diff --git a/src/api/toolchain_routes.py b/src/api/toolchain_routes.py
index dd03218..666708a 100644
--- a/src/api/toolchain_routes.py
+++ b/src/api/toolchain_routes.py
@@ -400,11 +400,6 @@ async def _handle_issues(payload: Dict[str, Any]) -> None:
 
 async def _handle_issue_comment(payload: Dict[str, Any]) -> None:
     """处理 issue_comment 事件：CI 失败关键词 → 通知 PR 作者。"""
-    # DEBUG: dump full payload to file for investigation
-    _debug_payload_dir = Path(get_data_root()) / "_debug"
-    _debug_payload_dir.mkdir(parents=True, exist_ok=True)
-    (_debug_payload_dir / f"issue_comment_payload_{int(time.time())}.json").write_text(
-        json.dumps(payload, ensure_ascii=False, indent=2))
     comment = payload.get("comment")
     if not comment or not isinstance(comment, dict):
         logger.warning("issue_comment event missing comment field, skipping")