[Release] langchain-ai/langchain langchain-core==1.2.14: langchain-core==1.2.14

langchain-core version 1.2.14 was released with bug fixes for merge_lists with parallel tool calls, temperature parameter handling in LangSmith tracing, recursion errors in args_schema, and index/timestamp preservation during merging. The release also includes documentation updates for security best practices, removal of langserve from sys info utilities, and dependency bumps.

Key Points

• •Fixed merge_lists function that was incorrectly merging parallel tool calls, improving tool execution reliability
• •Added support for integer temperature values in _get_ls_params for proper LangSmith tracing integration
• •Prevented recursion errors when args_schema is defined as a dictionary type
• •Preserved index and timestamp fields during data merging operations to maintain data integrity
• •Removed langserve from system info utility and added deepagents support for updated dependency tracking
• •Added security warnings and best practices documentation for deserialization to prevent vulnerabilities
• •Fixed docstring inaccuracies and updated outdated LangSmith URLs in documentation
• •Corrected misleading Jinja2 sandboxing comment for accurate security understanding
• •Updated langchain-deps group with 8 dependency updates across 3 directories for improved compatibility

Concepts