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langchain

The agent engineering platform.

GitHubdocs.langchain.com/langchain/
agentsaiai-agentsanthropicchatgptdeepagentsenterpriseframeworkgeminigenerative-ailangchainlanggraphllmmultiagentopenaiopen-sourcepydanticpythonragtypescript
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16,584commits
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Tech stack & purpose

LangChain is an agent engineering platform built as a Python monorepo with multiple independently versioned packages. The project provides primitives, base abstractions, and concrete implementations for building with large language models and agents, organized into core abstractions, high-level utilities, and integrations with third-party services including OpenAI, Anthropic (Claude), Ollama, and others. The tech stack centers on Python, using `uv` for dependency management, `pytest` for testing, `ruff` for linting and formatting, and `mypy` for static type checking, alongside frameworks and libraries like Pydantic.

Community & reference links

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Python
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Contributors (top 30 of 3,601)