[Release] langchain-ai/langchain langchain==1.3.5: langchain==1.3.5

LangChain v1.3.5 release includes porting AND-capable trigger conditions to SummarizationMiddleware, adding support for the apply_patch built-in tool in OpenAI integration, and fixing a minimum core dependency issue. The release also includes routine dependency updates for pyarrow and aiohttp to maintain security and compatibility. This is a minor version update with both feature additions and maintenance improvements.

Key Points

• •AND-capable trigger conditions ported to SummarizationMiddleware for more flexible conditional logic in summarization workflows
• •OpenAI integration now supports apply_patch built-in tool for enhanced API functionality
• •Fixed minimum core dependency requirement in OpenAI module to ensure proper version compatibility
• •Upgraded pyarrow from 21.0.0 to 23.0.1 for improved performance and bug fixes
• •Updated aiohttp from 3.13.4 to 3.14.0 for async HTTP handling improvements
• •Routine dependency maintenance to address security vulnerabilities and compatibility issues
• •Backward compatible minor version release suitable for production upgrades

Concepts