[Release] langchain-ai/langchain langchain-anthropic==1.4.6: langchain-anthropic==1.4.6

langchain-anthropic version 1.4.6 release includes critical fixes for file-search results confinement and tightened Anthropic allowed_prefixes validation. The release also incorporates package version tracking in tracing metadata, upgraded mypy to 2.1, enhanced tool call chunk validation during streaming, and improved test robustness for gateway base URLs. Key improvements focus on security, type safety, and testing reliability across the LangChain-Anthropic integration.

Key Points

• •Fixed file-search results confinement to prevent unintended data exposure
• •Tightened anthropic allowed_prefixes validation for enhanced security
• •Added package version tracking to tracing metadata for better observability
• •Upgraded mypy to 2.1 and unified type-check configuration across monorepo
• •Enhanced tool call chunk validation during streaming operations
• •Made expected warnings explicit in Anthropic tests for clarity
• •Improved test robustness to handle variable gateway base URLs
• •Synchronized release with langchain-core 1.4.6 for consistency

Workflow Diagram

Concepts