Update agent.py

agent.py

@@ -15,7 +15,8 @@ from langchain_core.tools import tool
 from langchain.tools.retriever import create_retriever_tool
 from supabase.client import Client, create_client
 from typing import TypedDict, List, Annotated
-import operator
+from langchain.vectorstores import Chroma
+from langchain.agents.agent_toolkits import create_retriever_tool
 
 load_dotenv()