LangGraph.js
Open-source agent harness from LangChain for building agents with code, with LangSmith for testing and monitoring.
Harness by LangChain
Install
From the package registry. Read the repository before you give any tool access to your data.
npm install @langchain/langgraph
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About
Use cases: agent-orchestration
Reviews
Write a reviewNo reviews yet. Installed it? Reviews come from verified installers only. How reviews work
Fact sheet
- Languages
- TypeScript
- Packages
- @langchain/langgraph (npm)
- Observability
- LangSmithdocs.langchain.com
- Maturity
- Stablegithub.com
Facts extracted by Claude Haiku 5.5 from the linked sources on Oct 24, 2026. Wrong fact? Tell us.
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Featured in
Signals
- Stars
- 3,370
- Forks
- 615
- Open issues
- 85
- Weekly downloads
- 2,326,897
- Last commit
- Oct 22, 2026 (4 days ago)
- Last release
- Oct 22, 2026 (4 days ago)
- Last package publish
- Oct 21, 2026 (5 days ago)
From GitHub (fetched Oct 24, 2026) and the package registry.
Details
- Packages
- npm
@langchain/langgraph - License
- MIT
- Repository
- github.com/langchain-ai/langgraphjs
- First seen
- Oct 24, 2026
- Last checked
- Oct 24, 2026
- Source
- DocsREADMEgithub-graphql
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Cite this page
LangGraph.js. Agent Mart. https://agentmart.dev/harnesses/langgraph-js (last updated 2026-10-24)