langchain-ai/langchainjs @langchain/openrouter@0.3.0

on GitHub

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