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CopilotKit

Open-source SDK that connects AI agents to app front ends with chat UI, generative UI, shared state and human approvals; creator of the AG-UI protocol.

Harness by CopilotKit

IndexedMIT★ 38,211
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Install

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npm install @copilotkit/react-core

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About

CopilotKit is a frontend layer between agents and users, aimed at React, Angular, Vue and React Native apps and at Slack and Microsoft Teams. Its features include a chat UI with streaming, backend tool rendering, generative UI, shared state between agent and UI, and human-in-the-loop pauses for input or confirmation. It works with several agent backends such as Mastra, Google ADK, PydanticAI, CrewAI and LlamaIndex. A commercial add-on, CopilotKit Intelligence, adds persistent threads, user memories and automatic learning.

Use cases: frontend-development, agent-orchestration

Reviews

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Fact sheet

Languages
TypeScriptREADME
Packages
@copilotkit/react-core (npm), copilotkit (npm)README
MCP support
Built incopilotkit.ai
Streaming
YesREADME
Memory
long-termREADME
Human in the loop
YesREADME
Deploys to
self-hostedcopilotkit.ai
Maturity
Betagithub.com

Facts extracted by Claude Sonnet 5.5 from the linked sources on Oct 24, 2026; reviewed Oct 24, 2026. Wrong fact? Tell us.

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Signals

Stars
38,211
Forks
4,769
Open issues
105
Weekly downloads
286,211
Last commit
Oct 24, 2026 (3 days ago)
Last release
Oct 16, 2026 (12 days ago)
Last package publish
Oct 15, 2026 (12 days ago)

From GitHub (fetched Oct 24, 2026) and the package registry.

Details

Packages
npm @copilotkit/react-corenpm copilotkit
License
MIT
Repository
github.com/CopilotKit/CopilotKit
Website
www.copilotkit.ai/
Docs
docs.copilotkit.ai/
First seen
Oct 24, 2026
Last checked
Oct 24, 2026
Source
READMEWebsiteDocsgithub-graphql

More from CopilotKit

Cite this page

CopilotKit. Agent Mart. https://agentmart.dev/harnesses/copilotkit (last updated 2026-10-24)