fix web errors

web/agent/pyproject.toml

@@ -16,5 +16,4 @@ dependencies = [
     "docstring-parser>=0.17.0",
     "jsonschema>=4.25.1",
     "copilotkit>=0.1.0",
-    "ag-ui-langgraph>=0.0.4",
 ]

web/agent/server.py

@@ -1,5 +1,5 @@
 """
-Self-hosted LangGraph agent server using CopilotKit AG-UI protocol.
+Self-hosted LangGraph agent server using CopilotKit remote endpoint protocol.
 """
 
 import os
@@ -7,23 +7,24 @@ from fastapi import FastAPI
 import uvicorn
 from dotenv import load_dotenv
 
-from copilotkit import LangGraphAGUIAgent
-from ag_ui_langgraph import add_langgraph_fastapi_endpoint
+from copilotkit import CopilotKitRemoteEndpoint, LangGraphAgent
+from copilotkit.integrations.fastapi import add_fastapi_endpoint
 from main import graph
 
 load_dotenv()
 
 app = FastAPI(title="Cavepedia Agent")
 
-add_langgraph_fastapi_endpoint(
-    app=app,
-    agent=LangGraphAGUIAgent(
-        name="vpi_1000",
-        description="AI assistant with access to cave-related information through the Cavepedia MCP server",
-        graph=graph,
-    ),
-    path="/",
+sdk = CopilotKitRemoteEndpoint(
+    agents=[
+        LangGraphAgent(
+            name="vpi_1000",
+            description="AI assistant with access to cave-related information through the Cavepedia MCP server",
+            graph=graph,
+        )
+    ]
 )
+add_fastapi_endpoint(app, sdk, "/copilotkit")
 
 
 @app.get("/health")