fix(auto-instrumentation): Use sync channel for AI SDK CJS streamText/streamObject in v4+#1768
Merged
Stephen Belanger (Qard) merged 1 commit intomainfrom Apr 9, 2026
Merged
Conversation
…/streamObject in v4+ The CJS bundle entries for streamText and streamObject used kind: "Async" for all versions (>=3.0.0), but DefaultStreamTextResult/DefaultStreamObjectResult have no .then(), so asyncEnd never fires with wrapPromise's async wrapping. Split the CJS entries to mirror the existing ESM split: - >=3.0.0 <4.0.0: kind "Async" (v3, where the function was genuinely async) - >=4.0.0: kind "Sync" + sync channel (v4+, after the sync refactor) The traceSyncStreamChannel handlers for streamTextSync/streamObjectSync already exist in ai-sdk-plugin.ts (added when ESM was fixed), so no plugin change is needed. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Luca Forstner (lforst)
approved these changes
Apr 9, 2026
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Summary
streamTextandstreamObjectusedkind: "Async"for all versions (>=3.0.0), butDefaultStreamTextResult/DefaultStreamObjectResulthave no.then(), soasyncEndnever fires when the transformer wraps viapromise.then()>=3.0.0 <4.0.0:kind: "Async"— v3, where the function was genuinely async>=4.0.0:kind: "Sync"+ sync channel — v4+, after the sync refactortraceSyncStreamChannelhandlers forstreamTextSync/streamObjectSyncalready exist inai-sdk-plugin.ts(they were added when the ESM path was fixed), so no plugin change is neededTest plan
ai-sdk-plugin.test.ts— 96 tests passtransformation.test.ts/loader-hook.test.tsconfirmed unrelated (same failures onmain)🤖 Generated with Claude Code