CopilotKit
Frontend stack for agent-native apps. React hooks, prebuilt copilot UI, AG-UI runtime, frontend tools, shared state, and human-in-the-loop flows.
CopilotKit is an open-source frontend and runtime layer for bringing AI agents into real applications. It gives React and Angular apps hooks, chat/sidebar/popup UI, frontend tools, shared app-agent state, human-in-the-loop interactions, and an app-server runtime that talks to agent backends through AG-UI. The important distinction: CopilotKit is not primarily your backend planner. It is the layer that lets a Mastra, LangGraph, CrewAI, Pydantic AI, Microsoft Agent Framework, or custom AG-UI agent operate inside your product UI with state awareness and user approval. Use it when a dashboard, editor, research canvas, support console, or workflow app needs an agent that can see and act on the live interface instead of sitting in a disconnected chat box.
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Frontend stack for agent-native apps. React hooks, prebuilt copilot UI, AG-UI runtime, frontend tools, shared state, and human-in-the-loop flows.
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The TypeScript toolkit for building AI apps. Unified API across OpenAI, Anthropic, Google. Streaming, tool calling, structured output, multi-step agents. 50K+ GitHub stars.
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