fix(anthropic): throw error in doStream when the first stream chunk is an error#10653
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fix(anthropic): throw error in doStream when the first stream chunk is an error#10653
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lgrammel
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Background
The Anthropic API sends a 200 responses for streaming requests when overloaded, and includes error chunks in the stream. This breaks the AI SDK retry mechanism which relies on HTTP status codes and errors. While this cannot be solved in general, because the expected state is unclear when such an error happens mid-stream, it can be solved when the first chunk is the error chunk (which may be the majority of cases).
Summary
DelayedPromiseinto provider utilsdoStreamif first chunk is an errorManual Verification
Cannot verify overload error end to end (Anthropic API would need to be overloaded).
examples/ai-core/src/stream-text/anthropic.tsto ensure streaming still worksFuture Work
Related Issues
Fixes #2453