langchain-core

langchain-ai/langchain

Core Python package in the LangChain ecosystemready

langchain-core is the core package that provides LangChain's common abstractions and fundamental execution components, serving as the foundation for developing LLM applications and agents. Since both developers using LangChain itself and those maintaining higher-level packages and integration libraries depend on this package, its releases directly impact API compatibility and overall ecosystem stability.

langchainlangchain-corepythonllmagentsframework

Choose version

1.6.11mo ago

langchain-core langchain-core==1.6.1

Original

Key point

Fixed genai v1 streaming content indexing and StructuredTool serialization errors, added gateway information propagation on error paths

Details

Key Changes

Feature Added: Improved error handling path to propagate gateway information (propagate gateway information on error path)
Bug Fix: Strengthened indexing logic for genai v1 streaming content to improve stability
Bug Fix: Fixed StructuredTool to be JSON serializable
Dependency Update: Updated minor and patch version dependencies

Notes

The 1.6.2 release was temporarily rolled out but was ultimately reverted, keeping version 1.6.1 as the maintained version

langchain-core releases | AI Briefing