diff --git a/src/daemon/spawner.py b/src/daemon/spawner.py
index 62fa7d6..bdd7a61 100644
--- a/src/daemon/spawner.py
+++ b/src/daemon/spawner.py
@@ -1498,6 +1498,9 @@ curl -X POST http://{api_host}:{api_port}/api/projects/{project_id}/tasks/{task_
         db_path: Optional[Path] = None,
     ) -> None:
         """记录 task_attempt"""
+        # 广播 spawn 产生的 "broadcast" task_id 不记录 attempts，避免脏数据
+        if task_id == "broadcast":
+            return
         effective_db = db_path or self.db_path
         if not task_id or not effective_db:
             return