✨ feat(playbook): add plan progress tracking and rules updates

tests/test_format_md_action.py

@@ -0,0 +1,58 @@
+import os
+import subprocess
+import sys
+import tempfile
+import unittest
+from pathlib import Path
+
+ROOT = Path(__file__).resolve().parents[1]
+SCRIPT = ROOT / "scripts" / "playbook.py"
+
+
+def run_cli(*args, env=None):
+    return subprocess.run(
+        [sys.executable, str(SCRIPT), *args],
+        capture_output=True,
+        text=True,
+        env=env,
+    )
+
+
+class FormatMdActionTests(unittest.TestCase):
+    def test_format_md_invokes_prettier_from_path(self):
+        with tempfile.TemporaryDirectory() as tmp_dir:
+            root = Path(tmp_dir)
+            (root / "README.md").write_text("# Title\n", encoding="utf-8")
+
+            bin_dir = root / "bin"
+            bin_dir.mkdir()
+            prettier = bin_dir / "prettier"
+            prettier.write_text(
+                "#!/usr/bin/env python3\n"
+                "from pathlib import Path\n"
+                "Path(\".prettier_called\").write_text(\"ok\")\n",
+                encoding="utf-8",
+            )
+            prettier.chmod(0o755)
+
+            config_body = f"""
+[playbook]
+project_root = \"{tmp_dir}\"
+
+[format_md]
+# tool defaults to prettier
+# keep default globs
+"""
+            config_path = root / "playbook.toml"
+            config_path.write_text(config_body, encoding="utf-8")
+
+            env = os.environ.copy()
+            env["PATH"] = f"{bin_dir}:{env.get('PATH', '')}"
+
+            result = run_cli("-config", str(config_path), env=env)
+            self.assertEqual(result.returncode, 0, msg=result.stderr)
+            self.assertTrue((root / ".prettier_called").exists())
+
+
+if __name__ == "__main__":
+    unittest.main()