CopilotKit <> LangGraph Starter

This is a starter template for building AI agents using LangGraph and CopilotKit. It provides a modern Next.js application with an integrated LangGraph agent to be built on top of.

Prerequisites

• Node.js 18+
• Python 3.8+
• Any of the following package managers:
  • pnpm (recommended)
  • npm
  • yarn
  • bun
• OpenAI API Key (for the LangGraph agent)

Note: This repository ignores lock files (package-lock.json, yarn.lock, pnpm-lock.yaml, bun.lockb) to avoid conflicts between different package managers. Each developer should generate their own lock file using their preferred package manager. After that, make sure to delete it from the .gitignore.

Getting Started

1. Install dependencies using your preferred package manager:

# Using pnpm (recommended)
pnpm install

# Using npm
npm install

# Using yarn
yarn install

# Using bun
bun install

2. Install dependencies for the LangGraph agent:

cd agent

# Using pnpm (recommended)
pnpm install 

# Using npm
npm run install

# Using yarn
yarn install

# Using bun
bun run install

3. Set up your OpenAI API key:

cd agent
echo "OPENAI_API_KEY=your-openai-api-key-here" > .env

4. Start the development server:

# Using pnpm (recommended)
pnpm dev

# Using npm
npm run dev

# Using yarn
yarn dev

# Using bun
bun run dev

This will start both the UI and agent servers concurrently.

Available Scripts

The following scripts can also be run using your preferred package manager:

• dev - Starts both UI and agent servers in development mode
• dev:studio - Starts the UI and agent with LangGraph Studio
• dev:debug - Starts development servers with debug logging enabled
• dev:ui - Starts only the Next.js UI server
• dev:agent - Starts only the LangGraph agent server
• dev:agent:studio - Starts the LangGraph agent server with LangGraph Studio
• build - Builds the Next.js application for production
• start - Starts the production server
• lint - Runs ESLint for code linting
• install:agent - Installs Python dependencies for the agent

Documentation

The main UI component is in src/app/page.tsx. You can:

• Modify the theme colors and styling
• Add new frontend actions
• Utilize shared-state
• Customize your user-interface for interactin with LangGraph

📚 Documentation

• CopilotKit Documentation - Explore CopilotKit's capabilities
• LangGraph Documentation - Learn more about LangGraph and its features
• Next.js Documentation - Learn about Next.js features and API

Contributing

Feel free to submit issues and enhancement requests! This starter is designed to be easily extensible.

License

This project is licensed under the MIT License - see the LICENSE file for details.

Troubleshooting

Agent Connection Issues

If you see "I'm having trouble connecting to my tools", make sure:

1. The LangGraph agent is running on port 8000
2. Your OpenAI API key is set correctly
3. Both servers started successfully