolationError as exc:
+            traceback.print_exc()
+            output_queue.put(
+                {
+                    "ok": False,
+                    "fatal": True,
+                    "error": f"{exc.__class__.__name__}: {exc}",
+                }
+            )
         except Exception as exc:
             traceback.print_exc()
+            if latest_witness is None:
+                output_queue.put(
+                    {
+                        "ok": False,
+                        "fatal": True,
+                        "error": (
+                            "FairStartViolationError: "
+                            f"{solver_name} failed before emitting a fair-start "
+                            f"witness: {exc.__class__.__name__}: {exc}"
+                        ),
+                    }
+                )
+                return
             output_queue.put(
                 {
                     "ok": False,
                     "error": f"{exc.__class__.__name__}: {exc}",
+                    "fair_start_witness": witness_to_payload(latest_witness),
+                    "fair_start_error": None,
                 }
             )
 
@@ -180,6 +279,27 @@ def _solution_payload(solution: Any) -> dict[str, Any]:
     return solution.dict()
 
 
+def _collect_child_messages(output_queue) -> tuple[dict[str, Any] | None, Any | None]:
+    result_message = None
+    fair_start_witness = None
+    deadline = time.monotonic() + 1.0
+    while time.monotonic() < deadline:
+        try:
+            message = output_queue.get(timeout=0.05)
+        except queue_module.Empty:
+            if result_message is not None:
+                break
+            continue
+
+        witness = witness_from_payload(message.get("fair_start_witness"))
+        if witness is not None:
+            fair_start_witness = witness
+        if message.get("event") == "fair_start_witness":
+            continue
+        result_message = message
+    return result_message, fair_start_witness
+
+
 def _terminate_process_tree(process) -> None:
     _signal_process_tree(process, signal.SIGTERM)
     process.join(0.2)
diff --git a/src/solverforge_bench/fair_start.py b/src/solverforge_bench/fair_start.py
new file mode 100644
index 0000000..635916b
--- /dev/null
+++ b/src/solverforge_bench/fair_start.py
@@ -0,0 +1,212 @@
+"""Runtime fair-start witness helpers."""
+
+from __future__ import annotations
+
+import dataclasses
+import hashlib
+import json
+from contextvars import ContextVar
+from contextlib import contextmanager
+from collections.abc import Callable, Iterator
+from typing import Any
+
+from solverforge_bench.model import FairStartWitness, SolverResult
+
+
+FAIR_START_WITNESS_VERSION = 1
+_WITNESS_RECORDER: ContextVar[Callable[[FairStartWitness], None] | None] = ContextVar(
+    "fair_start_witness_recorder", default=None
+)
+
+
+class FairStartViolationError(RuntimeError):
+    """Raised when a solver run lacks a valid fair-start witness."""
+
+
+def make_fair_start_witness(
+    *,
+    benchmark_name: str,
+    solver: str,
+    planning_state: str,
+    solver_input: Any,
+    reference_solution_reads: int = 0,
+    adapter_hint_count: int = 0,
+    preliminary_solve_count: int = 0,
+    fallback_solution_enabled: bool = False,
+    preassigned_scalar_variables: int = 0,
+    prefilled_list_variables: int = 0,
+    native_checks: dict[str, Any] | None = None,
+) -> FairStartWitness:
+    return FairStartWitness(
+        version=FAIR_START_WITNESS_VERSION,
+        benchmark_name=benchmark_name,
+        solver=solver,
+        planning_state=planning_state,
+        solver_input_hash=stable_input_hash(solver_input),
+        reference_solution_reads=reference_solution_reads,
+        adapter_hint_count=adapter_hint_count,
+        preliminary_solve_count=preliminary_solve_count,
+        fallback_solution_enabled=fallback_solution_enabled,
+        preassigned_scalar_variables=preassigned_scalar_variables,
+        prefilled_list_variables=prefilled_list_variables,
+        native_checks=dict(native_checks or {}),
+    )
+
+
+def solver_result(solution: Any, witness: FairStartWitness) -> SolverResult:
+    return SolverResult(solution=solution, fair_start_witness=witness)
+
+
+def emit_fair_start_witness(witness: FairStartWitness) -> None:
+    recorder = _WITNESS_RECORDER.get()
+    if recorder is not None:
+        recorder(witness)
+
+
+@contextmanager
+def fair_start_recorder(
+    recorder: Callable[[FairStartWitness], None],
+) -> Iterator[None]:
+    token = _WITNESS_RECORDER.set(recorder)
+    try:
+        yield
+    finally:
+        _WITNESS_RECORDER.reset(token)
+
+
+def stable_input_hash(value: Any) -> str:
+    if isinstance(value, bytes):
+        payload = value
+    elif isinstance(value, str):
+        payload = value.encode("utf-8")
+    else:
+        payload = json.dumps(
+            json_safe(value),
+            sort_keys=True,
+            separators=(",", ":"),
+        ).encode("utf-8")
+    return hashlib.sha256(payload).hexdigest()
+
+
+def validate_solver_result(
+    result: Any, *, benchmark_name: str, solver_name: str
+) -> SolverResult:
+    if not isinstance(result, SolverResult):
+        raise FairStartViolationError(
+            f"{solver_name} returned {type(result).__name__}; expected SolverResult"
+        )
+    validate_fair_start_witness(
+        result.fair_start_witness,
+        benchmark_name=benchmark_name,
+        solver_name=solver_name,
+    )
+    return result
+
+
+def validate_fair_start_witness(
+    witness: FairStartWitness,
+    *,
+    benchmark_name: str,
+    solver_name: str,
+) -> None:
+    errors: list[str] = []
+    if not isinstance(witness, FairStartWitness):
+        raise FairStartViolationError(
+            f"{solver_name} returned no FairStartWitness instance"
+        )
+    if witness.version != FAIR_START_WITNESS_VERSION:
+        errors.append(f"version={witness.version}")
+    if witness.benchmark_name != benchmark_name:
+        errors.append(f"benchmark_name={witness.benchmark_name!r}")
+    if witness.solver != solver_name:
+        errors.append(f"solver={witness.solver!r}")
+    if not witness.planning_state:
+        errors.append("planning_state is blank")
+    if not _looks_like_sha256(witness.solver_input_hash):
+        errors.append("solver_input_hash is not a sha256 hex digest")
+
+    zero_fields = {
+        "reference_solution_reads": witness.reference_solution_reads,
+        "adapter_hint_count": witness.adapter_hint_count,
+        "preliminary_solve_count": witness.preliminary_solve_count,
+        "preassigned_scalar_variables": witness.preassigned_scalar_variables,
+        "prefilled_list_variables": witness.prefilled_list_variables,
+    }
+    for field_name, value in zero_fields.items():
+        if value != 0:
+            errors.append(f"{field_name}={value}")
+    if witness.fallback_solution_enabled:
+        errors.append("fallback_solution_enabled=true")
+    for field_name in ("cp_sat_solution_hint_vars", "cp_sat_solution_hint_values"):
+        value = witness.native_checks.get(field_name)
+        if value not in (None, 0):
+            errors.append(f"{field_name}={value}")
+    if witness.native_checks.get("routing_assignment_hint_present") is True:
+        errors.append("routing_assignment_hint_present=true")
+
+    if errors:
+        raise FairStartViolationError(
+            f"{solver_name} fair-start witness failed: {', '.join(errors)}"
+        )
+
+
+def witness_to_payload(witness: FairStartWitness) -> dict[str, Any]:
+    return json_safe(witness.as_dict())
+
+
+def witness_from_payload(payload: dict[str, Any] | None) -> FairStartWitness | None:
+    if payload is None:
+        return None
+    return FairStartWitness(**payload)
+
+
+def witness_from_native_output(
+    output: dict[str, Any],
+    *,
+    benchmark_name: str,
+    solver: str,
+    planning_state: str,
+    solver_input: Any,
+    witness_key: str = "fair_start_witness",
+) -> FairStartWitness:
+    native_witness = output.get(witness_key)
+    native_checks = dict(native_witness or {})
+    return make_fair_start_witness(
+        benchmark_name=benchmark_name,
+        solver=solver,
+        planning_state=planning_state,
+        solver_input=solver_input,
+        reference_solution_reads=int(native_checks.pop("reference_solution_reads", 0)),
+        adapter_hint_count=int(native_checks.pop("adapter_hint_count", 0)),
+        preliminary_solve_count=int(native_checks.pop("preliminary_solve_count", 0)),
+        fallback_solution_enabled=bool(
+            native_checks.pop("fallback_solution_enabled", False)
+        ),
+        preassigned_scalar_variables=int(
+            native_checks.pop("preassigned_scalar_variables", 0)
+        ),
+        prefilled_list_variables=int(native_checks.pop("prefilled_list_variables", 0)),
+        native_checks=native_checks,
+    )
+
+
+def json_safe(value: Any) -> Any:
+    if value is None or isinstance(value, str | int | float | bool):
+        return value
+    if dataclasses.is_dataclass(value):
+        return json_safe(dataclasses.asdict(value))
+    if hasattr(value, "model_dump"):
+        return json_safe(value.model_dump(mode="python"))
+    if isinstance(value, dict):
+        return {str(key): json_safe(item) for key, item in value.items()}
+    if isinstance(value, (list, tuple, set)):
+        return [json_safe(item) for item in value]
+    if hasattr(value, "tolist"):
+        return json_safe(value.tolist())
+    return str(value)
+
+
+def _looks_like_sha256(value: str) -> bool:
+    if len(value) != 64:
+        return False
+    return all(char in "0123456789abcdef" for char in value)
diff --git a/src/solverforge_bench/model.py b/src/solverforge_bench/model.py
index a49121e..78a4c5b 100644
--- a/src/solverforge_bench/model.py
+++ b/src/solverforge_bench/model.py
@@ -2,12 +2,12 @@
 
 from __future__ import annotations
 
-from dataclasses import dataclass, field
+from dataclasses import asdict, dataclass, field
 from pathlib import Path
 from typing import Any, Callable, Iterable, Protocol
 
 
-SolverFactory = Callable[..., Callable[[Any, int], Any]]
+SolverFactory = Callable[..., Callable[[Any, int], "SolverResult"]]
 
 
 class NoSolutionFoundError(RuntimeError):
@@ -22,6 +22,31 @@ class SolverVersion:
     metadata: dict[str, Any] = field(default_factory=dict)
 
 
+@dataclass(frozen=True)
+class FairStartWitness:
+    version: int
+    benchmark_name: str
+    solver: str
+    planning_state: str
+    solver_input_hash: str
+    reference_solution_reads: int = 0
+    adapter_hint_count: int = 0
+    preliminary_solve_count: int = 0
+    fallback_solution_enabled: bool = False
+    preassigned_scalar_variables: int = 0
+    prefilled_list_variables: int = 0
+    native_checks: dict[str, Any] = field(default_factory=dict)
+
+    def as_dict(self) -> dict[str, Any]:
+        return asdict(self)
+
+
+@dataclass(frozen=True)
+class SolverResult:
+    solution: Any
+    fair_start_witness: FairStartWitness
+
+
 @dataclass(frozen=True)
 class BenchmarkCase:
     dataset: str
@@ -42,6 +67,9 @@ class SolverRun:
     watchdog_limit_seconds: float
     watchdog_killed: bool
     solution: Any | None
+    fair_start_witness: FairStartWitness | None
+    fair_start_valid: bool
+    fair_start_error: str | None
     run_error: str | None
     exit_code: int | None
     solver_stdout_path: str | None = None
@@ -78,6 +106,9 @@ class BenchmarkRow:
     wall_time_over_limit: bool
     watchdog_limit_seconds: float
     watchdog_killed: bool
+    fair_start_valid: bool
+    fair_start_error: str | None
+    fair_start_witness: dict[str, Any] | None
     run_error: str | None
     solver_stdout_path: str | None
     solver_stderr_path: str | None
@@ -108,6 +139,9 @@ def as_dict(self) -> dict[str, Any]:
             "wall_time_over_limit": self.wall_time_over_limit,
             "watchdog_limit_seconds": self.watchdog_limit_seconds,
             "watchdog_killed": self.watchdog_killed,
+            "fair_start_valid": self.fair_start_valid,
+            "fair_start_error": self.fair_start_error,
+            "fair_start_witness": self.fair_start_witness,
             "run_error": self.run_error,
             "solver_stdout_path": self.solver_stdout_path,
             "solver_stderr_path": self.solver_stderr_path,
@@ -139,7 +173,7 @@ def cases(self, args: Any) -> Iterable[BenchmarkCase]: ...
 
     def create_solver(
         self, method: str, time_limit: int
-    ) -> Callable[[Any, int], Any]: ...
+    ) -> Callable[[Any, int], SolverResult]: ...
 
     def solver_versions(self, solvers: Iterable[str]) -> dict[str, SolverVersion]: ...
 
diff --git a/src/solverforge_bench/postgres.py b/src/solverforge_bench/postgres.py
index 3655064..f15d054 100644
--- a/src/solverforge_bench/postgres.py
+++ b/src/solverforge_bench/postgres.py
@@ -112,6 +112,9 @@ def _insert_result_frame(self, frame) -> None:
                     wall_time_over_limit,
                     watchdog_limit_seconds,
                     watchdog_killed,
+                    fair_start_valid,
+                    fair_start_error,
+                    fair_start_witness,
                     run_error,
                     solver_stdout_path,
                     solver_stderr_path,
@@ -144,6 +147,9 @@ def _insert_result_frame(self, frame) -> None:
                     %(wall_time_over_limit)s,
                     %(watchdog_limit_seconds)s,
                     %(watchdog_killed)s,
+                    %(fair_start_valid)s,
+                    %(fair_start_error)s,
+                    %(fair_start_witness)s,
                     %(run_error)s,
                     %(solver_stdout_path)s,
                     %(solver_stderr_path)s,
@@ -182,6 +188,9 @@ def _update_result_count(self, result_count: int) -> None:
     def _postgres_params(self, row: dict[str, Any]) -> dict[str, Any]:
         params = dict(row)
         params["solver_version_id"] = self._solver_version_ids[params["solver"]]
+        params["fair_start_witness"] = self._jsonb(
+            _json_safe(params["fair_start_witness"])
+        )
         params["native_fields"] = self._jsonb(_json_safe(params["native_fields"]))
         params["row_payload"] = self._jsonb(_json_safe(params["row_payload"]))
         return params
@@ -383,6 +392,12 @@ def make_postgres_config(
             "log_level": getattr(args, "log_level", None),
             "show_solver_output": getattr(args, "show_solver_output", None),
             "capture_solver_output": getattr(args, "capture_solver_output", None),
+            "fair_start_witness_version": 1,
+            "fair_start_contract": (
+                "Solvers must start from unassigned scalar variables or empty "
+                "list variables, with no adapter-owned hints, preliminary "
+                "solves, fallback schedules, or reference-solution reads."
+            ),
             "config_path": (
                 str(args.config) if getattr(args, "config", None) else None
             ),
diff --git a/src/solverforge_bench/runner.py b/src/solverforge_bench/runner.py
index ad7e128..08c518c 100644
--- a/src/solverforge_bench/runner.py
+++ b/src/solverforge_bench/runner.py
@@ -133,6 +133,7 @@ def run_benchmark(spec: BenchmarkSpec, args: Any) -> Path:
                             captured_stderr_path,
                         )
                         run = run_solver(
+                            benchmark_name=spec.name,
                             solver_name=solver_name,
                             solver_factory=spec.create_solver,
                             solution_model=spec.solution_model,
@@ -249,6 +250,13 @@ def _row(
         ),
         watchdog_limit_seconds=run.watchdog_limit_seconds,
         watchdog_killed=run.watchdog_killed,
+        fair_start_valid=run.fair_start_valid,
+        fair_start_error=run.fair_start_error,
+        fair_start_witness=(
+            run.fair_start_witness.as_dict()
+            if run.fair_start_witness is not None
+            else None
+        ),
         run_error=run.run_error,
         solver_stdout_path=run.solver_stdout_path,
         solver_stderr_path=run.solver_stderr_path,

From b3fc2e61b1f2cbe5f84da9c9b77ed291fc9ceef6 Mon Sep 17 00:00:00 2001
From: Vittorio Distefano <info@vdistefano.studio>
Date: Thu, 28 May 2026 16:59:17 +0200
Subject: [PATCH 24/29] feat(cvrp): broaden SolverForge list neighborhoods

Add rotating round-robin selection and a list ruin selector to the CVRP SolverForge search configuration. This gives the retained list-variable model a broader mix of route-level neighborhoods without changing the benchmark harness or supplying any adapter-owned incumbent.

The change keeps the fair-start contract intact because routes still start empty and construction/search remain inside SolverForge. It was validated in both make bench-cvrp-solverforge-quick-db and make bench-cvrp-quick-db, followed by row-level fair-start witness checks.
---
 .../src/cvrp_bench/solver/solverforge/solver.toml     | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/list-variable/cvrp/src/cvrp_bench/solver/solverforge/solver.toml b/list-variable/cvrp/src/cvrp_bench/solver/solverforge/solver.toml
index e766bc0..79c7435 100644
--- a/list-variable/cvrp/src/cvrp_bench/solver/solverforge/solver.toml
+++ b/list-variable/cvrp/src/cvrp_bench/solver/solverforge/solver.toml
@@ -30,6 +30,7 @@ limit = 4
 
 [phases.move_selector]
 type = "union_move_selector"
+selection_order = "rotating_round_robin"
 
 [[phases.move_selector.selectors]]
 type = "nearby_list_change_move_selector"
@@ -64,6 +65,16 @@ moves_per_step = 10
 entity_class = "Route"
 variable_name = "visits"
 
+[[phases.move_selector.selectors]]
+type = "list_ruin_move_selector"
+min_ruin_count = 4
+max_ruin_count = 20
+moves_per_step = 10
+max_source_list_len = 8
+skip_empty_destinations = true
+entity_class = "Route"
+variable_name = "visits"
+
 [[phases.move_selector.selectors]]
 type = "limited_neighborhood"
 selected_count_limit = 500

From a47a0369f5981ceb42c87da6f96abb816b7876ca Mon Sep 17 00:00:00 2001
From: Vittorio Distefano <info@vdistefano.studio>
Date: Thu, 28 May 2026 16:59:24 +0200
Subject: [PATCH 25/29] docs(bench): document fair-start witness contract

Document that fair starts are now a runtime-certified benchmark contract, not only a static source convention. The docs explain the SolverResult witness fields, the persisted CSV/PostgreSQL columns, and the row-verification Make target for DB smoke runs.

Update the repository wireframe with the CVRP, employee-scheduling, and job-shop witness surfaces, including native OR-Tools CP-SAT hint checks and Timefold/SolverForge planning-state counts. The contributor guide now requires both static and row-level fair-start verification when relevant.

Validated with make verify-fair-start and the row-level witness checks for the successful quick DB smoke runs.
---
 AGENTS.md    | 34 ++++++++++++++++++++----------
 README.md    | 45 ++++++++++++++++++++++++++++-----------
 WIREFRAME.md | 59 ++++++++++++++++++++++++++++++++++++++--------------
 3 files changed, 99 insertions(+), 39 deletions(-)

diff --git a/AGENTS.md b/AGENTS.md
index 9941bcb..9ec6ddc 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -8,11 +8,10 @@
   behavior or structure changes.
 - `.github/workflows/ci.yml` contains the split GitHub/Forgejo CI workflow.
   Keep its sibling SolverForge checkout paths aligned with the active adapter
-  `Cargo.toml` path dependencies. The Rust jobs must clone SolverForge
-  `v0.14.1` into `../solverforge`, clone `feat/node-sharing-compiler` into
-  `../solverforge-node-sharing`, and run Cargo checks with `--locked`; the
-  Python jobs must create the root `.venv` with `make install-python-deps`
-  before parity validation.
+  `Cargo.toml` path dependencies. The Rust jobs must clone SolverForge `main`
+  into `../solverforge` and run Cargo checks with `--locked`; the Python jobs
+  must create the root `.venv` with `make install-python-deps` before parity
+  validation.
 - `src/solverforge_bench/` contains the shared benchmark framework. CLI,
   TOML configuration, registry, run matrix, timing, overshoot calculation,
   watchdog containment, result rows, CSV writing, production logging, solver
@@ -39,10 +38,9 @@
   creates the single repository virtualenv used by all benchmark commands.
 - `make install-python-deps` creates or refreshes that root `.venv` from the
   Makefile.
-- The CVRP SolverForge adapter is pinned to SolverForge `0.14.1` and currently
-  uses the sibling checkout at `../solverforge/crates/solverforge`. The
-  employee-scheduling SolverForge adapter uses the `0.15.0` node-sharing
-  compiler branch at `../solverforge-node-sharing/crates/solverforge`.
+- The CVRP, employee-scheduling, and job-shop SolverForge adapters are pinned
+  to SolverForge `0.15.1` and use the sibling checkout at
+  `../solverforge/crates/solverforge`.
 - Benchmark run targets pin the shared harness with per-suite CPU defaults:
   `CVRP_BENCH_CPU ?= 0`, `EMPLOYEE_BENCH_CPU ?= 1`, and
   `JOBSHOP_BENCH_CPU ?= 2`. They also set `OMP_NUM_THREADS=1`,
@@ -138,8 +136,9 @@ deterministic run and confirm failures are solution failures, not loader or
 adapter errors.
 
 For CI or documentation contract changes, also verify Python syntax with
-`python -m compileall -q src list-variable/cvrp/src scalar-variable/employee-scheduling/src scripts`
-and parse `benchmark*.toml` with `tomllib` or an equivalent TOML parser.
+`python -m compileall -q src list-variable/cvrp/src scalar-variable/employee-scheduling/src scalar-variable/job-shop-scheduling/src scripts`,
+run `make verify-fair-start`, and parse `benchmark*.toml` with `tomllib` or an
+equivalent TOML parser.
 
 ## Commit & Pull Request Guidelines
 
@@ -161,6 +160,19 @@ PostgreSQL persistence policy. The nominal benchmark budget is not a hard kill
 deadline; preserve late returned solutions and record overshoot. Only the
 separate watchdog may terminate runaway processes.
 
+Benchmark fairness is part of the architecture, not an optional benchmark knob.
+Solvers must not receive or construct adapter-owned initial feasible schedules,
+incumbent hints, hard seeds, fallback schedules, warm starts, or reference
+solutions. The only acceptable initial planning state is unassigned scalar
+variables or empty list variables. Every solver wrapper must return
+`SolverResult`, emit a fair-start witness before invoking the actual solver, and
+keep native witness checks aligned with the underlying adapter. Reference
+solutions belong only in specs, validators, parity scripts, demos, and result
+evaluation. Run `make verify-fair-start` when editing solver adapters, solver
+specs, validators, benchmark CI, or benchmark architecture docs. For persisted
+smoke runs, also run `make verify-fair-start-rows RUN_ID=<uuid>` so PostgreSQL
+rows prove the runtime contract, not only the static source shape.
+
 Do not reintroduce `standard-variable`, `CoverageGroup`, `coverage_first_fit`,
 or benchmark-local scoring internals for employee scheduling. The active
 terminology is `scalar-variable/employee-scheduling`, and the active SolverForge
diff --git a/README.md b/README.md
index 191c09e..17ba405 100644
--- a/README.md
+++ b/README.md
@@ -51,11 +51,10 @@ normalization, and nightly runs. `make install-python-deps` creates or refreshes
 it before benchmark builds and is the CI-safe entrypoint for scripts that
 bootstrap themselves through the repository virtualenv.
 
-The CVRP SolverForge benchmark adapter is pinned to SolverForge `0.14.1` and
-uses the sibling local checkout at `../solverforge/crates/solverforge`. The
-employee-scheduling SolverForge adapter uses the `0.15.0` node-sharing compiler
-branch at `../solverforge-node-sharing/crates/solverforge`. Keep CI or local
-bootstrap checkouts aligned to those Cargo paths.
+The CVRP, employee-scheduling, and job-shop SolverForge benchmark adapters are
+aligned to SolverForge `0.15.1` on the sibling local checkout at
+`../solverforge/crates/solverforge`. Keep CI or local bootstrap checkouts
+aligned to that Cargo path.
 
 Benchmark run targets execute the shared harness through `taskset` with
 different default pinned cores: `CVRP_BENCH_CPU ?= 0`,
@@ -64,24 +63,46 @@ different default pinned cores: `CVRP_BENCH_CPU ?= 0`,
 different cores can proceed in parallel, while accidental same-core runs
 serialize. Set `BENCH_CPU=<n>` to intentionally force all suites onto one core.
 
+## Fair-Start Contract
+
+Solver adapters receive only the problem instance and the benchmark time limit.
+Scalar-variable models must start from unassigned planning variables, and
+list-variable models must start from empty lists. Adapter-owned incumbents,
+hints, hard seeds, fallback schedules, warm starts, and reference-solution reads
+are not valid benchmark inputs.
+
+Every solver wrapper returns a `SolverResult` with a runtime fair-start witness.
+The harness validates that witness in the child process, records
+`fair_start_valid`, `fair_start_error`, and `fair_start_witness` in CSV and
+PostgreSQL rows, and aborts the run if a solver reaches the execution boundary
+without a clean witness. Native adapters also report solver-specific checks,
+such as CP-SAT solution-hint counts for OR-Tools.
+
+Reference solutions remain valid in specs, validators, parity scripts, demos,
+and result evaluation because they are external scoring inputs, not solver
+starts. Run `make verify-fair-start` after changing solver adapters, specs,
+validators, CI, or benchmark architecture documentation. After a PostgreSQL
+smoke run, use `make verify-fair-start-rows RUN_ID=<uuid>` to require every
+persisted row in that run to carry a valid witness.
+
 ## CI
 
 `.github/workflows/ci.yml` defines separate jobs for GitHub-hosted Actions and
 local Forgejo runners. The Python jobs set up Python 3.14, create the root
 `.venv` with `make install-python-deps HOST_PYTHON=...`, compile the source
-trees, parse `benchmark*.toml`, run `make validate-cvrp`, and run
+trees including job-shop scheduling, parse `benchmark*.toml`, run
+`make verify-fair-start`, run `make validate-cvrp`, and run
 `make validate-employee-model-parity`. The parity script requires that root
 `.venv`, so CI must use the Makefile bootstrap instead of a detached
 `python -m pip install -e .`.
 
-The Rust jobs clone SolverForge tag `v0.14.1` into
-`$GITHUB_WORKSPACE/../solverforge` and clone `feat/node-sharing-compiler` into
-`$GITHUB_WORKSPACE/../solverforge-node-sharing`, matching the active adapter
-`Cargo.toml` path dependencies. They set the PyO3 Python environment from
+The Rust jobs clone SolverForge `main` into
+`$GITHUB_WORKSPACE/../solverforge`, matching the active adapter `Cargo.toml`
+path dependencies. They set the PyO3 Python environment from
 `actions/setup-python`, then run formatting,
 `cargo clippy --locked --all-targets -- -D warnings`, and `cargo build --locked`
 for the CVRP SolverForge adapter, CVRP rustvrp adapter, and employee scheduling
-SolverForge adapter.
+SolverForge adapter, and job-shop scheduling SolverForge adapter.
 
 ## CVRP Commands
 
@@ -400,7 +421,7 @@ make bench-employee-scheduling-quick
 make bench-employee-scheduling-quick-db
 make bench-job-shop-scheduling-quick
 make bench-job-shop-scheduling-quick-db
-make bench-cvrp-db BENCH_ARGS="--run-kind tag --release-tag v0.14.1"
+make bench-cvrp-db BENCH_ARGS="--run-kind tag --release-tag v0.15.1"
 make bench-cvrp-db BENCH_ARGS="--run-kind quick --nightly"
 make bench-nightly-db
 ```
diff --git a/WIREFRAME.md b/WIREFRAME.md
index b82d0bb..04c9d93 100644
--- a/WIREFRAME.md
+++ b/WIREFRAME.md
@@ -43,13 +43,14 @@ persistence, or CI changes, update this file with `README.md` and `AGENTS.md`.
 4. `runner.py` resolves cases, time limits, solvers, solver versions, output
    paths, artifact paths, run logs, and solver output paths. It then iterates
    `case -> time_limit -> solver`.
-5. `execution.py` runs each solver in a child process. The nominal time limit is
-   passed to the solver; it is not the hard kill deadline. The watchdog only
-   terminates runaway processes after `max(time_limit * multiplier,
-   time_limit + grace_seconds)`.
-6. Each benchmark spec validates and evaluates returned solutions, then the
-   shared runner writes an incremental CSV row and, when enabled, a PostgreSQL
-   row.
+5. `execution.py` runs each solver in a child process. Only the instance payload
+   and nominal time limit are passed to the solver callable; the nominal time
+   limit is not the hard kill deadline. The watchdog only terminates runaway
+   processes after `max(time_limit * multiplier, time_limit + grace_seconds)`.
+6. Each benchmark spec validates and evaluates returned solutions externally,
+   then the shared runner writes an incremental CSV row and, when enabled, a
+   PostgreSQL row. Reference solutions may be used here for scoring, not as
+   solver starts.
 7. Solver exceptions, including `NoSolutionFoundError`, become result rows with
    `run_error`. CSV or PostgreSQL write failures remain fatal output-integrity
    failures.
@@ -74,19 +75,25 @@ persistence, or CI changes, update this file with `README.md` and `AGENTS.md`.
   `rustvrp`, `pyhygese`, and `solverforge`.
 - Native solver builds are rooted in `solver/ortools/`, `solver/rustvrp/`,
   `solver/vroom/`, `solver/timefold/`, and `solver/solverforge/`.
-- The SolverForge CVRP adapter is pinned to SolverForge `0.14.1` and resolves
+- The SolverForge CVRP adapter is pinned to SolverForge `0.15.1` and resolves
   the sibling checkout at `../solverforge/crates/solverforge` from the
   repository root.
 - The CVRP model uses public SolverForge CVRP list-variable hooks:
   `VrpSolution`, matrix distance meters, route get/set/depot hooks, route
   metric classes, route distance, and route feasibility. The benchmark budget
   is applied through the model config provider.
+- The SolverForge and Timefold CVRP list variables start from empty route lists;
+  adapter-owned incumbents, route hints, and reference-solution reads are not
+  part of solver input.
 - `solverforge/solver.toml` uses reproducible mode, seed `42`, a 60 second
   internal termination cap, list construction phases, and a local-search union
   of nearby list moves, reverse moves, k-opt, ruin, and limited-neighborhood
   sublist change moves.
 - Native OR-Tools no-solution exits are normalized to `NoSolutionFoundError`
   rather than benchmark-aborting runtime errors.
+- Every CVRP wrapper emits a fair-start witness before solving. The native
+  OR-Tools and SolverForge adapters also include native witness checks in their
+  JSON output.
 
 ## Employee Scheduling Adapter Shape
 
@@ -105,14 +112,21 @@ persistence, or CI changes, update this file with `README.md` and `AGENTS.md`.
   artifacts for hard-feasible runs, and reports validator/model deltas through
   native columns.
 - `solver/solver.py` registers `solverforge`, `timefold`, and `ortools`.
-- The SolverForge NRP adapter is pinned to SolverForge `0.15.0` with `serde`
-  enabled and resolves the node-sharing compiler sibling checkout at
-  `../solverforge-node-sharing/crates/solverforge` from the repository root.
+- The SolverForge NRP adapter is pinned to SolverForge `0.15.1` with `serde`
+  enabled and resolves the sibling checkout at
+  `../solverforge/crates/solverforge` from the repository root.
 - The SolverForge NRP model uses public scalar APIs: per-shift candidate
   values, unassigned scalar variables for optional slots, nearby value/entity
   candidates, and one `ScalarGroup::assignment` for required minimum slots,
   one nurse per day capacity, adjacent forbidden-succession assignment rules,
   ordered shift positions, and nurse sequence keys.
+- SolverForge initializes each shift with `nurse_idx = None`, Timefold leaves
+  each `nurse` planning variable unset, and OR-Tools performs one CP-SAT solve
+  without adapter hints, hard seeds, warm starts, or fallback schedules.
+- The Python wrappers emit a witness before solving. SolverForge Rust counts
+  preassigned scalar variables, Timefold Java counts preassigned `nurse`
+  planning variables, and OR-Tools C++ inspects CP-SAT solution-hint fields in
+  the native model proto.
 - `solverforge_nrp/solver.toml` sets `environment_mode = "non_reproducible"`
   and `random_seed = 1`. It intentionally does not impose an independent
   termination cap; the shared harness passes the requested benchmark budget.
@@ -131,9 +145,18 @@ persistence, or CI changes, update this file with `README.md` and `AGENTS.md`.
   size, known optimum, lower/upper bounds, and makespan gap through native
   columns.
 - `solver/solver.py` registers `solverforge`, `timefold`, and `ortools`.
-- The SolverForge JSSP adapter is pinned to SolverForge `0.14.1` and resolves
+- The SolverForge JSSP adapter is pinned to SolverForge `0.15.1` and resolves
   the sibling checkout at `../solverforge/crates/solverforge` from the
   repository root.
+- Its list model declares each operation's fixed machine owner with
+  `element_owner_fn`; SolverForge construction and list neighborhoods must not
+  move an operation to a non-required machine.
+- SolverForge and Timefold JSSP machine operation lists start empty. Known best
+  bounds and validation data stay in specs and validators, not in solver-start
+  incumbents.
+- The JSSP wrappers emit witnesses before solving. SolverForge Rust and
+  Timefold Java count prefilled machine lists, and OR-Tools C++ records CP-SAT
+  solution-hint counts from the model proto.
 
 ## Makefile Contract
 
@@ -144,6 +167,11 @@ persistence, or CI changes, update this file with `README.md` and `AGENTS.md`.
   Timefold, SolverForge, and OR-Tools integrations.
 - `make build-job-shop-scheduling` builds Python dependencies plus job-shop
   Timefold, SolverForge, and OR-Tools integrations.
+- `make verify-fair-start` enforces that active solver adapters start from
+  unassigned scalar variables or empty list variables, emit runtime witnesses,
+  and do not read reference solutions or inject adapter-owned incumbents.
+- `make verify-fair-start-rows RUN_ID=<uuid>` checks persisted PostgreSQL rows
+  for valid fair-start witnesses after a DB smoke run.
 - `make bench-cvrp-quick` runs three CVRP instances at 1 and 10 seconds with
   all registered CVRP solvers.
 - `make bench-cvrp-quick-db` runs the same CVRP smoke path after applying
@@ -237,10 +265,9 @@ persistence, or CI changes, update this file with `README.md` and `AGENTS.md`.
   `.venv` through `make install-python-deps HOST_PYTHON=...`, compiles Python
   source, parses benchmark TOML examples, validates bundled CVRP instances, and
   validates employee model parity.
-- Rust CI clones SolverForge tag `v0.14.1` into
-  `$GITHUB_WORKSPACE/../solverforge` and clones `feat/node-sharing-compiler`
-  into `$GITHUB_WORKSPACE/../solverforge-node-sharing`, the exact relative paths
-  declared by the active adapter `Cargo.toml` files. It checks formatting, runs
+- Rust CI clones SolverForge `main` into `$GITHUB_WORKSPACE/../solverforge`,
+  the exact relative path declared by the active adapter `Cargo.toml` files. It
+  checks formatting, runs
   `cargo clippy --locked --all-targets -- -D warnings`, and runs
   `cargo build --locked` for the CVRP SolverForge adapter, CVRP rustvrp
   adapter, and employee SolverForge adapter.

From 69382635293ce7afa2147aa41baa02c16ed0cef3 Mon Sep 17 00:00:00 2001
From: Vittorio Distefano <info@vdistefano.studio>
Date: Thu, 28 May 2026 17:55:52 +0200
Subject: [PATCH 26/29] fix(results): keep normalized CSV witness serializable

Serialize JSON-shaped normalized columns before writing CSV output so Polars does not receive nested struct data for fair_start_witness. This preserves the documented make normalize-results default path for benchmark CSV artifacts that carry fair-start witnesses.

Leave NDJSON output on the parsed JSON path so file consumers that request NDJSON still receive a structured fair_start_witness object instead of an escaped JSON string.

Verified with python3.14 -m compileall -q scripts, make normalize-results for CSV and NDJSON on a generated job-shop benchmark artifact, JSON shape checks for both outputs, make verify-fair-start, and git diff --check.
---
 scripts/normalize_results.py | 30 +++++++++++++++++++++++++++++-
 1 file changed, 29 insertions(+), 1 deletion(-)

diff --git a/scripts/normalize_results.py b/scripts/normalize_results.py
index 6434339..5f381cf 100755
--- a/scripts/normalize_results.py
+++ b/scripts/normalize_results.py
@@ -15,6 +15,8 @@
 ensure_repo_venv(REPO_ROOT)
 sys.path.insert(0, str(REPO_ROOT / "src"))
 
+import polars as pl  # noqa: E402
+
 from solverforge_bench.csv import GLOBAL_COLUMNS, NORMALIZED_COLUMNS  # noqa: E402
 from solverforge_bench.etl import (  # noqa: E402
     frame_from_records,
@@ -23,6 +25,9 @@
 )
 
 
+CSV_JSON_COLUMNS = {"fair_start_witness"}
+
+
 def parse_args() -> argparse.Namespace:
     parser = argparse.ArgumentParser(
         description="Normalize SolverForge benchmark CSV files for database loading."
@@ -130,11 +135,34 @@ def normalize_global_row(
 def write_rows(path: Path, rows, output_format: str) -> None:
     path.parent.mkdir(parents=True, exist_ok=True)
     if output_format == "csv":
-        write_csv_frame(path, rows, columns=NORMALIZED_COLUMNS)
+        write_csv_frame(
+            path,
+            _serialize_json_columns_for_csv(rows),
+            columns=NORMALIZED_COLUMNS,
+        )
         return
     rows.select(NORMALIZED_COLUMNS).write_ndjson(path)
 
 
+def _serialize_json_columns_for_csv(rows: pl.DataFrame) -> pl.DataFrame:
+    expressions = [
+        pl.col(column).map_elements(_compact_json_or_none, return_dtype=pl.String)
+        for column in CSV_JSON_COLUMNS
+        if column in rows.columns
+    ]
+    if not expressions:
+        return rows
+    return rows.with_columns(expressions)
+
+
+def _compact_json_or_none(value: object | None) -> str | None:
+    if value is None:
+        return None
+    if isinstance(value, str):
+        return value
+    return json.dumps(value, sort_keys=True, separators=(",", ":"))
+
+
 def blank_to_none(value: str | None) -> str | None:
     if value is None:
         return None

From 5799c25f5bd588d625d7923c558f68efd56edc00 Mon Sep 17 00:00:00 2001
From: Vittorio Distefano <info@vdistefano.studio>
Date: Thu, 28 May 2026 18:10:18 +0200
Subject: [PATCH 27/29] fix(fair-start): keep input hashing out of timed runs

Precompute one benchmark-case input hash in the runner before launching measured solver children and install it through the fair-start context in the child process. Witness construction now reuses that parent-provided digest instead of serializing and hashing large solver payloads inside the measured path.

This keeps fair-start witnesses stable for successful, failed, and native-output solver paths while avoiding repeated full-payload hashing for large instances such as CVRP distance matrices. Wrappers keep their existing witness calls, so the fairness contract remains centralized in the shared benchmark framework.

Verified with python3.14 -m compileall -q src scripts; python3.14 -m compileall -q src list-variable/cvrp/src scalar-variable/employee-scheduling/src scalar-variable/job-shop-scheduling/src scripts; a focused fair_start_input_hash proof that avoids serializing a sentinel payload; make verify-fair-start; git diff --check; a CVRP PyVRP witness-path run that recorded a valid fair-start witness before watchdog kill under load; and a job-shop OR-Tools ft06 1s smoke with hard_feasible=True.
---
 src/solverforge_bench/execution.py  |  9 +++++++-
 src/solverforge_bench/fair_start.py | 33 ++++++++++++++++++++++++++++-
 src/solverforge_bench/runner.py     |  3 +++
 3 files changed, 43 insertions(+), 2 deletions(-)

diff --git a/src/solverforge_bench/execution.py b/src/solverforge_bench/execution.py
index f9d6578..24fa282 100644
--- a/src/solverforge_bench/execution.py
+++ b/src/solverforge_bench/execution.py
@@ -13,6 +13,7 @@
 
 from solverforge_bench.fair_start import (
     FairStartViolationError,
+    fair_start_input_hash,
     fair_start_recorder,
     validate_fair_start_witness,
     validate_solver_result,
@@ -47,6 +48,7 @@ def run_solver(
     instance: Any,
     time_limit_seconds: int,
     watchdog_seconds: float,
+    solver_input_hash: str | None = None,
     stdout_path: Path | None = None,
     stderr_path: Path | None = None,
     capture_solver_output: bool = True,
@@ -63,6 +65,7 @@ def run_solver(
             solver_name,
             solver_factory,
             instance,
+            solver_input_hash,
             time_limit_seconds,
             output_queue,
             str(stdout_path) if stdout_path else None,
@@ -183,6 +186,7 @@ def _run_solver_child(
     solver_name: str,
     solver_factory,
     instance: Any,
+    solver_input_hash: str | None,
     time_limit_seconds: int,
     output_queue,
     stdout_path: str | None,
@@ -217,7 +221,10 @@ def record_witness(witness) -> None:
             )
 
         try:
-            with fair_start_recorder(record_witness):
+            with (
+                fair_start_input_hash(solver_input_hash),
+                fair_start_recorder(record_witness),
+            ):
                 solver = solver_factory(
                     method=solver_name, time_limit=time_limit_seconds
                 )
diff --git a/src/solverforge_bench/fair_start.py b/src/solverforge_bench/fair_start.py
index 635916b..eb48f81 100644
--- a/src/solverforge_bench/fair_start.py
+++ b/src/solverforge_bench/fair_start.py
@@ -17,6 +17,9 @@
 _WITNESS_RECORDER: ContextVar[Callable[[FairStartWitness], None] | None] = ContextVar(
     "fair_start_witness_recorder", default=None
 )
+_PRECOMPUTED_INPUT_HASH: ContextVar[str | None] = ContextVar(
+    "fair_start_precomputed_input_hash", default=None
+)
 
 
 class FairStartViolationError(RuntimeError):
@@ -29,6 +32,7 @@ def make_fair_start_witness(
     solver: str,
     planning_state: str,
     solver_input: Any,
+    solver_input_hash: str | None = None,
     reference_solution_reads: int = 0,
     adapter_hint_count: int = 0,
     preliminary_solve_count: int = 0,
@@ -42,7 +46,10 @@ def make_fair_start_witness(
         benchmark_name=benchmark_name,
         solver=solver,
         planning_state=planning_state,
-        solver_input_hash=stable_input_hash(solver_input),
+        solver_input_hash=_solver_input_hash(
+            solver_input=solver_input,
+            explicit_hash=solver_input_hash,
+        ),
         reference_solution_reads=reference_solution_reads,
         adapter_hint_count=adapter_hint_count,
         preliminary_solve_count=preliminary_solve_count,
@@ -63,6 +70,15 @@ def emit_fair_start_witness(witness: FairStartWitness) -> None:
         recorder(witness)
 
 
+@contextmanager
+def fair_start_input_hash(solver_input_hash: str | None) -> Iterator[None]:
+    token = _PRECOMPUTED_INPUT_HASH.set(solver_input_hash)
+    try:
+        yield
+    finally:
+        _PRECOMPUTED_INPUT_HASH.reset(token)
+
+
 @contextmanager
 def fair_start_recorder(
     recorder: Callable[[FairStartWitness], None],
@@ -88,6 +104,21 @@ def stable_input_hash(value: Any) -> str:
     return hashlib.sha256(payload).hexdigest()
 
 
+def _solver_input_hash(*, solver_input: Any, explicit_hash: str | None) -> str:
+    if explicit_hash is not None:
+        return _validated_solver_input_hash(explicit_hash)
+    precomputed_hash = _PRECOMPUTED_INPUT_HASH.get()
+    if precomputed_hash is not None:
+        return _validated_solver_input_hash(precomputed_hash)
+    return stable_input_hash(solver_input)
+
+
+def _validated_solver_input_hash(value: str) -> str:
+    if not _looks_like_sha256(value):
+        raise ValueError(f"solver_input_hash is not a sha256 hex digest: {value!r}")
+    return value
+
+
 def validate_solver_result(
     result: Any, *, benchmark_name: str, solver_name: str
 ) -> SolverResult:
diff --git a/src/solverforge_bench/runner.py b/src/solverforge_bench/runner.py
index 08c518c..486313e 100644
--- a/src/solverforge_bench/runner.py
+++ b/src/solverforge_bench/runner.py
@@ -11,6 +11,7 @@
 
 from solverforge_bench.csv import IncrementalCsvWriter, benchmark_columns
 from solverforge_bench.execution import run_solver, watchdog_limit_seconds
+from solverforge_bench.fair_start import stable_input_hash
 from solverforge_bench.logging import (
     configure_run_logging,
     run_log_path,
@@ -95,6 +96,7 @@ def run_benchmark(spec: BenchmarkSpec, args: Any) -> Path:
                 LOGGER.info("postgres_run_opened run_id=%s", args.postgres_run_id)
 
             for case in spec.cases(args):
+                case_input_hash = stable_input_hash(case.payload)
                 LOGGER.info(
                     "case_start dataset=%s dataset_set=%s instance=%s "
                     "instance_size=%s",
@@ -140,6 +142,7 @@ def run_benchmark(spec: BenchmarkSpec, args: Any) -> Path:
                             instance=case.payload,
                             time_limit_seconds=time_limit,
                             watchdog_seconds=watchdog_seconds,
+                            solver_input_hash=case_input_hash,
                             stdout_path=captured_stdout_path,
                             stderr_path=captured_stderr_path,
                             capture_solver_output=args.capture_solver_output,

From 5ecb57f48dd0bdb7393d9f62dd32cef329918c93 Mon Sep 17 00:00:00 2001
From: Vittorio Distefano <info@vdistefano.studio>
Date: Thu, 28 May 2026 18:23:54 +0200
Subject: [PATCH 28/29] fix(fair-start): preserve native witness evidence

Require native-backed solver outputs to include a fair_start_witness object instead of manufacturing an all-zero witness when stale binaries or JARs omit the native evidence. Missing or malformed native witness payloads now fail through the existing fair-start violation path.

Keep normalized fair_start_witness values as validated JSON text instead of parsed dictionaries so Polars cannot widen mixed-solver witness objects with null keys. CSV and NDJSON normalization now preserve the recorded witness payload exactly enough for JSONB/key-existence consumers to trust the evidence.

Also remove the extra blank line at the end of benchmark.example.toml so the full branch diff passes whitespace checks.

Verified with python3.14 -m compileall -q src list-variable/cvrp/src scalar-variable/employee-scheduling/src scalar-variable/job-shop-scheduling/src scripts, a direct missing-native-witness FairStartViolationError check, make verify-fair-start, mixed OR-Tools/Timefold JSSP normalization checks for CSV and NDJSON witness keys, TOML parsing for benchmark*.toml, git diff --check, and git diff --check solverforge/main.
---
 benchmark.example.toml              |  1 -
 scripts/normalize_results.py        | 37 ++++-------------------------
 src/solverforge_bench/fair_start.py | 10 +++++++-
 3 files changed, 14 insertions(+), 34 deletions(-)

diff --git a/benchmark.example.toml b/benchmark.example.toml
index 7f38408..fdf231e 100644
--- a/benchmark.example.toml
+++ b/benchmark.example.toml
@@ -28,4 +28,3 @@ datasets = ["n005w4"]
 [benchmarks.job-shop-scheduling]
 dataset_set = "quick"
 datasets = ["ft06"]
-
diff --git a/scripts/normalize_results.py b/scripts/normalize_results.py
index 5f381cf..2bb4d42 100755
--- a/scripts/normalize_results.py
+++ b/scripts/normalize_results.py
@@ -15,8 +15,6 @@
 ensure_repo_venv(REPO_ROOT)
 sys.path.insert(0, str(REPO_ROOT / "src"))
 
-import polars as pl  # noqa: E402
-
 from solverforge_bench.csv import GLOBAL_COLUMNS, NORMALIZED_COLUMNS  # noqa: E402
 from solverforge_bench.etl import (  # noqa: E402
     frame_from_records,
@@ -25,9 +23,6 @@
 )
 
 
-CSV_JSON_COLUMNS = {"fair_start_witness"}
-
-
 def parse_args() -> argparse.Namespace:
     parser = argparse.ArgumentParser(
         description="Normalize SolverForge benchmark CSV files for database loading."
@@ -104,7 +99,7 @@ def normalize_global_row(
         "watchdog_killed": as_bool(row.get("watchdog_killed")),
         "fair_start_valid": as_bool(row.get("fair_start_valid")),
         "fair_start_error": blank_to_none(row.get("fair_start_error")),
-        "fair_start_witness": as_json(row.get("fair_start_witness")),
+        "fair_start_witness": as_json_text(row.get("fair_start_witness")),
         "run_error": blank_to_none(row.get("run_error")),
         "solver_stdout_path": blank_to_none(row.get("solver_stdout_path")),
         "solver_stderr_path": blank_to_none(row.get("solver_stderr_path")),
@@ -135,34 +130,11 @@ def normalize_global_row(
 def write_rows(path: Path, rows, output_format: str) -> None:
     path.parent.mkdir(parents=True, exist_ok=True)
     if output_format == "csv":
-        write_csv_frame(
-            path,
-            _serialize_json_columns_for_csv(rows),
-            columns=NORMALIZED_COLUMNS,
-        )
+        write_csv_frame(path, rows, columns=NORMALIZED_COLUMNS)
         return
     rows.select(NORMALIZED_COLUMNS).write_ndjson(path)
 
 
-def _serialize_json_columns_for_csv(rows: pl.DataFrame) -> pl.DataFrame:
-    expressions = [
-        pl.col(column).map_elements(_compact_json_or_none, return_dtype=pl.String)
-        for column in CSV_JSON_COLUMNS
-        if column in rows.columns
-    ]
-    if not expressions:
-        return rows
-    return rows.with_columns(expressions)
-
-
-def _compact_json_or_none(value: object | None) -> str | None:
-    if value is None:
-        return None
-    if isinstance(value, str):
-        return value
-    return json.dumps(value, sort_keys=True, separators=(",", ":"))
-
-
 def blank_to_none(value: str | None) -> str | None:
     if value is None:
         return None
@@ -193,11 +165,12 @@ def as_bool(value: str | None) -> bool | None:
     return value.lower() in {"1", "true", "yes"}
 
 
-def as_json(value: str | None) -> object | None:
+def as_json_text(value: str | None) -> str | None:
     value = blank_to_none(value)
     if value is None:
         return None
-    return json.loads(value)
+    json.loads(value)
+    return value
 
 
 if __name__ == "__main__":
diff --git a/src/solverforge_bench/fair_start.py b/src/solverforge_bench/fair_start.py
index eb48f81..95ef321 100644
--- a/src/solverforge_bench/fair_start.py
+++ b/src/solverforge_bench/fair_start.py
@@ -201,7 +201,15 @@ def witness_from_native_output(
     witness_key: str = "fair_start_witness",
 ) -> FairStartWitness:
     native_witness = output.get(witness_key)
-    native_checks = dict(native_witness or {})
+    if native_witness is None:
+        raise FairStartViolationError(
+            f"{solver} native output did not include {witness_key!r}"
+        )
+    if not isinstance(native_witness, dict):
+        raise FairStartViolationError(
+            f"{solver} native {witness_key!r} must be an object"
+        )
+    native_checks = dict(native_witness)
     return make_fair_start_witness(
         benchmark_name=benchmark_name,
         solver=solver,

From b5a3541e77a79db344d0e12649905f64392c27db Mon Sep 17 00:00:00 2001
From: Vittorio Distefano <info@vdistefano.studio>
Date: Thu, 28 May 2026 18:37:40 +0200
Subject: [PATCH 29/29] fix(fair-start): preserve employee native witness on no
 solution

Ensure employee-scheduling OR-Tools serializes its native CP-SAT fair-start witness even when the solver returns no feasible solution. The Python wrapper now requires native stdout on nonzero native exits, emits the native witness before raising NoSolutionFoundError, and fails the fair-start contract if native output is missing or invalid.

This keeps no-solution benchmark rows from passing with only the generic Python pre-solve witness and preserves row-level proof that the native CP-SAT model had no solution hints.
---
 .../solver/ortools/__init__.py                | 44 +++++++++++++++----
 .../solver/ortools/main.cc                    | 23 ++++++----
 2 files changed, 50 insertions(+), 17 deletions(-)

diff --git a/scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/ortools/__init__.py b/scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/ortools/__init__.py
index a48a31b..4eefab6 100644
--- a/scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/ortools/__init__.py
+++ b/scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/ortools/__init__.py
@@ -6,14 +6,20 @@
 from employee_scheduling_bench.domain.models import Assignment, Instance, Solution
 from employee_scheduling_bench.solver.instance_json import serialize_instance
 from solverforge_bench.fair_start import (
+    FairStartViolationError,
     emit_fair_start_witness,
     make_fair_start_witness,
     solver_result,
     witness_from_native_output,
 )
-from solverforge_bench.model import SolverResult
+from solverforge_bench.model import (
+    FairStartWitness,
+    NoSolutionFoundError,
+    SolverResult,
+)
 
 _BINARY_PATH = Path(__file__).parent / "target" / "employee_scheduling_ortools"
+_NO_SOLUTION_MESSAGE = "OR-Tools CP-SAT found no feasible solution"
 
 
 def solve_with_ortools(instance: Instance, time_limit: int) -> SolverResult:
@@ -38,20 +44,17 @@ def solve_with_ortools(instance: Instance, time_limit: int) -> SolverResult:
     )
     stderr = result.stderr.decode()
     if result.returncode != 0:
+        _, witness = _parse_native_output(result.stdout, instance_json)
+        emit_fair_start_witness(witness)
+        if stderr.strip() == _NO_SOLUTION_MESSAGE:
+            raise NoSolutionFoundError(_NO_SOLUTION_MESSAGE)
         raise RuntimeError(
             f"native OR-Tools solver failed (exit {result.returncode}):\n{stderr}"
         )
     if stderr:
         print(stderr, file=sys.stderr, end="")
 
-    output = json.loads(result.stdout)
-    witness = witness_from_native_output(
-        output,
-        benchmark_name="employee-scheduling",
-        solver="ortools",
-        planning_state="external_solver_model",
-        solver_input=instance_json,
-    )
+    output, witness = _parse_native_output(result.stdout, instance_json)
     weekly: list[list[Assignment]] = []
     for week_assignments in output["assignments"]:
         weekly.append(
@@ -78,3 +81,26 @@ def solve_with_ortools(instance: Instance, time_limit: int) -> SolverResult:
         ),
         witness,
     )
+
+
+def _parse_native_output(
+    stdout: bytes, instance_json: str
+) -> tuple[dict[str, object], FairStartWitness]:
+    if not stdout:
+        raise FairStartViolationError(
+            "ortools native output did not include 'fair_start_witness'"
+        )
+    try:
+        output = json.loads(stdout)
+    except json.JSONDecodeError as exc:
+        raise FairStartViolationError(
+            f"ortools native output was not valid JSON: {exc}"
+        ) from exc
+    witness = witness_from_native_output(
+        output,
+        benchmark_name="employee-scheduling",
+        solver="ortools",
+        planning_state="external_solver_model",
+        solver_input=instance_json,
+    )
+    return output, witness
diff --git a/scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/ortools/main.cc b/scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/ortools/main.cc
index 8d71e65..86ecbad 100644
--- a/scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/ortools/main.cc
+++ b/scalar-variable/employee-scheduling/src/employee_scheduling_bench/solver/ortools/main.cc
@@ -102,6 +102,11 @@ struct AssignmentVar {
   sat::BoolVar var;
 };
 
+struct SolveResult {
+  json::object output;
+  bool feasible;
+};
+
 int64_t AsInt(const json::value& value) {
   if (value.is_int64()) {
     return value.as_int64();
@@ -453,8 +458,7 @@ json::object SolutionJson(const InstancePayload& payload,
   return output;
 }
 
-std::optional<json::object> Solve(const InstancePayload& payload,
-                                  double time_limit) {
+SolveResult Solve(const InstancePayload& payload, double time_limit) {
   sat::CpModelBuilder model;
   const int num_nurses = static_cast<int>(payload.nurses.size());
   const int total_days = payload.num_weeks * 7;
@@ -682,7 +686,9 @@ std::optional<json::object> Solve(const InstancePayload& payload,
       sat::SolveCpModel(proto, &solver_model);
   if (response.status() != sat::CpSolverStatus::OPTIMAL &&
       response.status() != sat::CpSolverStatus::FEASIBLE) {
-    return std::nullopt;
+    json::object output;
+    output["fair_start_witness"] = fair_start_witness;
+    return SolveResult{std::move(output), false};
   }
 
   std::unordered_set<int64_t> assignment_keys;
@@ -695,7 +701,7 @@ std::optional<json::object> Solve(const InstancePayload& payload,
   json::object solution =
       SolutionJson(payload, assignment_keys, response.objective_value());
   solution["fair_start_witness"] = fair_start_witness;
-  return solution;
+  return SolveResult{std::move(solution), true};
 }
 
 }  // namespace
@@ -718,11 +724,12 @@ int main(int argc, char* argv[]) {
     const std::string input((std::istreambuf_iterator<char>(std::cin)),
                             std::istreambuf_iterator<char>());
     const InstancePayload payload = ParsePayload(input);
-    const std::optional<json::object> solution = Solve(payload, time_limit);
-    if (!solution.has_value()) {
-      throw std::runtime_error("OR-Tools CP-SAT found no feasible solution");
+    const SolveResult result = Solve(payload, time_limit);
+    std::cout << json::serialize(result.output) << '\n';
+    if (!result.feasible) {
+      std::cerr << "OR-Tools CP-SAT found no feasible solution" << '\n';
+      return EXIT_FAILURE;
     }
-    std::cout << json::serialize(*solution) << '\n';
     return EXIT_SUCCESS;
   } catch (const std::exception& error) {
     std::cerr << error.what() << '\n';