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fix(ai): skip errored/aborted assistant messages in transform-messages

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Fixes OpenAI Responses 400 error 'reasoning without following item' by
skipping errored/aborted assistant messages entirely rather than filtering
at the provider level. This covers openai-responses, openai-codex-responses,
and future providers.

Removes strictResponsesPairing compat option (no longer needed).

Closes #838
This commit is contained in:
Mario Zechner
2026-01-19 15:55:18 +01:00
parent abb1775ff7
commit 2d27a2c728
10 changed files with 109 additions and 52 deletions
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23
packages/ai/src/providers/openai-responses.ts
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@@ -478,22 +478,9 @@ function convertMessages(model: Model<"openai-responses">, context: Context): Re
}
} else if (msg.role === "assistant") {
const output: ResponseInput = [];
const strictResponsesPairing = model.compat?.strictResponsesPairing ?? false;
let isIncomplete = false;
let shouldReplayReasoning = msg.stopReason !== "error";
let allowToolCalls = msg.stopReason !== "error";
if (strictResponsesPairing) {
isIncomplete = msg.stopReason === "error" || msg.stopReason === "aborted";
const hasPairedContent = msg.content.some(
(b) => b.type === "toolCall" || (b.type === "text" && (b as TextContent).text.trim().length > 0),
);
shouldReplayReasoning = !isIncomplete && hasPairedContent;
allowToolCalls = !isIncomplete;
}
for (const block of msg.content) {
// Do not submit thinking blocks if the completion had an error (i.e. abort)
if (block.type === "thinking" && shouldReplayReasoning) {
if (block.type === "thinking") {
if (block.thinkingSignature) {
const reasoningItem = JSON.parse(block.thinkingSignature);
output.push(reasoningItem);
@@ -504,11 +491,6 @@ function convertMessages(model: Model<"openai-responses">, context: Context): Re
let msgId = textBlock.textSignature;
if (!msgId) {
msgId = `msg_${msgIndex}`;
}
// For incomplete turns, never replay the original message id (if any).
// Generate a stable synthetic id so strict pairing providers do not expect a paired reasoning item.
if (strictResponsesPairing && isIncomplete) {
msgId = `msg_${msgIndex}_${shortHash(textBlock.text)}`;
} else if (msgId.length > 64) {
msgId = `msg_${shortHash(msgId)}`;
}
@@ -519,8 +501,7 @@ function convertMessages(model: Model<"openai-responses">, context: Context): Re
status: "completed",
id: msgId,
} satisfies ResponseOutputMessage);
// Do not submit toolcall blocks if the completion had an error (i.e. abort)
} else if (block.type === "toolCall" && allowToolCalls) {
} else if (block.type === "toolCall") {
const toolCall = block as ToolCall;
output.push({
type: "function_call",