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On this page

Repository Structure
====================

If you plan on contributing to LangChain code or documentation, it can be useful to understand the high level structure of the repository.

LangChain is organized as a [monorepo](https://en.wikipedia.org/wiki/Monorepo) that contains multiple packages.

Here's the structure visualized as a tree:

    .├── docs│   ├── core_docs # Contains content for the documentation here: https://js.langchain.com/│   ├── api_refs # Contains content for the API refs here: https://v02.api.js.langchain.com/├── langchain # Main package│   ├── src/**/tests/*.test.ts/ # Unit tests (present in each package not shown for brevity)│   ├── src/**/tests/*.int.test.ts/ # Integration tests (present in each package not shown for brevity)├── langchain # Base interfaces for key abstractions├── libs # Community packages│   ├── langchain-community # Third-party integrations│   ├── langchain-partner-1│   ├── langchain-partner-2│   ├── ...

The root directory also contains the following files:

*   `package.json`: Dependencies for building docs and linting docs.

There are other files in the root directory level, but their presence should be self-explanatory. Feel free to browse around!

Documentation[​](#documentation "Direct link to Documentation")
---------------------------------------------------------------

The `/docs` directory contains the content for the documentation that is shown at [https://js.langchain.com/](https://js.langchain.com/) and the associated API Reference [https://v02.api.js.langchain.com/](https://v02.api.js.langchain.com/)

See the [documentation](/v0.2/docs/contributing/documentation/style_guide) guidelines to learn how to contribute to the documentation.

Code[​](#code "Direct link to Code")
------------------------------------

The `/libs` directory contains the code for the LangChain packages.

To learn more about how to contribute code see the following guidelines:

*   [Code](/v0.2/docs/contributing/code) Learn how to develop in the LangChain codebase.
*   [Integrations](/v0.2/docs/contributing/integrations) to learn how to contribute to third-party integrations to langchain-community or to start a new partner package.
*   [Testing](/v0.2/docs/contributing/testing) guidelines to learn how to write tests for the packages.

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