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

tests/test_sync_templates_placeholders.py

@@ -0,0 +1,51 @@
+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):
+    return subprocess.run(
+        [sys.executable, str(SCRIPT), *args],
+        capture_output=True,
+        text=True,
+    )
+
+
+class SyncTemplatesPlaceholdersTests(unittest.TestCase):
+    def test_main_language_placeholder_replaced(self):
+        with tempfile.TemporaryDirectory() as tmp_dir:
+            config_body = f"""
+[playbook]
+project_root = \"{tmp_dir}\"
+
+[sync_templates]
+project_name = \"Demo\"
+full = true
+
+[sync_standards]
+langs = [\"cpp\", \"tsl\"]
+"""
+            config_path = Path(tmp_dir) / "playbook.toml"
+            config_path.write_text(config_body, encoding="utf-8")
+
+            result = run_cli("-config", str(config_path))
+            self.assertEqual(result.returncode, 0, msg=result.stderr)
+
+            agents_md = Path(tmp_dir) / "AGENTS.md"
+            text = agents_md.read_text(encoding="utf-8")
+            self.assertIn(".agents/cpp/index.md", text)
+            self.assertNotIn("{{MAIN_LANGUAGE}}", text)
+
+            rules_md = Path(tmp_dir) / "AGENT_RULES.md"
+            rules_text = rules_md.read_text(encoding="utf-8")
+            self.assertIn("docs/standards/playbook/scripts/plan_progress.py", rules_text)
+            self.assertNotIn("{{PLAYBOOK_SCRIPTS}}", rules_text)
+
+
+if __name__ == "__main__":
+    unittest.main()