From 316d027aabd6d0b20e45946fb952dcd358c450f7 Mon Sep 17 00:00:00 2001
From: zcr <cgzhou@aidlab.hk>
Date: Tue, 19 May 2026 11:45:23 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BF=AE=E5=A4=8D=E5=AF=B9=E8=AF=9D=E8=83=8C?=
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---
 src/routers/deep_agent_chat.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/routers/deep_agent_chat.py b/src/routers/deep_agent_chat.py
index d77896b..1f84054 100755
--- a/src/routers/deep_agent_chat.py
+++ b/src/routers/deep_agent_chat.py
@@ -130,6 +130,7 @@ async def chat_stream(request: DeepAgentChatRequest):
 
     # 5. 初始化系统消息
     initial_messages = []
+    design_backend = ""
     if not source_thread_id or is_branching:
         cp = request.config_params
         if cp: