reproduction: @ai-sdk/google: 429 error schema drops google.rpc.RetryInfo, so Gemini's

[ai-sdk-factory]

Bug

@ai-sdk/google: 429 error schema drops google.rpc.RetryInfo, so Gemini's retryDelay is unreachable from APICallError.data

Reproduction

• On main, packages/google/src/google-error.ts still parses only code, message, and status, so this is not caused by the reported older package versions or a partial upgrade.
• examples/ai-functions/src/reproduction/issue-18627-google-retry-info.ts observed a retryable 429 with no retry headers and RetryInfo in responseBody, while APICallError.data omitted error.details; the expected typed data included the 34.4s retry delay.
• The missing typed delay prevents custom schedulers from reading Google's recommendation without reparsing responseBody; packages/ai/src/util/retry-with-exponential-backoff.ts only considers retry headers.
• packages/google/src/__fixtures__/google-429-retry-info.json records the reported response shape, and packages/google/src/google-error.test.ts fails because the handler drops its details array.

Relevant Documentation

• https://github.com/googleapis/googleapis/blob/master/google/rpc/status.proto
• https://github.com/googleapis/googleapis/blob/master/google/rpc/error_details.proto
• https://ai.google.dev/gemini-api/docs/rate-limits
• https://ai.google.dev/gemini-api/docs/troubleshooting

Related Issues

Reproduces #18627