[dependabot]

Bumps github.com/tmc/langchaingo from 0.1.14 to 0.1.15.

Release notes

Sourced from github.com/tmc/langchaingo's releases.

v0.1.15

A patch release that replaces three retired default models, adds typed reasoning content and OpenAI web search, and fixes a number of provider bugs.

Action required

googleai, vertex: default embedding model is now gemini-embedding-001. embedding-001 now returns 404. The new model produces 3072-dimension vectors that are not comparable with the old ones, so indexes built with the old default must be re-embedded (and fixed-size vector columns resized).

googleai, vertex: default chat model is now gemini-2.5-flash. gemini-2.0-flash is retired. Gemini 2.5 thinks by default and thinking counts toward WithMaxTokens; a very small budget can produce no output, which now returns ErrNoContentInResponse instead of panicking. Multi-turn tool calling with Gemini 3 is not yet supported (it needs thought signatures); that is planned for the next release.

anthropic: default model is now claude-sonnet-4-6. claude-3-5-sonnet-20240620 is retired. Clients that set a model are unaffected.

Unkeyed struct literals. No exported API was removed, but llms.ThinkingConfig, llms.ContentChoice, llms.CallOptions and googleai.Options gained fields, so unkeyed literals of them no longer compile. Use keyed fields. ContentChoice JSON now includes a Parts key.

Behavior changes

• bedrock (Nova): text blocks are joined into one choice instead of one choice per block.
• mistral: non-streaming tool calls stay on the choice that made them, not Choices[0].
• googleai: an error from StreamingFunc is now returned (with a nil response).
• anthropic: reasoning-only streaming works; a stream error event ends the call; temperature/top_p are omitted where the model or thinking mode rejects them.
• llms: ToolCall JSON round trips keep the function name and arguments; wrongly typed fields now return a wrapped json.UnmarshalTypeError.
• llamafile: WithN and WithMinLength no longer set n_ctx and min_p; use WithNCtx and WithMinP.
• chains: no longer clear a streaming function set by the caller.
• cohere: invalid input returns an error instead of panicking.
• googleai: GOOGLE_API_KEY is used only when no other auth option is given.

New

• llms.WithWebSearch for OpenAI (#1454).
• Typed reasoning parts: ThinkingContent, RedactedThinkingContent and ContentChoice.Parts.
• ThinkingConfig.Effort and Display (WithThinkingEffort, WithThinkingDisplay), mapped for Anthropic and OpenAI reasoning models.
• (*ContentResponse).AssistantMessage for building the next turn of a tool loop.
• anthropic: preserves thinking and multi-part messages across turns; supports claude-fable-5.
• testing/llmtest.TestModel, a conformance check for llms.Model implementations.

... (truncated)

Commits

• ec6243f Merge pull request #1536 from tmc/release/v0.1.15
• 8a1acab llms: keep the function call when unmarshaling a ToolCall
• 5ce5723 llms/googleai: re-record tests against current models
• b6404c7 llms/googleai: report reasoning support for Gemini 2.5
• 029f8e1 llms/googleai: return an error when a response is empty
• d573982 llms/googleai: make gemini-2.5-flash the default model
• 59893de llms, textsplitter: skip tokenizer tests when it cannot load
• 0f47292 llms/googleai: replay recordings without credentials
• 0335462 llms/openai: correct reasoning effort comment
• 2fe6380 llms/googleai: default to gemini-embedding-001
• Additional commits viewable in compare view

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[sonarqubecloud]

Quality Gate passed

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