Update agent.py

agent.py

@@ -1,24 +1,20 @@
 # GAIA Agent Solution with LangGraph and OpenAI - Standalone Version
 import os
-import operator
 from dotenv import load_dotenv
-import json
-import re
-import requests
-import tempfile
-from typing import TypedDict, Annotated, Sequence, Union
-from langgraph.graph import StateGraph, END
-from langchain_community.utilities import WikipediaAPIWrapper
-from langchain_community.tools import WikipediaQueryRun
-from langchain_core.messages import BaseMessage, HumanMessage, SystemMessage, ToolMessage
-from langchain_openai import ChatOpenAI
-from langchain_core.tools import tool
-from langchain_core.utils.function_calling import convert_to_openai_tool
-from openai import OpenAI
 from langgraph.graph import START, StateGraph, MessagesState
-from langgraph.prebuilt import tools_condition, ToolNode
-from langchain_core.messages import SystemMessage, HumanMessage, AIMessage
+from langgraph.prebuilt import tools_condition
+from langgraph.prebuilt import ToolNode
+from langchain_google_genai import ChatGoogleGenerativeAI
+from langchain_groq import ChatGroq
+from langchain_huggingface import ChatHuggingFace, HuggingFaceEndpoint, 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.vectorstores import SupabaseVectorStore
+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
 load_dotenv()
 
 # --- Supabase Setup (only if credentials are provided) ---