Update langgraph_agent.py

langgraph_agent.py

@@ -107,7 +107,8 @@ def build_graph(provider: str = "gemini"):
     llm_with_tools = llm.bind_tools(tools)
 
     def assistant(state: MessagesState):
-        return {"messages": [llm_with_tools.invoke(state["messages"])]}
+        messages_to_send = [sys_msg] + state["messages"]
+        return {"messages": [llm_with_tools.invoke(messages_to_send)]}
 
     builder = StateGraph(MessagesState)
     builder.add_node("assistant", assistant)