Merge pull request #60 from weijia99/main

update 第九章文档代码

docs/chapter9/第九章 上下文工程.md

@@ -731,7 +731,7 @@ class ContextAwareAgent(SimpleAgent):
             {"role": "system", "content": optimized_context},
             {"role": "user", "content": user_input}
         ]
-        response = self.llm.invoke(optimized_context)
+        response = self.llm.invoke(messages)
 
         # 3. 更新对话历史
         from hello_agents.core.message import Message