fix(ai): pass providerMetadata in smooth stream #11688
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aayush-kapoor
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| if (chunk.providerMetadata != null) { | ||
| providerMetadata = chunk.providerMetadata; | ||
| } | ||
|
|
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providerMetadata is lost when buffered text is fully consumed by the while loop and a metadata-carrying empty delta arrives afterwards
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lgrammel
reviewed
Jan 10, 2026
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| if (chunk.providerMetadata != null) { | ||
| providerMetadata = chunk.providerMetadata; | ||
| } |
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do we need some merge algorithm here?
lgrammel
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Jan 10, 2026
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Background
when using anthropic's extended thinking with tool calls, we drop the thinking blocks from previous turns.
#11602
based on the reproduction provided, the issue turned out to be in smoothStream, where smoothStream was stripping providerMetadata from reasoning-delta chunks. this signature is required when sending thinking blocks back to the API in subsequent turns
Summary
pass
providerMetadatathrough smoothStreamManual Verification
the reproduction code given here was run before and after the fix, and was resolved
Checklist
pnpm changesetin the project root)Related Issues
Fixes #11602