feat. Enforce repo review config

tests/test_review_format.py

@@ -55,3 +55,28 @@ def test_format_result_comment_appends_usage_note_for_fallback_layout() -> None:
         },
     )
     assert body.endswith("_Note: model `gpt-5.3-codex`, total `88` tokens used._")
+
+
+def test_format_result_comment_appends_missing_config_note_for_system_layout() -> None:
+    body = format_result_comment(
+        "ff0011",
+        {
+            "verdict": "correct",
+            "confidence": 0.8,
+            "summary": "No issues.",
+            "findings": [],
+        },
+        repo_configured=False,
+    )
+    assert body.endswith("ℹ️.codex-review.yml is not configured")
+
+
+def test_format_result_comment_does_not_append_missing_config_note_to_agent_markdown() -> None:
+    body = format_result_comment(
+        "ff0011",
+        {
+            "markdown_comment": "## Codex Review\n\nLooks fine.",
+        },
+        repo_configured=False,
+    )
+    assert "ℹ️.codex-review.yml is not configured" not in body