diff --git a/agent/guideline_middleware.py b/agent/guideline_middleware.py
index 6628d9a..b086273 100644
--- a/agent/guideline_middleware.py
+++ b/agent/guideline_middleware.py
@@ -95,7 +95,7 @@ Action: Provide concise, friendly, and personified natural responses.
         if not self.guidelines:
             return None
 
-        guideline_prompt = self.get_guideline_prompt(convert_to_openai_messages(self.messages))
+        guideline_prompt = self.get_guideline_prompt(convert_to_openai_messages(self._origin_messages))
 
         # 准备完整的消息列表
         messages = state['messages'].copy()
@@ -124,7 +124,7 @@ Action: Provide concise, friendly, and personified natural responses.
         if not self.guidelines:
             return None
         
-        guideline_prompt = self.get_guideline_prompt(convert_to_openai_messages(self.messages))
+        guideline_prompt = self.get_guideline_prompt(convert_to_openai_messages(self._origin_messages))
         
         # 准备完整的消息列表
         messages = state['messages'].copy()