];

}

function replayValidationTools() {

return createNoopTools();

}

function disableResponsesReplayToolChoice(payload: unknown, model: Model<Api>): unknown {

if (!isOpenAIResponsesFamily(model.api) || !payload || typeof payload !== "object") {

return undefined;

}

const next = payload as { tool_choice?: unknown };

// Replay probes include historical tool calls to validate transcript repair,

// but they should not force a fresh noop tool call during the live request.

next.tool_choice = "none";

return next;

function replayValidationTools(model: Model<Api>) {

// Responses-family providers may force or reject fresh tool-choice policy

// when tools are present. These probes validate repaired historical transcript

// shape, not new tool invocation.

return isOpenAIResponsesFamily(model.api) ? undefined : createNoopTools();

}

function buildReplayMessages(model: Model<Api>): AgentMessage[] {

{

systemPrompt: "You are a concise assistant. Follow the user's instruction exactly.",

messages: sanitized as never,

tools: replayValidationTools(),

tools: replayValidationTools(model),

},

{

apiKey: requireApiKey(apiKeyInfo, model.provider),

reasoning: "low",

maxTokens: 96,

onPayload: disableResponsesReplayToolChoice,

},

120_000,

);

{

systemPrompt: "You are a concise assistant. Follow the user's instruction exactly.",

messages: transformed as never,

tools: replayValidationTools(),

tools: replayValidationTools(model),

},

{

apiKey: requireApiKey(apiKeyInfo, model.provider),

reasoning: "low",

maxTokens: 96,

onPayload: disableResponsesReplayToolChoice,

},

120_000,

);