diff --git a/.github/workflows/profile-checks.yml b/.github/workflows/profile-checks.yml
new file mode 100644
index 0000000..60f6cca
--- /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:
+          DOC_BRICKS_PRIVATE_REPOS: ${{ secrets.DOC_BRICKS_PRIVATE_REPOS }}
+        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..606ef1b
--- /dev/null
+++ b/tests/test_private_guard.py
@@ -0,0 +1,13 @@
+"""Check that a privacy failure does not echo the configured private name."""
+import pytest
+
+import test_profile_parity as profile
+
+
+def test_private_name_is_absent_from_failure(monkeypatch):
+    name = "synthetic-private-sentinel-62941"
+    monkeypatch.setenv(profile.PRIVATE_REPOS_ENV, name)
+    monkeypatch.setattr(profile, "get_file_content", lambda _path: name)
+    with pytest.raises(AssertionError) as caught:
+        profile.test_private_repo_leak_guard()
+    assert name not in str(caught.value)
diff --git a/tests/test_profile_parity.py b/tests/test_profile_parity.py
index 617383b..61de874 100644
--- a/tests/test_profile_parity.py
+++ b/tests/test_profile_parity.py
@@ -96,7 +96,8 @@ def test_private_repo_leak_guard():
     for rel_path in target_files:
         content = get_file_content(rel_path)
         for private_repo in private_repos:
-            assert private_repo not in content, "Private repository name found in public docs"
+            if private_repo in content:
+                raise AssertionError("Private repository name found in public docs")
 
 def test_check_timestamp_parity():
     """Verify verification date 2026-10-13 across profile files."""