langchain@1.4.2

Patch Changes

• #10900 6bbddca Thanks @christian-bromann! - fix(langchain): unwrap tool message outputs in agent streams

• #10706 4ecb660 Thanks @JadenKim-dev! - fix(langchain): set name on todoListMiddleware ToolMessages

@langchain/xai@1.3.19

Patch Changes

• Updated dependencies [3999fab, fce9ab4]:
  • @langchain/openai@1.4.7

@langchain/together-ai@0.1.5

Patch Changes

• Updated dependencies [3999fab, fce9ab4]:
  • @langchain/openai@1.4.7

@langchain/openrouter@0.3.0

Minor Changes

• #10666 2bb55b0 Thanks @hnustwjj! - feat(openrouter): surface reasoning content as v1 standard content blocks

  convertOpenRouterResponseToBaseMessage and
  convertOpenRouterDeltaToBaseMessageChunk now copy OpenRouter's
  reasoning (flat string) and reasoning_details (structured array) fields
  onto additional_kwargs.reasoning_content / additional_kwargs.reasoning_details.
  A new ChatOpenRouterTranslator is registered in @langchain/core under
  the "openrouter" provider key so AIMessage.contentBlocks emits standard
  {type: "reasoning"} blocks alongside text and tool calls.

  Previously, reasoning text returned by reasoning-capable models routed
  through OpenRouter (DeepSeek R1, Minimax M2, Claude extended thinking,
  o-series, etc.) was silently dropped: only the reasoning_tokens count
  was preserved via usage_metadata. Consumers using standard content blocks
  (including the frontend agent UI patterns shown in the docs) could not
  display the model's chain of thought.

Patch Changes

• #10832 1b24369 Thanks @info-arnav! - fix(core, openrouter): make CJS default re-exports callable

• Updated dependencies [3999fab, fce9ab4]:

  • @langchain/openai@1.4.7

@langchain/openai@1.4.7

Patch Changes

• #10918 3999fab Thanks @christian-bromann! - fix(openai): stream custom tool calls through Responses API chunks

• #10791 fce9ab4 Thanks @Genmin! - fix(openai): preserve top-level Responses API ids on AI messages

@langchain/neo4j@0.1.6

Patch Changes

• Updated dependencies []:
  • @langchain/classic@1.0.34

@langchain/mistralai@1.1.0

Minor Changes

• #10873 a74d574 Thanks @baptistejamin! - chore(mistralai): upgrade to @mistralai/mistralai v2

  Also populates response_metadata.model on chat completions (was missing before).

@langchain/ibm@0.1.1

Patch Changes

• #10721 20f27df Thanks @peterzaccha! - fix(langchain-ibm): handle API errors in streaming responses

@langchain/fireworks@0.1.5

Patch Changes

• Updated dependencies [3999fab, fce9ab4]:
  • @langchain/openai@1.4.7

@langchain/deepseek@1.0.27

Patch Changes

• #10747 78e642f Thanks @neo1027144-creator! - feat(deepseek): add DeepSeek V4 Flash and V4 Pro model profiles

• Updated dependencies [3999fab, fce9ab4]:

  • @langchain/openai@1.4.7