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LangChain/LangChain.js

LangChain.js

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Releases121Avg37/moVersionslangchain@1.2.29 → @langchain/google-gauth@2.1.27
Mar 17, 2026

Patch Changes

  • Updated dependencies [af9bbd3]:
    • @langchain/openai@1.3.0

Patch Changes

  • Updated dependencies []:
    • @langchain/google-gauth@2.1.26

Patch Changes

Minor Changes

  • #10317 af9bbd3 Thanks @hntrl! - feat(openai): support tool search and defer_loading
    • Add tools.toolSearch() factory for the OpenAI Responses API tool_search built-in tool, supporting both server-executed and client-executed modes.
    • Propagate defer_loading from LangChain tool extras through bindTools() and into the Responses API payload, enabling on-demand tool discovery.
    • Handle tool_search_call and tool_search_output response items in both streaming and non-streaming converters.
    • Add core block translator support to convert tool_search_callserver_tool_call and tool_search_outputserver_tool_call_result.

Patch Changes

Patch Changes

  • Updated dependencies [af9bbd3]:
    • @langchain/openai@1.3.0

Patch Changes

  • Updated dependencies []:
    • @langchain/google-webauth@2.1.26

Patch Changes

  • Updated dependencies [561224b, 6a2da5b]:
    • @langchain/google-common@2.1.26

Patch Changes

  • #10420 08657f2 Thanks @pawel-twardziak! - Fix temperature/topK/topP handling: guard all three so undefined values are not set on the request object, and fix broken topK/topP validation when thinking is enabled.
  • Updated dependencies [6db417b, d69dfcc]:
    • @langchain/core@1.1.33

Patch Changes

Patch Changes

Patch Changes

Patch Changes

  • Updated dependencies [af9bbd3]:
    • @langchain/openai@1.3.0

Patch Changes

Patch Changes

  • Updated dependencies [af9bbd3]:
    • @langchain/openai@1.3.0

Patch Changes

Patch Changes

  • #9862 5b250b1 Thanks @stellarrover! - fix(langchain/agents): Fix ReactAgent routing with returnDirect + beforeModel middleware

    This fixes a routing error when an agent has both tools with returnDirect: true and middleware with beforeModel hooks (e.g., summarizationMiddleware). Before this fix, non-returnDirect tools would fail with "Branch condition returned unknown or null destination".

  • Updated dependencies [6db417b, d69dfcc]:

    • @langchain/core@1.1.33
Mar 12, 2026

Patch Changes

Patch Changes

  • #10288 93e6180 Thanks @hntrl! - feat(aws): Add bedrockApiKey, bedrockApiSecret, and bedrockApiSessionToken to ChatBedrockConverse
    • New constructor fields allow passing AWS credentials directly instead of relying solely on the default credential provider chain
    • Falls back to BEDROCK_AWS_ACCESS_KEY_ID, BEDROCK_AWS_SECRET_ACCESS_KEY, and BEDROCK_AWS_SESSION_TOKEN environment variables
    • Explicit credentials field still takes highest priority
Mar 11, 2026

Patch Changes

Patch Changes

  • Updated dependencies []:
    • @langchain/google-common@2.1.25
Latest
@langchain/google-gauth@2.1.27
Tracking Since
Mar 3, 2026
Last fetched Apr 19, 2026