[Release] langchain-ai/langchain langchain==1.3.7: langchain==1.3.7

LangChain v1.3.7 release includes style improvements with ruff ARG rules, a new ProviderToolSearchMiddleware feature for enhanced tool searching capabilities, mypy type checking enhancements with warn_return_any activation, and legacy code cleanup marking components for v2.0 removal. This incremental release focuses on code quality, type safety, and middleware functionality improvements.

Key Points

• •New ProviderToolSearchMiddleware feature added for improved tool search and discovery capabilities
• •Ruff linting rules (ARG) implemented to enforce consistent argument naming conventions across codebase
• •MyPy type checker enhanced with warn_return_any flag activated for stricter return type validation
• •Legacy trigger view components marked for removal in v2.0 to guide migration planning
• •Incremental patch release (1.3.6 → 1.3.7) focusing on code quality and maintainability
• •Type safety improvements reduce runtime errors and improve IDE autocomplete support
• •Code style standardization through automated linting rules ensures consistency across contributions

Workflow Diagram

Concepts