diff --git a/acceptance/apps/validate-package-manager/bin/npm b/acceptance/apps/validate-package-manager/bin/npm
new file mode 100755
index 00000000000..d452c009e29
--- /dev/null
+++ b/acceptance/apps/validate-package-manager/bin/npm
@@ -0,0 +1,7 @@
+#!/bin/sh
+printf '%s %s\n' "${0##*/}" "$*" >> commands.log
+if [ "$*" = "${VALIDATION_TEST_FAIL:-}" ]; then
+    echo "validation stdout"
+    echo "validation stderr" >&2
+    exit 17
+fi
diff --git a/acceptance/apps/validate-package-manager/bin/npm.cmd b/acceptance/apps/validate-package-manager/bin/npm.cmd
new file mode 100644
index 00000000000..1e7de72f5dd
--- /dev/null
+++ b/acceptance/apps/validate-package-manager/bin/npm.cmd
@@ -0,0 +1,7 @@
+@echo off
+echo %~n0 %*>>commands.log
+if "%*"=="%VALIDATION_TEST_FAIL%" (
+    echo validation stdout
+    echo validation stderr 1>&2
+    exit /b 17
+)
diff --git a/acceptance/apps/validate-package-manager/bin/pnpm b/acceptance/apps/validate-package-manager/bin/pnpm
new file mode 100755
index 00000000000..d452c009e29
--- /dev/null
+++ b/acceptance/apps/validate-package-manager/bin/pnpm
@@ -0,0 +1,7 @@
+#!/bin/sh
+printf '%s %s\n' "${0##*/}" "$*" >> commands.log
+if [ "$*" = "${VALIDATION_TEST_FAIL:-}" ]; then
+    echo "validation stdout"
+    echo "validation stderr" >&2
+    exit 17
+fi
diff --git a/acceptance/apps/validate-package-manager/bin/pnpm.cmd b/acceptance/apps/validate-package-manager/bin/pnpm.cmd
new file mode 100644
index 00000000000..1e7de72f5dd
--- /dev/null
+++ b/acceptance/apps/validate-package-manager/bin/pnpm.cmd
@@ -0,0 +1,7 @@
+@echo off
+echo %~n0 %*>>commands.log
+if "%*"=="%VALIDATION_TEST_FAIL%" (
+    echo validation stdout
+    echo validation stderr 1>&2
+    exit /b 17
+)
diff --git a/acceptance/apps/validate/conflicting/package-lock.json b/acceptance/apps/validate-package-manager/conflicting/package-lock.json
similarity index 100%
rename from acceptance/apps/validate/conflicting/package-lock.json
rename to acceptance/apps/validate-package-manager/conflicting/package-lock.json
diff --git a/acceptance/apps/validate/conflicting/package.json b/acceptance/apps/validate-package-manager/conflicting/package.json
similarity index 100%
rename from acceptance/apps/validate/conflicting/package.json
rename to acceptance/apps/validate-package-manager/conflicting/package.json
diff --git a/acceptance/apps/validate/conflicting/pnpm-lock.yaml b/acceptance/apps/validate-package-manager/conflicting/pnpm-lock.yaml
similarity index 100%
rename from acceptance/apps/validate/conflicting/pnpm-lock.yaml
rename to acceptance/apps/validate-package-manager/conflicting/pnpm-lock.yaml
diff --git a/acceptance/apps/validate-package-manager/metadata-npm/package.json b/acceptance/apps/validate-package-manager/metadata-npm/package.json
new file mode 100644
index 00000000000..f7baa297652
--- /dev/null
+++ b/acceptance/apps/validate-package-manager/metadata-npm/package.json
@@ -0,0 +1,3 @@
+{
+  "packageManager": "npm@10.9.2"
+}
diff --git a/acceptance/apps/validate/metadata-npm/pnpm-lock.yaml b/acceptance/apps/validate-package-manager/metadata-npm/pnpm-lock.yaml
similarity index 100%
rename from acceptance/apps/validate/metadata-npm/pnpm-lock.yaml
rename to acceptance/apps/validate-package-manager/metadata-npm/pnpm-lock.yaml
diff --git a/acceptance/apps/validate-package-manager/out.test.toml b/acceptance/apps/validate-package-manager/out.test.toml
new file mode 100644
index 00000000000..0938e678987
--- /dev/null
+++ b/acceptance/apps/validate-package-manager/out.test.toml
@@ -0,0 +1,2 @@
+Cloud = false
+EnvMatrix.DATABRICKS_BUNDLE_ENGINE = ["direct"]
diff --git a/acceptance/apps/validate-package-manager/output.txt b/acceptance/apps/validate-package-manager/output.txt
new file mode 100644
index 00000000000..f4ed7abf012
--- /dev/null
+++ b/acceptance/apps/validate-package-manager/output.txt
@@ -0,0 +1,36 @@
+
+=== Warn but continue on conflicting lockfiles
+>>> [CLI] apps validate --path conflicting
+Warn: found conflicting package managers; using npm from package-lock.json and ignoring pnpm-lock.yaml
+Validating project using npm...
+✅ Installing dependencies ([DURATION])
+✅ Generating types ([DURATION])
+✅ Running AST-grep lint ([DURATION])
+✅ Type checking ([DURATION])
+✅ Building ([DURATION])
+✅ Running tests ([DURATION])
+✅ All validation checks passed ([DURATION])
+
+=== Warn but continue on unsupported lockfiles
+>>> [CLI] apps validate --path unsupported
+Warn: ignoring unsupported lockfile yarn.lock; apps validation uses npm or pnpm
+Validating project using npm...
+✅ Installing dependencies ([DURATION])
+✅ Generating types ([DURATION])
+✅ Running AST-grep lint ([DURATION])
+✅ Type checking ([DURATION])
+✅ Building ([DURATION])
+✅ Running tests ([DURATION])
+✅ All validation checks passed ([DURATION])
+
+=== Declared package manager wins over a pnpm lockfile
+>>> [CLI] apps validate --path metadata-npm
+Warn: found conflicting package managers; using npm from package.json and ignoring pnpm-lock.yaml
+Validating project using npm...
+✅ Installing dependencies ([DURATION])
+✅ Generating types ([DURATION])
+✅ Running AST-grep lint ([DURATION])
+✅ Type checking ([DURATION])
+✅ Building ([DURATION])
+✅ Running tests ([DURATION])
+✅ All validation checks passed ([DURATION])
diff --git a/acceptance/apps/validate-package-manager/script b/acceptance/apps/validate-package-manager/script
new file mode 100644
index 00000000000..e647253dade
--- /dev/null
+++ b/acceptance/apps/validate-package-manager/script
@@ -0,0 +1,10 @@
+export PATH="$PWD/bin:$PATH"
+
+title "Warn but continue on conflicting lockfiles"
+trace $CLI apps validate --path conflicting
+
+title "Warn but continue on unsupported lockfiles"
+trace $CLI apps validate --path unsupported
+
+title "Declared package manager wins over a pnpm lockfile"
+trace $CLI apps validate --path metadata-npm
diff --git a/acceptance/apps/validate-package-manager/test.toml b/acceptance/apps/validate-package-manager/test.toml
new file mode 100644
index 00000000000..0d42c72ca66
--- /dev/null
+++ b/acceptance/apps/validate-package-manager/test.toml
@@ -0,0 +1,6 @@
+EnvMatrix.DATABRICKS_BUNDLE_ENGINE = ["direct"]
+Ignore = ["commands.log"]
+
+[[Repls]]
+Old = '\d+\.\d+s'
+New = '[DURATION]'
diff --git a/acceptance/apps/validate/unsupported/package.json b/acceptance/apps/validate-package-manager/unsupported/package.json
similarity index 100%
rename from acceptance/apps/validate/unsupported/package.json
rename to acceptance/apps/validate-package-manager/unsupported/package.json
diff --git a/acceptance/apps/validate/unsupported/yarn.lock b/acceptance/apps/validate-package-manager/unsupported/yarn.lock
similarity index 100%
rename from acceptance/apps/validate/unsupported/yarn.lock
rename to acceptance/apps/validate-package-manager/unsupported/yarn.lock
diff --git a/acceptance/apps/validate/bom/package.json b/acceptance/apps/validate/bom/package.json
deleted file mode 100644
index f54d4a2c495..00000000000
--- a/acceptance/apps/validate/bom/package.json
+++ /dev/null
@@ -1,5 +0,0 @@
-{
-  "scripts": {
-    "build": "node -e \"console.log('BOM build ran'); process.exit(17)\""
-  }
-}
diff --git a/acceptance/apps/validate/invalid/package.json b/acceptance/apps/validate/invalid/package.json
deleted file mode 100644
index 98232c64fce..00000000000
--- a/acceptance/apps/validate/invalid/package.json
+++ /dev/null
@@ -1 +0,0 @@
-{
diff --git a/acceptance/apps/validate/lifecycle/add-build/package.json b/acceptance/apps/validate/lifecycle/add-build/package.json
deleted file mode 100644
index a350619357d..00000000000
--- a/acceptance/apps/validate/lifecycle/add-build/package.json
+++ /dev/null
@@ -1,8 +0,0 @@
-{
-  "name": "validation-add-build",
-  "version": "1.0.0",
-  "scripts": {
-    "install": "node ../update-manifest.cjs",
-    "typegen": "node ../update-manifest.cjs"
-  }
-}
diff --git a/acceptance/apps/validate/lifecycle/invalidated/package.json b/acceptance/apps/validate/lifecycle/invalidated/package.json
deleted file mode 100644
index 0d35bc1fafd..00000000000
--- a/acceptance/apps/validate/lifecycle/invalidated/package.json
+++ /dev/null
@@ -1,8 +0,0 @@
-{
-  "name": "validation-invalidated-manifest",
-  "version": "1.0.0",
-  "scripts": {
-    "install": "node ../update-manifest.cjs",
-    "typegen": "node ../update-manifest.cjs"
-  }
-}
diff --git a/acceptance/apps/validate/lifecycle/remove-build/package.json b/acceptance/apps/validate/lifecycle/remove-build/package.json
deleted file mode 100644
index 615c53f9bad..00000000000
--- a/acceptance/apps/validate/lifecycle/remove-build/package.json
+++ /dev/null
@@ -1,9 +0,0 @@
-{
-  "name": "validation-remove-build",
-  "version": "1.0.0",
-  "scripts": {
-    "install": "node ../update-manifest.cjs",
-    "typegen": "node ../update-manifest.cjs",
-    "build": "node -e \"process.exit(17)\""
-  }
-}
diff --git a/acceptance/apps/validate/lifecycle/update-manifest.cjs b/acceptance/apps/validate/lifecycle/update-manifest.cjs
deleted file mode 100644
index 9a5f12da591..00000000000
--- a/acceptance/apps/validate/lifecycle/update-manifest.cjs
+++ /dev/null
@@ -1,17 +0,0 @@
-const fs = require("node:fs");
-
-if (process.env.npm_lifecycle_event === process.env.VALIDATION_UPDATE_STEP) {
-  const manifest = JSON.parse(fs.readFileSync("package.json", "utf8"));
-  switch (process.env.VALIDATION_UPDATE_ACTION) {
-    case "add":
-      manifest.scripts.build = "node -e \"console.log('added build ran'); process.exit(17)\"";
-      break;
-    case "remove":
-      delete manifest.scripts.build;
-      break;
-    case "invalidate":
-      fs.writeFileSync("package.json", "{");
-      return;
-  }
-  fs.writeFileSync("package.json", JSON.stringify(manifest));
-}
diff --git a/acceptance/apps/validate/metadata-npm/databricks.yml b/acceptance/apps/validate/metadata-npm/databricks.yml
deleted file mode 100644
index 738d8400c6a..00000000000
--- a/acceptance/apps/validate/metadata-npm/databricks.yml
+++ /dev/null
@@ -1,2 +0,0 @@
-bundle:
-  name: validation-metadata-npm
diff --git a/acceptance/apps/validate/metadata-npm/package.json b/acceptance/apps/validate/metadata-npm/package.json
deleted file mode 100644
index 6620a23a240..00000000000
--- a/acceptance/apps/validate/metadata-npm/package.json
+++ /dev/null
@@ -1,8 +0,0 @@
-{
-  "name": "validation-metadata-npm",
-  "version": "1.0.0",
-  "packageManager": "npm@10.9.2",
-  "scripts": {
-    "build": "node -e \"console.log('declared npm build ran'); process.exit(17)\""
-  }
-}
diff --git a/acceptance/apps/validate/non-runnable/package.json b/acceptance/apps/validate/non-runnable/package.json
deleted file mode 100644
index cfcacb6fe6d..00000000000
--- a/acceptance/apps/validate/non-runnable/package.json
+++ /dev/null
@@ -1,9 +0,0 @@
-{
-  "scripts": {
-    "typegen": "",
-    "typecheck": null,
-    "test": "",
-    "//": ["a comment"],
-    "build": "node -e \"console.log('non-runnable entries ignored'); process.exit(17)\""
-  }
-}
diff --git a/acceptance/apps/validate/null/package.json b/acceptance/apps/validate/null/package.json
deleted file mode 100644
index 19765bd501b..00000000000
--- a/acceptance/apps/validate/null/package.json
+++ /dev/null
@@ -1 +0,0 @@
-null
diff --git a/acceptance/apps/validate/output.txt b/acceptance/apps/validate/output.txt
index cfabc47f0f1..bbcd46b0c91 100644
--- a/acceptance/apps/validate/output.txt
+++ b/acceptance/apps/validate/output.txt
@@ -82,115 +82,3 @@ pnpm run --if-present typegen
 pnpm run --if-present lint:ast-grep
 pnpm run --if-present typecheck
 pnpm run --if-present build
-
-=== Warn but continue on conflicting lockfiles
->>> [CLI] apps validate --path conflicting
-Warn: found conflicting package managers; using npm from package-lock.json and ignoring pnpm-lock.yaml
-Validating project using npm...
-✅ Installing dependencies ([DURATION])
-✅ Generating types ([DURATION])
-✅ Running AST-grep lint ([DURATION])
-✅ Type checking ([DURATION])
-✅ Building ([DURATION])
-✅ Running tests ([DURATION])
-✅ All validation checks passed ([DURATION])
-
-=== Warn but continue on unsupported lockfiles
->>> [CLI] apps validate --path unsupported
-Warn: ignoring unsupported lockfile yarn.lock; apps validation uses npm or pnpm
-Validating project using npm...
-✅ Installing dependencies ([DURATION])
-✅ Generating types ([DURATION])
-✅ Running AST-grep lint ([DURATION])
-✅ Type checking ([DURATION])
-✅ Building ([DURATION])
-✅ Running tests ([DURATION])
-✅ All validation checks passed ([DURATION])
-
-=== Validate npm workspace scripts without root scripts
->>> grep -x workspace build ran LOG.workspaces
-workspace build ran
-
->>> grep -F validation failed (exit code 17) LOG.workspaces
-validation failed (exit code 17)
-
-=== Deploy rejects a failing npm workspace build
->>> grep -x workspace build ran LOG.workspaces-deploy
-workspace build ran
-
->>> grep -F validation failed - fix errors before deploying LOG.workspaces-deploy
-Error: validation failed - fix errors before deploying
-
-=== Use declared npm despite a pnpm lockfile
->>> grep -x declared npm build ran LOG.metadata-npm
-declared npm build ran
-
->>> grep -F validation failed (exit code 17) LOG.metadata-npm
-validation failed (exit code 17)
-
-=== Deploy honors the declared package manager
->>> grep -x declared npm build ran LOG.metadata-npm-deploy
-declared npm build ran
-
->>> grep -F validation failed - fix errors before deploying LOG.metadata-npm-deploy
-Error: validation failed - fix errors before deploying
-
-=== Reject a missing package.json
->>> musterr [CLI] apps validate --path missing
-Error: no supported project type detected (looking for package.json)
-
-=== Report native manifest errors with dependencies absent
->>> grep -x Error: validation failed LOG.invalid-absent
-Error: validation failed
-
-=== Report native manifest errors with dependencies present
->>> grep -x Error: validation failed LOG.invalid-present
-Error: validation failed
-
-=== Reject a null manifest through the package manager
->>> grep -x Error: validation failed LOG.null
-Error: validation failed
-
-=== Run scripts from a manifest with a UTF-8 BOM
->>> grep -x BOM build ran LOG.bom
-BOM build ran
-
->>> grep -F validation failed (exit code 17) LOG.bom
-validation failed (exit code 17)
-
-=== Let the package manager ignore non-runnable script entries
->>> grep -x non-runnable entries ignored LOG.non-runnable
-non-runnable entries ignored
-
->>> grep -F validation failed (exit code 17) LOG.non-runnable
-validation failed (exit code 17)
-
-=== Run a build added by install
->>> grep -x added build ran LOG.add-build-install
-added build ran
-
->>> grep -F validation failed (exit code 17) LOG.add-build-install
-validation failed (exit code 17)
-
-=== Skip a build removed by install
->>> grep -F All validation checks passed LOG.remove-build-install
-✅ All validation checks passed ([DURATION])
-
-=== Report native errors after install invalidates the manifest
->>> grep -x Error: validation failed LOG.invalidated-install
-Error: validation failed
-
-=== Run a build added by typegen
->>> grep -x added build ran LOG.add-build-typegen
-added build ran
-
->>> grep -F validation failed (exit code 17) LOG.add-build-typegen
-validation failed (exit code 17)
-
-=== Skip a build removed by typegen
->>> grep -F All validation checks passed LOG.remove-build-typegen
-✅ All validation checks passed ([DURATION])
-
-=== Report native errors after typegen invalidates the manifest
->>> grep -x Error: validation failed LOG.invalidated-typegen
-Error: validation failed
diff --git a/acceptance/apps/validate/script b/acceptance/apps/validate/script
index 4c59e76e046..3f079d8af64 100644
--- a/acceptance/apps/validate/script
+++ b/acceptance/apps/validate/script
@@ -1,4 +1,3 @@
-validation_path="$PATH"
 export PATH="$PWD/bin:$PATH"
 
 title "Validate the directory selected by --path"
@@ -15,82 +14,3 @@ trace VALIDATION_TEST_FAIL="run --if-present build" musterr $CLI apps deploy
 
 title "Commands executed in the project directory"
 trace cat commands.log
-
-title "Warn but continue on conflicting lockfiles"
-trace $CLI apps validate --path conflicting
-
-title "Warn but continue on unsupported lockfiles"
-trace $CLI apps validate --path unsupported
-
-title "Validate npm workspace scripts without root scripts"
-export PATH="$validation_path"
-mkdir -p workspaces/node_modules
-trace musterr $CLI apps validate --path workspaces &> LOG.workspaces
-trace grep -x "workspace build ran" LOG.workspaces
-trace grep -F "validation failed (exit code 17)" LOG.workspaces
-
-title "Deploy rejects a failing npm workspace build"
-trace withdir workspaces musterr $CLI apps deploy &> LOG.workspaces-deploy
-trace grep -x "workspace build ran" LOG.workspaces-deploy
-trace grep -F "validation failed - fix errors before deploying" LOG.workspaces-deploy
-
-title "Use declared npm despite a pnpm lockfile"
-mkdir -p metadata-npm/node_modules
-trace musterr $CLI apps validate --path metadata-npm &> LOG.metadata-npm
-trace grep -x "declared npm build ran" LOG.metadata-npm
-trace grep -F "validation failed (exit code 17)" LOG.metadata-npm
-
-title "Deploy honors the declared package manager"
-trace withdir metadata-npm musterr $CLI apps deploy &> LOG.metadata-npm-deploy
-trace grep -x "declared npm build ran" LOG.metadata-npm-deploy
-trace grep -F "validation failed - fix errors before deploying" LOG.metadata-npm-deploy
-
-title "Reject a missing package.json"
-mkdir missing
-trace musterr $CLI apps validate --path missing
-
-for dependencies in absent present; do
-    title "Report native manifest errors with dependencies $dependencies"
-    trace musterr $CLI apps validate --path invalid &> LOG.invalid-$dependencies
-    contains.py "EJSONPARSE" < LOG.invalid-$dependencies > LOG.check-invalid-$dependencies
-    trace grep -x "Error: validation failed" LOG.invalid-$dependencies
-    mkdir -p invalid/node_modules
-done
-
-title "Reject a null manifest through the package manager"
-mkdir -p null/node_modules
-trace musterr $CLI apps validate --path null &> LOG.null
-trace grep -x "Error: validation failed" LOG.null
-
-title "Run scripts from a manifest with a UTF-8 BOM"
-mkdir -p bom/node_modules
-trace musterr $CLI apps validate --path bom &> LOG.bom
-trace grep -x "BOM build ran" LOG.bom
-trace grep -F "validation failed (exit code 17)" LOG.bom
-
-title "Let the package manager ignore non-runnable script entries"
-mkdir -p non-runnable/node_modules
-trace musterr $CLI apps validate --path non-runnable &> LOG.non-runnable
-trace grep -x "non-runnable entries ignored" LOG.non-runnable
-trace grep -F "validation failed (exit code 17)" LOG.non-runnable
-
-for step in install typegen; do
-    cp -R lifecycle lifecycle-$step
-    if [ "$step" = typegen ]; then
-        mkdir -p lifecycle-$step/{add-build,remove-build,invalidated}/node_modules
-    fi
-
-    title "Run a build added by $step"
-    trace VALIDATION_UPDATE_STEP=$step VALIDATION_UPDATE_ACTION=add musterr $CLI apps validate --path lifecycle-$step/add-build &> LOG.add-build-$step
-    trace grep -x "added build ran" LOG.add-build-$step
-    trace grep -F "validation failed (exit code 17)" LOG.add-build-$step
-
-    title "Skip a build removed by $step"
-    trace VALIDATION_UPDATE_STEP=$step VALIDATION_UPDATE_ACTION=remove $CLI apps validate --path lifecycle-$step/remove-build &> LOG.remove-build-$step
-    trace grep -F "All validation checks passed" LOG.remove-build-$step
-
-    title "Report native errors after $step invalidates the manifest"
-    trace VALIDATION_UPDATE_STEP=$step VALIDATION_UPDATE_ACTION=invalidate musterr $CLI apps validate --path lifecycle-$step/invalidated &> LOG.invalidated-$step
-    contains.py "EJSONPARSE" < LOG.invalidated-$step > LOG.check-invalidated-$step
-    trace grep -x "Error: validation failed" LOG.invalidated-$step
-done
diff --git a/acceptance/apps/validate/test.toml b/acceptance/apps/validate/test.toml
index 76667680b83..aef8c31494f 100644
--- a/acceptance/apps/validate/test.toml
+++ b/acceptance/apps/validate/test.toml
@@ -1,10 +1,6 @@
 EnvMatrix.DATABRICKS_BUNDLE_ENGINE = ["direct"]
 Env.VALIDATION_TEST_FAIL = ""
-Env.npm_config_audit = "false"
-Env.npm_config_fund = "false"
-Env.npm_config_offline = "true"
-Env.npm_config_update_notifier = "false"
-Ignore = ["commands.log", "node_modules", "missing", "lifecycle-install", "lifecycle-typegen"]
+Ignore = ["commands.log"]
 
 [[Repls]]
 Old = '\d+\.\d+s'
diff --git a/acceptance/apps/validate/workspaces/.npmrc b/acceptance/apps/validate/workspaces/.npmrc
deleted file mode 100644
index 76511e68b54..00000000000
--- a/acceptance/apps/validate/workspaces/.npmrc
+++ /dev/null
@@ -1,2 +0,0 @@
-workspaces=true
-update-notifier=false
diff --git a/acceptance/apps/validate/workspaces/databricks.yml b/acceptance/apps/validate/workspaces/databricks.yml
deleted file mode 100644
index 2aecdb5c928..00000000000
--- a/acceptance/apps/validate/workspaces/databricks.yml
+++ /dev/null
@@ -1,2 +0,0 @@
-bundle:
-  name: validation-workspaces
diff --git a/acceptance/apps/validate/workspaces/package.json b/acceptance/apps/validate/workspaces/package.json
deleted file mode 100644
index 87d12a4b24e..00000000000
--- a/acceptance/apps/validate/workspaces/package.json
+++ /dev/null
@@ -1,5 +0,0 @@
-{
-  "name": "validation-workspaces",
-  "private": true,
-  "workspaces": ["packages/*"]
-}
diff --git a/acceptance/apps/validate/workspaces/packages/app/package.json b/acceptance/apps/validate/workspaces/packages/app/package.json
deleted file mode 100644
index ab8149856d5..00000000000
--- a/acceptance/apps/validate/workspaces/packages/app/package.json
+++ /dev/null
@@ -1,7 +0,0 @@
-{
-  "name": "validation-workspace-app",
-  "version": "1.0.0",
-  "scripts": {
-    "build": "node -e \"console.log('workspace build ran'); process.exit(17)\""
-  }
-}