diff --git a/py/api/admin.py b/py/api/admin.py
index 8175854..206792e 100644
--- a/py/api/admin.py
+++ b/py/api/admin.py
@@ -1506,6 +1506,7 @@ class AdminRoutesMixin:
                 try:
                     canonical[key] = json.loads(canonical[key])
                 except (ValueError, TypeError):
+                    # Preserve malformed metadata for conservative resolver rejection.
                     pass
         if not canonical.get("prompt") and not canonical.get("parameters"):
             return None
diff --git a/tests/test_prompt_pairs.py b/tests/test_prompt_pairs.py
index c219d82..5fb880a 100644
--- a/tests/test_prompt_pairs.py
+++ b/tests/test_prompt_pairs.py
@@ -253,13 +253,15 @@ class TestPromptPairs(unittest.TestCase):
 
     def test_connection_helpers_leave_commit_and_rollback_to_the_caller(self):
         conn = self.db.model.get_connection()
-        with self.assertRaisesRegex(RuntimeError, "rollback"):
+
+        def rollback_transaction():
             with conn:
                 conn.execute("BEGIN IMMEDIATE")
                 self.db._save_pair(conn, "transient", "temporary", tags=["tag"])
-                with self.assertRaisesRegex(RuntimeError, "own transaction"):
-                    self.save()
+                self.assertRaisesRegex(RuntimeError, "own transaction", self.save)
                 raise RuntimeError("rollback")
+
+        self.assertRaisesRegex(RuntimeError, "rollback", rollback_transaction)
         self.assertEqual(self.db.list_prompt_pairs()["total"], 0)
         self.assertEqual(self.db.search_prompts(), [])
 
diff --git a/tools/preview-prompt-timeline.py b/tools/preview-prompt-timeline.py
index 2510c78..bb3b1ed 100644
--- a/tools/preview-prompt-timeline.py
+++ b/tools/preview-prompt-timeline.py
@@ -40,6 +40,7 @@ if __name__ == "__main__":
     try:
         server.serve_forever()
     except KeyboardInterrupt:
+        # Ctrl+C exits normally; the finally block closes the listening socket.
         pass
     finally:
         server.server_close()