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LangChain

README.md

The agent engineering platform.

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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 264 repositories
  • docs Public

    Unified LangChain documentation.

    langchain-ai/docs's past year of commit activity
    MDX 421 MIT 2,725 240 107 Updated Sep 30, 2026
  • langsmith-sdk Public

    LangSmith Client SDK Implementations

    langchain-ai/langsmith-sdk's past year of commit activity
    Python 1,065 MIT 304 120 123 Updated Sep 30, 2026
  • helm Public

    Repository hosting Langchain helm charts.

    langchain-ai/helm's past year of commit activity
    Shell 96 Apache-2.0 48 4 51 Updated Sep 30, 2026
  • langchain-aws Public

    Build LangChain Applications on AWS

    langchain-ai/langchain-aws's past year of commit activity
    Python 350 MIT 311 62 (1 issue needs help) 45 Updated Sep 29, 2026
  • langchainjs Public

    The agent engineering platform

    langchain-ai/langchainjs's past year of commit activity
    TypeScript 18,241 MIT 3,401 243 (2 issues need help) 367 Updated Sep 30, 2026
  • macaw-design-system Public

    Shared design system for LangChain products

    langchain-ai/macaw-design-system's past year of commit activity
    TypeScript 8 MIT 0 0 6 Updated Sep 30, 2026
  • langchain-mongodb Public

    Integrations between MongoDB, Atlas, LangChain, and LangGraph

    langchain-ai/langchain-mongodb's past year of commit activity
    Python 124 MIT 66 10 17 Updated Sep 30, 2026
  • open-swe Public

    An Open-Source Asynchronous Coding Agent

    langchain-ai/open-swe's past year of commit activity
    Python 10,773 MIT 1,290 0 111 Updated Sep 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 76 MIT 19 10 55 Updated Sep 30, 2026
  • deepagents Public

    The batteries-included agent harness.

    langchain-ai/deepagents's past year of commit activity
    Python 29,862 MIT 4,199 157 23 Updated Sep 30, 2026
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