fix(deploy): handle reasoning-only stream chunks - #9881
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August 11, 2026 01:57
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What changed
delta.contentas an empty string when accumulating the deploy response log.content=Noneand non-emptyreasoning_content.Why
Reasoning parsers can emit chunks that contain only
reasoning_content.DeltaMessage.contentis optional for these chunks, butSwiftDeploy._post_process()previously attemptedstr += None, raisingTypeErrorand terminating the stream.The streamed response is otherwise unchanged, so clients continue receiving the reasoning content while the deploy log only accumulates answer content.
Experiment results
python -m pytest tests/deploy/test_deploy.py -q— 1 passedflake8 swift/pipelines/infer/deploy.py tests/deploy/test_deploy.pyyapf --diff swift/pipelines/infer/deploy.py tests/deploy/test_deploy.pyisort --check-only swift/pipelines/infer/deploy.py tests/deploy/test_deploy.py