[Release] langchain-ai/langchain langchain-anthropic==1.4.2: langchain-anthropic==1.4.2

langchain-anthropic version 1.4.2 is released with critical fixes and new features. Key updates include restoration of `cache_control` functionality on non-direct subclasses, bumped minimum core versions for compatibility, and implementation of content-block-centric streaming (v2). The release also includes CI improvements and standardized integration test invocation across partners.

Key Points

• •Restored `cache_control` parameter support on non-direct subclasses in Anthropic integration
• •Bumped minimum core versions to ensure compatibility with latest langchain-core
• •Implemented content-block-centric streaming (v2) for improved streaming architecture
• •Removed nobenchmark flag from CI pipeline for more comprehensive testing
• •Standardized integration test invocation across partner integrations for consistency
• •Fixes critical issues from previous 1.4.1 release
• •Maintains backward compatibility while adding new streaming capabilities

Workflow Diagram

Concepts