test: google vertex thoughtsignature #11378
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…rieval When using @ai-sdk/google-vertex with Gemini thinking models (e.g. gemini-3-pro), multi-step tool calls fail with "function call is missing a thought_signature" error. Root cause: thoughtSignature is stored under providerOptions.vertex but retrieved using hardcoded providerOptions.google in convertToGoogleGenerativeAIMessages. This fix: - Adds providerOptionsName parameter to convertToGoogleGenerativeAIMessages - Uses dynamic key access instead of hardcoded "google" - Passes providerOptionsName from getArgs() to the conversion function Fixes #11181 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
…into fix/vertex-thought-signature-retrieval
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