Minimal CopilotKit + LangGraph with AG-UI

https://github.com/jrhicks/minimal-copilotkit-langgraph

• CopilitKit React without NextJS (Vite)
• Self Hosted CopilotKit Runtime with Node.js HTTP
• Self Hosted LangGraph Agent with FastAPI (LangGraph)

CopilotKit UI

• [ ] NextJS
• [x] Vite

CopilotKit Connection

• [ ] Copilot Cloud
• [x] Self-Hosted Copilot Runtime

Self Hosted Copilot Runtime

• [ ] Next.js App Router
• [ ] Next.js Page Router
• [ ] Node.js Express
• [x] Node.js HTTP
• [ ] NestJS

LangGraph Language

• [x] Python
• [ ] Typescript

LangGraph Agent

• [ ] Local (LangGraph Studio)
• [x] Self hosted (FastAPI)
• [ ] LangGraph Platform

AG-UI Features Completed

• [x] 🤖 Agentic Chat
  • [x] Natural Conversation: Chat with your Copilot in a familiar chat interface,
  • [x] Frontend Tool Execution: The Copilot can directly interacts with your UI by calling frontend functions,
  • [x] Seamless Integration: Tools defined in the frontend and automatically discovered and made available to the agent,
  • [x] Tool Based Generative UI - Frontend Rendering of Tool Calls: Backend tool calls are automatically rendered in the UI
  • [x] Pause and Resume Control: Frontend tools can pause agent and agent resumes after user input