langchain-ai/langchainjs @langchain/core@1.3.7

on GitHub

Patch Changes

• #12120 a4fb396 Thanks @thushanth-bengre-langchain! - feat(core): add a standard refusal content block and ModelRefusalError

  Model refusals from OpenAI, Anthropic, and Gemini now appear as a refusal content block in message.contentBlocks. JSON, tool-call, and structured output parsers throw ModelRefusalError (from @langchain/core/errors) when the model refuses, instead of a generic parsing error.