diff --git a/.github/workflows/profile-checks.yml b/.github/workflows/profile-checks.yml
new file mode 100644
index 0000000..d90a214
--- /dev/null
+++ b/.github/workflows/profile-checks.yml
@@ -0,0 +1,30 @@
+name: Profile checks
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  parity:
+    runs-on: ${{ matrix.os }}
+    timeout-minutes: 10
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: '3.12'
+      - run: python -m pip install pytest
+      - name: Check profile parity and privacy boundaries
+        env:
+          PROFILE_PRIVATE_REPO_DENYLIST: ${{ secrets.PROFILE_PRIVATE_REPO_DENYLIST }}
+        run: python -m pytest -q
diff --git a/tests/test_private_guard.py b/tests/test_private_guard.py
new file mode 100644
index 0000000..9dce7ce
--- /dev/null
+++ b/tests/test_private_guard.py
@@ -0,0 +1,21 @@
+"""Synthetic checks for the externally configured profile privacy guard."""
+import pytest
+
+from test_profile_parity import check_public_profile
+
+
+def test_public_links_checked_without_private_inventory(monkeypatch):
+    monkeypatch.delenv("PROFILE_PRIVATE_REPO_DENYLIST", raising=False)
+    check_public_profile("https://github.com/dev-bricks/CodeBox")
+    with pytest.raises(AssertionError, match="unlisted repository"):
+        check_public_profile("https://github.com/dev-bricks/synthetic-unlisted")
+
+
+@pytest.mark.parametrize("separator", [",", ";", "\n", " "])
+def test_configured_guard_redacts_failure(monkeypatch, separator):
+    name = "synthetic-private-project"
+    monkeypatch.setenv("PROFILE_PRIVATE_REPO_DENYLIST", f"other{separator}{name}")
+    with pytest.raises(AssertionError) as caught:
+        check_public_profile(name.upper())
+    assert name not in str(caught.value).casefold()
+    check_public_profile("Ordinary public profile text")
diff --git a/tests/test_profile_parity.py b/tests/test_profile_parity.py
index daaa97b..848a99f 100644
--- a/tests/test_profile_parity.py
+++ b/tests/test_profile_parity.py
@@ -1,5 +1,6 @@
 """Text and link parity checks for dev-bricks organization profile, inventory, and public metadata."""
 
+import os
 import re
 from pathlib import Path
 import pytest
@@ -31,12 +32,15 @@
     ".github",
 ]
 
-PRIVATE_REPOS_DENYLIST = [
-    "automation-master",
-    "githubbot",
-    "ralph-loop-codex-marketplace",
-    "trusted-peer-setup",
-]
+def check_public_profile(text):
+    """Check public links and an optional externally supplied private inventory."""
+    public_names = {name.casefold() for name in PUBLIC_REPOS}
+    links = re.findall(r'https://github\.com/dev-bricks/([^/\s)#?"<>]+)', text)
+    if any(name.casefold() not in public_names for name in links):
+        raise AssertionError("Profile contains an unlisted repository link")
+    private_names = re.split(r"[\s,;]+", os.environ.get("PROFILE_PRIVATE_REPO_DENYLIST", ""))
+    if any(name and name.casefold() in text.casefold() for name in private_names):
+        raise AssertionError("Profile contains a prohibited repository reference")
 
 PUBLIC_ACTIVITY_DATES = {
     ".github": "2026-10-01",
@@ -94,13 +98,9 @@ def test_public_repo_inventory(file_contents):
 
 
 def test_zero_private_leak_guard(file_contents):
-    """Zero-leak invariant: ensure private repos are NEVER leaked into public profile surfaces."""
+    """Check public links and any externally configured private-name guard."""
     for filename in ["README.md", "profile/README.md", "profile/README_de.md", "llms.txt"]:
-        text = file_contents[filename]
-        for private_repo in PRIVATE_REPOS_DENYLIST:
-            assert private_repo not in text, (
-                f"SECURITY VIOLATION: Private repository '{private_repo}' leaked into public file {filename}!"
-            )
+        check_public_profile(file_contents[filename])
 
 
 def test_check_timestamp_parity(file_contents):