feat(ai): add onStepFinish callback to createUIMessageStream#12448
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aayush-kapoor merged 5 commits intomainfrom Feb 11, 2026
Merged
feat(ai): add onStepFinish callback to createUIMessageStream#12448aayush-kapoor merged 5 commits intomainfrom
aayush-kapoor merged 5 commits intomainfrom
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packages/ai/src/ui-message-stream/handle-ui-message-stream-finish.test.ts
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felixarntz
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Feb 11, 2026
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felixarntz
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lgtm, one question/suggestion
packages/ai/src/ui-message-stream/ui-message-stream-on-step-finish-callback.ts
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This was referenced Feb 25, 2026
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Background
we expose
onFinishcallback for createUIMessageStream() but notonStepFInish, which is inconsistent with the pattern.also reported in #12383
Summary
added the callback to the function + new type added
Manual Verification
localhost:3000/use-chat-human-in-the-loopChecklist
pnpm changesetin the project root)Future Work
the callback might need to be added for
createAgentUIStreamResponseRelated Issues
fixes #12383