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fix(codebuddy-cn): strip empty tool_calls arrays to preserve reasoning

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CodeBuddy CN includes "tool_calls": [] in every SSE streaming delta.
@ai-sdk/openai-compatible checks delta.tool_calls != null — an empty
array passes ([] != null is true in JS), triggering premature
reasoning-end on every reasoning chunk (0/1ms durations in OpenCode).

Strip empty tool_calls arrays in passthrough before hasValuableContent.
Zero side-effect: real tool_calls always have at least one element.

Closes #2176

Co-authored-by: Cursor <cursoragent@cursor.com>
This commit is contained in:
zmf
2026-07-01 09:35:13 +07:00
committed by decolua
parent 8f81f17b99
commit 602ee4054b
1 changed files with 14 additions and 0 deletions
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14
open-sse/utils/stream.js
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@@ -130,6 +130,20 @@ export function createSSEStream(options = {}) {
}
}
// Strip empty tool_calls arrays that break AI SDK reasoning tracking.
// Some providers (e.g. CodeBuddy CN) include `"tool_calls": []` in
// every streaming delta. @ai-sdk/openai-compatible checks
// `delta.tool_calls != null` — an empty array passes this check,
// causing premature `reasoning-end` on every chunk.
if (parsed?.choices) {
for (const choice of parsed.choices) {
if (choice.delta?.tool_calls && Array.isArray(choice.delta.tool_calls) && choice.delta.tool_calls.length === 0) {
delete choice.delta.tool_calls;
fieldsInjected = true;
}
}
}
if (!hasValuableContent(parsed, FORMATS.OPENAI)) {
continue;
}