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fix(ai): handle unknown finish_reason in openai-completions gracefully

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Map unknown finish_reason values (e.g. "end" from Ollama/LM Studio) to
"stop" instead of throwing, since assistant content is already produced.

fixes #2142
This commit is contained in:
Mario Zechner
2026-03-14 03:59:55 +01:00
parent 9c0ba357ad
commit a79ca41190
2 changed files with 7 additions and 2 deletions
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5
packages/ai/src/providers/openai-completions.ts
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@@ -730,10 +730,11 @@ function parseChunkUsage(
return usage;
}
function mapStopReason(reason: ChatCompletionChunk.Choice["finish_reason"]): StopReason {
function mapStopReason(reason: ChatCompletionChunk.Choice["finish_reason"] | string): StopReason {
if (reason === null) return "stop";
switch (reason) {
case "stop":
case "end":
return "stop";
case "length":
return "length";
@@ -743,7 +744,7 @@ function mapStopReason(reason: ChatCompletionChunk.Choice["finish_reason"]): Sto
case "content_filter":
return "error";
default: {
const _exhaustive: never = reason;
const _exhaustive: never = reason as never;
throw new Error(`Unhandled stop reason: ${_exhaustive}`);
}
}