md-naming: keep stale.py as no-op stub

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

md_naming/stale.py

@@ -0,0 +1,18 @@
+"""Retired: kept as a no-op so old CI steps keep passing.
+
+TODO*.md files are banned and tasks live in the todo app, so there is nothing
+left to warn about. Existing `.github/workflows/md-naming.yml` steps still call
+`python3 .utils/md_naming/stale.py ...`; this stub accepts and ignores any argv,
+prints nothing and exits 0 until those steps are swept out of every repo.
+"""
+
+from __future__ import annotations
+
+
+def main() -> int:
+    """Do nothing, successfully."""
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())

md_naming/tests/test_stale.py

@@ -0,0 +1,25 @@
+"""stale.py is a retired no-op; old workflow steps must keep passing."""
+
+from __future__ import annotations
+
+import subprocess
+import sys
+from pathlib import Path
+
+from md_naming import stale
+
+STALE = Path(__file__).resolve().parents[1] / "stale.py"
+
+
+def test_stub_exits_zero_silently_with_any_args() -> None:
+    result = subprocess.run(
+        [sys.executable, str(STALE), "--days", "30", "junk", "--nope"],
+        capture_output=True,
+        text=True,
+        check=False,
+    )
+    assert (result.returncode, result.stdout, result.stderr) == (0, "", "")
+
+
+def test_main_returns_zero() -> None:
+    assert stale.main() == 0