[Release] langchain-ai/langchain langchain-core==1.5.0: langchain-core==1.5.0

langchain-core version 1.5.0 has been released with new features and dependency updates. The major addition is support for `reasoning_effort` as a standard chat model parameter, enabling more granular control over model reasoning behavior. Dependencies have been updated including soupsieve (2.8 → 2.8.4) and mistune (3.2.1 → 3.3.0) for improved security and functionality.

Key Points

• •New `reasoning_effort` parameter added as a standard chat model parameter for controlling model reasoning behavior
• •Soupsieve dependency bumped from 2.8 to 2.8.4 for security and bug fixes
• •Mistune dependency bumped from 3.2.1 to 3.3.0 for improved markdown processing
• •Release focuses on standardizing chat model parameters across the framework
• •Maintenance updates ensure compatibility with latest dependency versions

Concepts