diff --git a/backend/ai-core/cmd/main.go b/backend/ai-core/cmd/main.go
index 1942afc..16c85c4 100644
--- a/backend/ai-core/cmd/main.go
+++ b/backend/ai-core/cmd/main.go
@@ -465,6 +465,9 @@ func main() {
 			return
 		}
 		// 通过 thinker 的主动消息机制推送
+		if userID == "" {
+			userID = adminUserID
+		}
 		thinker.TriggerReminderMessage(userID, sessionID, fmt.Sprintf("🔧 %s 执行完成：%s", toolName, result))
 	})