test: lock README prose contract

tests/test_repository_contracts.py

@@ -3,6 +3,8 @@ from __future__ import annotations
 import unittest
 from pathlib import Path
 
+from claridoc.style_contracts import first_person_metrics, plain_form_ending_locations
+
 
 ROOT = Path(__file__).resolve().parents[1]
 AUTHOR_SKILL = ROOT / ".agents" / "skills" / "technical-document-author"
@@ -38,6 +40,17 @@ class RepositoryContractTests(unittest.TestCase):
         self.assertIn("independent review", normalized)
         self.assertIn("quality-gate", normalized)
 
+    def test_repository_readme_satisfies_korean_experience_contract(self) -> None:
+        text = (ROOT / "README.md").read_text(encoding="utf-8")
+        metrics = first_person_metrics(text)
+
+        self.assertEqual(plain_form_ending_locations(text), [])
+        self.assertTrue(metrics["opening_has_first_person"])
+        self.assertGreaterEqual(metrics["experience_section_coverage"], 0.5)
+        self.assertIn("STYLE002", text)
+        self.assertIn("STYLE003", text)
+        self.assertIn("examples/briefs/claridoc-readme.json", text)
+
 
 if __name__ == "__main__":
     unittest.main()