1867503157
- Add copy-on-write (COW) to BaseCallbackManager.copy() — defer shallow copies of handlers/tags/metadata until first mutation - Cache inspect.signature() results for BaseChatModel._generate and _agenerate to avoid repeated introspection per invoke - Cache signature(self._run) and _get_runnable_config_param in ChildTool.__init__ to avoid per-invocation introspection - Convert CONFIG_KEYS and COPIABLE_KEYS from lists to frozensets for O(1) membership checks - Fast path in _format_for_tracing when no messages have list content Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Packages
Important
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.