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@langchain-ai

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 268 repositories
  • docs Public

    Unified LangChain documentation.

    langchain-ai/docs's past year of commit activity
    MDX 442 MIT 2,781 238 92 Updated Oct 30, 2026
  • open-swe Public

    LangChain's software factory

    langchain-ai/open-swe's past year of commit activity
    Python 11,146 MIT 1,313 0 156 Updated Oct 30, 2026
  • langsmith-cli Public

    A coding agent-first CLI for interacting with LangSmith.

    langchain-ai/langsmith-cli's past year of commit activity
    Go 80 MIT 21 10 60 Updated Oct 30, 2026
  • langgraph Public

    Build resilient agents.

    langchain-ai/langgraph's past year of commit activity
    Python 44,180 MIT 7,602 364 (10 issues need help) 153 Updated Oct 31, 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 19 2 8 Updated Oct 31, 2026
  • langchain-google Public

    🦜🔗 LangChain interfaces to Google's suite of AI products (e.g. Gemini & Vertex AI)

    langchain-ai/langchain-google's past year of commit activity
    Python 406 MIT 500 94 (10 issues need help) 123 Updated Oct 31, 2026
  • deepagents Public

    The batteries-included agent harness.

    langchain-ai/deepagents's past year of commit activity
    Python 30,796 MIT 4,328 177 34 Updated Oct 30, 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 115 Apache-2.0 24 0 4 Updated Oct 30, 2026
  • chat-langchain Public
    langchain-ai/chat-langchain's past year of commit activity
    TypeScript 6,472 MIT 1,491 3 544 Updated Oct 30, 2026
  • langsmith-codex-plugins Public

    LangSmith plugin for OpenAI Codex

    langchain-ai/langsmith-codex-plugins's past year of commit activity
    TypeScript 14 MIT 6 1 7 Updated Oct 30, 2026
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