[Release] langchain-ai/langchain langchain-core==1.3.1: langchain-core==1.3.1

langchain-core version 1.3.1 is a minor release that enhances output formatting for ToolOutputMixin instances, improves tracer metadata inheritance behavior for special keys, and includes dependency updates for nbconvert and langsmith. The release focuses on improving tool integration and tracing capabilities within the LangChain core library.

Key Points

• •Allow _format_output to pass through list of ToolOutputMixin instances for better tool output handling
• •Update inheritance behavior for tracer metadata when dealing with special keys to improve observability
• •Bump langsmith dependency from 0.7.13 to 0.7.31 for enhanced tracing and monitoring features
• •Update nbconvert dependency from 7.17.0 to 7.17.1 for notebook conversion improvements
• •Maintain backward compatibility while extending tool integration capabilities
• •Improve metadata propagation in tracing systems for better debugging and monitoring

Workflow Diagram

Concepts