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reproduction: BUG: openai-compatible: empty toolcalls: array in every delta - #20251
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Co-authored-by: Gregor Martynus <[email protected]>
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…e reasoning streams (vercel#20253) ## Background OpenAI-compatible gateways that attach `tool_calls: []` to reasoning deltas caused one logical reasoning span to be emitted as multiple user-visible reasoning blocks. ## Root Cause The stream transform treated any non-null `tool_calls` array as active tool output. The immutable reproduction and regression test confirmed that empty arrays closed reasoning after each delta, producing two start/end cycles instead of one. ## Summary Reasoning now ends for tool calls only when the streamed `tool_calls` array contains entries. Added a patch changeset and removed reproduction-only artifacts. ## Testing Added a regression test verifying consecutive reasoning deltas with empty tool-call arrays remain within one reasoning lifecycle. ## End-to-end Validation - `pnpm -C packages/openai-compatible build` completed successfully. - Immutable reproduction replay completed successfully with one contiguous reasoning block and no original failure signal. ## Related Issues Fixes vercel#20203 Closes vercel#20251 --------- Co-authored-by: ai-sdk-factory <[email protected]> Co-authored-by: Gregor Martynus <[email protected]> Co-authored-by: WuJunkai2004 <[email protected]>
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…e reasoning streams (#20537) ## Background OpenAI-compatible gateways that attach `tool_calls: []` to reasoning deltas caused one logical reasoning span to be emitted as multiple user-visible reasoning blocks. ## Root Cause The stream transform treated any non-null `tool_calls` array as active tool output. The immutable reproduction and regression test confirmed that empty arrays closed reasoning after each delta, producing two start/end cycles instead of one. ## Summary Reasoning now ends for tool calls only when the streamed `tool_calls` array contains entries. Added a patch changeset and removed reproduction-only artifacts. ## Testing Added a regression test verifying consecutive reasoning deltas with empty tool-call arrays remain within one reasoning lifecycle. ## End-to-end Validation - `pnpm -C packages/openai-compatible build` completed successfully. - Immutable reproduction replay completed successfully with one contiguous reasoning block and no original failure signal. ## Related Issues Fixes #20203 Closes #20251 Co-authored-by: ai-sdk-factory[bot] <305873210+ai-sdk-factory[bot]@users.noreply.github.com> Co-authored-by: ai-sdk-factory <[email protected]> Co-authored-by: WuJunkai2004 <[email protected]>
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Bug
[BUG]: openai-compatible: empty
tool_calls: []array in every delta fragments reasoning into one reasoning-start/end cycle per chunkReproduction
packages/openai-compatible/package.jsonis version 3.0.43, and the reported APIs and response fields exist onmain; no package-version or configuration mismatch explains the behavior.packages/openai-compatible/src/chat/openai-compatible-chat-language-model.tscloses active reasoning wheneverdelta.tool_calls != null, so an empty array incorrectly triggers a reasoning lifecycle transition.examples/ai-functions/src/reproduction/openai-compatible-empty-tool-calls-reasoning.tsreplayed two consecutive reasoning deltas containingtool_calls: []and observed tworeasoning-start/endcycles instead of the expected single contiguous reasoning block.packages/openai-compatible/src/chat/__fixtures__/issue-20203-empty-tool-calls.chunks.txtrecords the reported stream shape, and the regression test added topackages/openai-compatible/src/chat/openai-compatible-chat-language-model.test.tsfails because two reasoning starts are emitted instead of one.Relevant Documentation
Related Issues
Reproduces #20203