[v6.0] fix: OpenAI-compatible chat SSE errors lose structured error fields - #17278
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…17230) ## Background OpenAI-compatible SSE errors were exposed as message strings, discarding machine-readable codes needed for programmatic error handling. ## Summary The chat stream transformer now forwards the complete parsed SSE error object instead of only its message. ## Testing Updated the existing chat stream regression test and inline snapshot to verify that the error message and code are preserved. ## End-to-end Validation - `pnpm tsx --eval <synthetic SSE fullStream validation>` — observed `{"message":"Context length exceeded","code":"CONTEXT_LENGTH_EXCEEDED"}`. - `pnpm tsx --eval <live OpenAI-compatible streamText validation>` — OpenAI returned `OK.` with finish reason `stop`. ## Related Issues Fixes #13506 Co-authored-by: StellaCheong59 <178243329+StellaCheong59@users.noreply.github.com>
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Background
OpenAI-compatible SSE errors were exposed as message strings, discarding machine-readable codes needed for programmatic error handling.
Summary
The chat stream transformer now forwards the complete parsed SSE error object instead of only its message.
Testing
Updated the existing chat stream regression test and inline snapshot to verify that the error message and code are preserved.
End-to-end Validation
pnpm tsx --eval <synthetic SSE fullStream validation>— observed{"message":"Context length exceeded","code":"CONTEXT_LENGTH_EXCEEDED"}.pnpm tsx --eval <live OpenAI-compatible streamText validation>— OpenAI returnedOK.with finish reasonstop.Related Issues
Fixes #13506
Backport of #17230
Co-authored-by: StellaCheong59 178243329+StellaCheong59@users.noreply.github.com