[Release] langchain-ai/langchain langchain-core==1.2.20: langchain-core==1.2.20

langchain-core version 1.2.20 release includes bug fixes, security hardening, and feature enhancements. Key improvements involve tracing invocation parameters in metadata, LangSmith integration metadata for agent creation, anti-SSRF hardening, and dependency updates. The release also includes documentation improvements and CI/CD optimizations.

Key Points

• •Trace invocation parameters are now captured in metadata for better debugging and monitoring
• •LangSmith integration metadata added to create_agent and init_chat_model functions for improved observability
• •Anti-SSRF (Server-Side Request Forgery) protections hardened to improve security posture
• •Dependency updates: orjson bumped from 3.11.5 to 3.11.6 for performance and security improvements
• •CI/CD pipeline optimized to avoid unnecessary dependency installations in lint targets
• •Documentation enhanced with base_url parameter documentation in Mermaid API
• •General housekeeping and maintenance tasks completed to improve code quality

Workflow Diagram

Concepts