[Release] langchain-ai/langchain langchain==1.2.13: langchain==1.2.13

LangChain v1.2.13 release includes LangSmith integration metadata enhancements for agent creation and chat model initialization, security updates for dependencies (PyJWT, pyasn1), bug fixes for OpenAI Responses API and Runtime exports, and general maintenance improvements including linting and CI optimizations.

Key Points

• •LangSmith integration metadata added to create_agent and init_chat_model functions for improved observability
• •Security dependency updates: PyJWT upgraded from 2.10.1 to 2.12.0 and pyasn1 from 0.6.2 to 0.6.3
• •Fixed OpenAI Responses API input items by adding type: message field
• •Runtime class now properly exported from agents.middleware module
• •Baseten added to _BUILTIN_PROVIDERS for expanded provider support
• •CI/CD improvements: suppressed pytest streaming output and optimized dependency installation in lint targets
• •Code quality updates: Black formatter upgraded from 25.11.0 to 26.3.1
• •Dependency maintenance: orjson bumped from 3.11.5 to 3.11.6 and lock files updated

Workflow Diagram

Concepts