persist state

app.py

@@ -163,15 +163,25 @@ compiled_graph = uncompiled_graph.compile()
 @cl.on_chat_start
 async def start():
     cl.user_session.set("graph", compiled_graph)
+    cl.user_session.set("messages", [])  # Inicializar historial de mensajes
 
 @cl.on_message
 async def handle(message: cl.Message):
     graph = cl.user_session.get("graph")
+    
+    # Recuperar historial de mensajes
+    messages = cl.user_session.get("messages")
+    messages.append(HumanMessage(content=message.content))
+
     state = {
-        "messages": [HumanMessage(content=message.content)],
+        "messages": messages,
         "question": message.content, 
-        "context": []  
+        "context": []
     }
 
     response = await graph.ainvoke(state)
-    await cl.Message(content=response["messages"][-1].content).send()
+    
+    # Guardar historial actualizado en la sesión
+    cl.user_session.set("messages", state["messages"])
+
+    await cl.Message(content=response["messages"][-1].content).send()