Update agent.py

agent.py

@@ -15,6 +15,7 @@ from langchain_core.messages import SystemMessage, HumanMessage
 from langchain_core.tools import tool
 from langchain.tools.retriever import create_retriever_tool
 from supabase.client import Client, create_client
+from langchain_community.schema import Document
 
 load_dotenv()