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LangChain

README.md

The agent engineering platform.

Core OSS libraries:

Commercial Platform:

  • LangSmith – platform for building and monitoring production-grade LLM applications

OSS extensions and apps:

  • Deep Agents Code - dcode is an open-source coding agent in your terminal, similar to Claude Code or Cursor, powered by any LLM
  • Open SWE – open-source asynchronous coding agent
  • OpenWiki - CLI agent for codebase and personal memory wiki generation & maintenance.
  • Agent Protocol – our attempt at codifying the framework-agnostic APIs that are needed to serve LLM agents in production

Learn more

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Repositories

Showing 10 of 265 repositories
  • langsmith-plugin-binary Public

    Shared build, sign, notarize and publish pipeline for the LangSmith plugin repos

    langchain-ai/langsmith-plugin-binary's past year of commit activity
    TypeScript 0 MIT 0 1 5 Updated Oct 10, 2026
  • langgraph Public

    Build resilient agents.

    langchain-ai/langgraph's past year of commit activity
    Python 43,014 MIT 7,308 573 (11 issues need help) 228 Updated Oct 10, 2026
  • langgraphjs Public

    Framework to build resilient language agents as graphs.

    langchain-ai/langgraphjs's past year of commit activity
    TypeScript 3,342 MIT 603 108 93 Updated Oct 10, 2026
  • retrieval-agent-template Public
    langchain-ai/retrieval-agent-template's past year of commit activity
    Python 176 MIT 54 4 4 Updated Oct 10, 2026
  • retrieval-agent-template-js Public template
    langchain-ai/retrieval-agent-template-js's past year of commit activity
    TypeScript 35 MIT 13 0 2 Updated Oct 10, 2026
  • paid-media-agent Public

    Open-source paid media agent for Google Ads, Meta Ads, Reddit, LinkedIn, X, and OpenAI Ads: analysis, reports, and reviewed changes, built on Deep Agents.

    langchain-ai/paid-media-agent's past year of commit activity
    Python 102 Apache-2.0 23 0 0 Updated Oct 10, 2026
  • langsmith-pi-extension Public

    LangSmith PI Extension

    langchain-ai/langsmith-pi-extension's past year of commit activity
    TypeScript 3 MIT 2 0 2 Updated Oct 10, 2026
  • text-to-sql-agent Public
    langchain-ai/text-to-sql-agent's past year of commit activity
    Jupyter Notebook 43 15 0 0 Updated Oct 10, 2026
  • langsmith-claude-code-plugins Public

    LangSmith plugins for Claude Code

    langchain-ai/langsmith-claude-code-plugins's past year of commit activity
    TypeScript 73 MIT 16 0 5 Updated Oct 10, 2026
  • memory-agent-js Public template
    langchain-ai/memory-agent-js's past year of commit activity
    TypeScript 53 MIT 18 1 0 Updated Oct 10, 2026
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