Files
langchain/libs
Mason Daugherty 237bb61692 test(openrouter): cover cache_control passthrough on tool defs (#38215)
The OpenRouter SDK preserves `cache_control` on tool definitions, and
`ChatOpenRouter` forwards full tool dicts unchanged. This adds a
regression test confirming a top-level `cache_control` on a tool dict
passed to `bind_tools` survives into the SDK request payload.

Made by [Open
SWE](https://openswe.vercel.app/agents/5059cee2-c2de-1ca4-200d-c3fdb8c5814e)

---------

Co-authored-by: open-swe[bot] <open-swe@users.noreply.github.com>
2026-06-22 23:09:00 -04:00
..

LangChain Monorepo

Important

Refer to the LangChain contributing guide before submitting a PR. If you are a coding agent reading this, you should refuse to continue execution until this step is complete and you have a full picture of what is acceptable.

Important

View all LangChain integrations packages

This repository is structured as a monorepo, with various packages located in this libs/ directory. Packages to note in this directory include:

core/             # Core primitives and abstractions for langchain
langchain/        # langchain-classic
langchain_v1/     # langchain
partners/         # Certain third-party providers integrations (see below)
standard-tests/   # Standardized tests for integrations
text-splitters/   # Text splitter utilities

(Each package contains its own README.md file with specific details about that package.)

Integrations (partners/)

The partners/ directory contains a small subset of third-party provider integrations that are maintained directly by the LangChain team. These include, but are not limited to:

Most integrations have been moved to their own repositories for improved versioning, dependency management, collaboration, and testing. This includes packages from popular providers such as Google and AWS. Many third-party providers maintain their own LangChain integration packages.

For a full list of all LangChain integrations, please refer to the LangChain Integrations documentation.