langchain-ai/langchainjs @langchain/core@1.1.25

on GitHub

Patch Changes

• #10002 27186c5 Thanks @aditya-gg04! - fix(core): support reasoning/thinking blocks in StringOutputParser

• #10077 05396f7 Thanks @christian-bromann! - feat(core): add ContextOverflowError, raise in anthropic and openai

• #10081 5a6f26b Thanks @hntrl! - feat(core): add namespace-based symbol branding for error class hierarchies

  Introduces createNamespace utility for hierarchical symbol-based branding of class hierarchies.
  All LangChain error classes now use this pattern, replacing hand-rolled duck-type isInstance checks
  with reliable cross-realm Symbol.for-based identity.

  • New LangChainError base class that all LangChain errors extend
  • New createNamespace / Namespace API in @langchain/core/utils/namespace
  • Refactored ModelAbortError, ContextOverflowError to use namespace branding
  • Added ContextOverflowError.fromError() static factory method
  • Deprecated addLangChainErrorFields in favor of LangChainError subclasses
  • Migrated Google provider errors (GoogleError, ConfigurationError, etc.) to namespace branding
  • Updated Anthropic and OpenAI providers to use ContextOverflowError.fromError()