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fix(ai): remove itemId from providerOptions for openai models #886

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fix(ai): remove itemId from providerOptions for openai models #886

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40 changes: 39 additions & 1 deletion packages/ai/src/agent/stream-text-iterator.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -102,6 +102,7 @@ export async function* streamTextIterator({
let currentToolChoice = toolChoice;
let currentContext = experimental_context;
let currentActiveTools: string[] | undefined;
let previousResponseId: string | undefined; // Track OpenAI response ID (for openai responses api)

const steps: StepResult<any>[] = [];
let done = false;
Expand Down Expand Up @@ -255,6 +256,15 @@ export async function* streamTextIterator({
? filterToolSet(tools, currentActiveTools)
: tools;

// Set previousResponseId in providerOptions for OpenAI conversation continuity
if (
previousResponseId &&
currentGenerationSettings?.providerOptions?.openai
) {
currentGenerationSettings.providerOptions.openai.previousResponseId =
previousResponseId;
}

const {
toolCalls,
finish,
Expand All @@ -277,6 +287,15 @@ export async function* streamTextIterator({
collectUIChunks,
}
);

// Extract response ID from finish chunk for next iteration
// OpenAI provides this in providerMetadata.openai.responseId
const openaiResponseId = (finish as any)?.providerMetadata?.openai
?.responseId;
if (openaiResponseId && typeof openaiResponseId === 'string') {
previousResponseId = openaiResponseId;
}

isFirstIteration = false;
stepNumber++;
steps.push(step);
Expand Down Expand Up @@ -309,7 +328,26 @@ export async function* streamTextIterator({
toolName: toolCall.toolName,
input: JSON.parse(toolCall.input),
...(toolCall.providerMetadata != null
? { providerOptions: toolCall.providerMetadata }
? {
providerOptions: (() => {
if (
toolCall.providerMetadata.openai &&
typeof toolCall.providerMetadata.openai === 'object'
) {
const { itemId: _itemId, ...rest } =
toolCall.providerMetadata.openai;
// Remove itemId here — it requires a paired reasoningId.
// Passing previousResponseId is sufficient. (we already pass this above)
// Passing previousResponseId + itemId throws a duplicate item error

return {
...toolCall.providerMetadata,
openai: rest,
};
}
return toolCall.providerMetadata;
})(),
}
: {}),
})),
});
Expand Down