docs: apply Korean prose contract to README

tests/test_schemas.py

@@ -28,6 +28,9 @@ class SchemaTests(unittest.TestCase):
         brief_data = json.loads(
             (ROOT / "examples" / "briefs" / "retry-policy-blog.json").read_text(encoding="utf-8")
         )
+        readme_brief_data = json.loads(
+            (ROOT / "examples" / "briefs" / "claridoc-readme.json").read_text(encoding="utf-8")
+        )
         sources_data = json.loads(
             (ROOT / "examples" / "sources" / "retry-policy-sources.json").read_text(encoding="utf-8")
         )
@@ -35,8 +38,13 @@ class SchemaTests(unittest.TestCase):
         multi_config_data = json.loads(
             (ROOT / "config" / "pipeline.multi-agent.example.json").read_text(encoding="utf-8")
         )
+        brief_schema = json.loads(
+            (ROOT / "schemas" / "brief.schema.json").read_text(encoding="utf-8")
+        )
 
         self.assertTrue(Brief.from_dict(brief_data).title)
+        self.assertEqual(Brief.from_dict(readme_brief_data).document_type.value, "readme")
+        jsonschema.Draft202012Validator(brief_schema).validate(readme_brief_data)
         self.assertGreaterEqual(len(SourcePack.from_dict(sources_data).sources), 1)
         self.assertEqual(PipelineConfig.from_dict(mock_config_data).writer.provider, "mock")
         self.assertEqual(PipelineConfig.from_dict(multi_config_data).writer.provider, "claude")