GitHub - CopilotKit/CopilotKit: The Frontend Stack for Agents & Generative UI. React, Angular, Mobile, Slack, and more. Makers of the AG-UI Protocol

What is CopilotKit

CopilotKit is a best-in-class SDK for building full-stack agentic applications, Generative UI, and chat applications.

What started as a React library is now a multi-platform agentic framework: the same agent can power your web app, your mobile app, and your team's Slack workspace.

We are the company behind the AG-UI Protocol - adopted by Google, LangChain, AWS, Microsoft, Mastra, PydanticAI, and more!

Quick Start

Up and running in under five minutes. All you need is an LLM key (OpenAI, Anthropic, Gemini, etc.).

npx copilotkit@latest create

Agent Skills

CopilotKit ships agent skills that teach your coding agent (Claude Code, Codex, Cursor, Gemini, and others) how to set up, build with, integrate, debug, and upgrade CopilotKit.

Install them into any project directory:

npx copilotkit@latest skills install

Run it again any time to refresh to the latest skills.

Bring Your App to Life

Add AI to your app in 1 minute

Features:

• Chat UI – A fully customizable chat interface that supports message streaming, tool calls, and agent responses.
• Backend Tool Rendering – Enables agents to call backend tools that return UI components rendered directly in the client.
• Generative UI – Allows agents to generate and update UI components dynamically at runtime based on user intent and agent state.
• Shared State – A synchronized state layer that both agents and UI components can read from and write to in real time.
• Human-in-the-Loop – Lets agents pause execution to request user input, confirmation, or edits before continuing.
• Self-Learning (early access) – Agents that continuously improve from user feedback via in-context reinforcement learning (CLHF).

🧩 Works With Your Stack

One agent backend. Every frontend.

Your agent logic stays the same — AG-UI handles the wire protocol, CopilotKit handles the UI layer for each framework.

💬 Beyond the Browser: Slack & Microsoft Teams (Discord, Google Chat coming soon...)

Your agents can run and generate Generative UI beyond the web app (Learn more).

CopilotKit now lets you deploy the same agent to the places your users already work:

• Slack – Agents as first-class Slack apps: threads, tool calls, and human-in-the-loop approvals right in the channel.
• Microsoft Teams – Bring agentic workflows to the enterprise, where your org already lives.

🔒 Early access: We're onboarding teams now.

👉 Request early access →

🧠 Self-Learning Agents

Improve your procuct by learning over time.

With Continuous Learning from Human Feedback (CLHF), part of the CopilotKit Intelligence Platform, agents improve with every interaction:

• In-context reinforcement learning – Agents automatically improve from user interactions, no model fine-tuning required.
• Automatic prompt augmentation – Agent behavior adapts based on recent interactions and outcomes.
• Per-user adaptation – Agents learn individual preferences and get better for each user over time.
• Threads & persistence – Full interaction history — generative UI, human-in-the-loop, shared state — captured across sessions.

Available via CopilotKit Cloud or self-hosted.

🔒 Early access: We're onboarding teams now.

👉 Request early access →

What this gives you:

• CopilotKit installed – Core packages are fully set up in your app
• Provider configured – Context, state, and hooks ready to use
• Agent <> UI connected – Agents can stream actions and render UI immediately
• Deployment-ready – Your app is ready to deploy

Complete getting started guide →

How it works:

CopilotKit connects your UI, agents, and tools into a single interaction loop.

This enables:

• Agents that ask users for input
• Tools that render UI
• Stateful workflows across steps and sessions
• One agent, deployed across web, mobile, and chat platforms

⭐️ useAgent Hook

The useAgent hook sits directly on AG-UI, giving you full programmatic control over the agent connection.

// Programmatically access and control your agents
const { agent } = useAgent({ agentId: "my_agent" });

// Render and update your agent's state
return <div>
  <h1>{agent.state.city}</h1>
  <button onClick={() => agent.setState({ city: "NYC" })}>
    Set City
  </button>
</div>

Check out the useAgent docs to learn more.

Generative UI

Generative UI is a core CopilotKit pattern that allows agents to dynamically render UI as part of their workflow.

Compare the Three Types

Explore:

• Static (AG-UI Protocol)
• Declarative (A2UI)
• Open-Ended (MCP Apps & Open JSON)

Generative UI educational repo →

🖥️ AG-UI: The Agent–User Interaction Protocol

Connect agent workflows to user-facing apps, with deep partnerships and 1st-party integrations across the agentic stack—including LangChain, CrewAI, Mastra, PydanticAI, and more.

npx create-ag-ui-app my-agent-app

Learn more in the AG-UI README →

🤝 Community

• What's New

Have questions or need help?

Join our Discord →
Read the Docs →
Try the Enterprise Intelligence Platform →

Stay up to date with our latest releases!

Follow us on LinkedIn →
Follow us on X →

🙋🏽‍♂️ Contributing

Thanks for your interest in contributing to CopilotKit! 💜

We value all contributions, whether it's through code, documentation, creating demo apps, or just spreading the word.

Here are a few useful resources to help you get started:

• For code contributions, CONTRIBUTING.md.

• For documentation-related contributions, check out the documentation contributions guide.

• Want to contribute but not sure how? Join our Discord and we'll help you out!

📄 License

This repository's source code is available under the MIT License.