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Fixes TanStack#216 Gemini 3.0 models require thought signatures to be preserved and sent back during function calling. When the model returns a functionCall with a thoughtSignature, it must be included in subsequent API requests or the API returns a 400 validation error. Changes: - Add optional `metadata` field to `ToolCall` type for provider-specific data - Update `ToolCallStreamChunk` to use the `ToolCall` interface - Capture thoughtSignature from Gemini responses in stream processing - Include thoughtSignature when formatting messages back to Gemini API This fix ensures compatibility with Gemini 3.0 Flash and other Gemini 3 models that enforce thought signature validation for tool calls.
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Fixes TanStack#216
Gemini 3.0 models require thought signatures to be preserved and sent
back during function calling. When the model returns a functionCall
with a thoughtSignature, it must be included in subsequent API requests
or the API returns a 400 validation error.
Changes:
metadatafield toToolCalltype for provider-specific dataToolCallStreamChunkto use theToolCallinterfaceThis fix ensures compatibility with Gemini 3.0 Flash and other Gemini 3
models that enforce thought signature validation for tool calls.