Update agent.py

agent.py

@@ -1,26 +1,20 @@
 import os
 import json
-from dotenv import load_dotenv
-
 import dotenv
+from dotenv import load_dotenv
 from langgraph.graph import START, StateGraph
-from langgraph.prebuilt import tools_condition
-from langgraph.prebuilt import ToolNode
-from langchain_google_genai import ChatGoogleGenerativeAI
+from langgraph.prebuilt import ToolNode,tools_condition
 from langchain_huggingface import HuggingFaceEmbeddings
 from langchain_community.tools.tavily_search import TavilySearchResults
-from langchain_community.document_loaders import WikipediaLoader
-from langchain_community.document_loaders import ArxivLoader
+from langchain_community.document_loaders import WikipediaLoader,ArxivLoader
 from langchain_community.vectorstores import SupabaseVectorStore
-from langchain.tools.retriever import create_retriever_tool
-from langchain_core.messages import HumanMessage, SystemMessage
+from langchain.tools.retriever import create_retriever_tool 
 from langchain_core.tools import tool
 from supabase.client import Client, create_client
 from langchain.chat_models import init_chat_model
 import random
 from typing import Annotated,TypedDict
-from langchain_core.messages import AnyMessage, HumanMessage, AIMessage
-from langgraph.graph.message import add_messages
+from langchain_core.messages import AnyMessage, HumanMessage, AIMessage,add_messages,SystemMessage
 
 
 load_dotenv()