reproduction: WorkflowAgent.stream: Output.object responseFormat is dropped in doStreamStep —#16996
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reproduction: WorkflowAgent.stream: Output.object responseFormat is dropped in doStreamStep —#16996lgrammel wants to merge 1 commit into
lgrammel wants to merge 1 commit into
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Bug
WorkflowAgent.stream(): Output.object responseFormat is dropped in doStreamStep — structured output never enforced
Reproduction
@ai-sdk/workflowlibrary behavior; no external provider API assumptions were required.examples/ai-functions/src/reproduction/issue-16565-workflow-response-format.ts.WorkflowAgentwithOutput.object({ schema })and a mock model that only returns valid JSON when it receivesresponseFormat.type === 'json'.WorkflowAgent.stream()sends the mock modelresponseFormat: null, causing the model to return prose and structured output parsing to fail withAI_NoObjectGeneratedError.WorkflowAgent.stream()to forward the JSON response format and return output{ ok: true }.Related Issues
Reproduces #16565