const { client, startSince } = await primeMatrixQaDriverScenarioClient(context);

const childToken = buildMatrixQaToken("MATRIX_QA_SUBAGENT_CHILD");

const triggerBody = [

`${context.sutUserId} Call sessions_spawn now for this QA check.`,

`Use task="Finish with exactly ${childToken}."`,

"Use label=matrix-thread-subagent thread=true mode=session runTimeoutSeconds=120.",

"Do not send the child token from this parent session.",

`${context.sutUserId} For this QA check, call the sessions_spawn tool now.`,

`Use exactly these arguments: task="Finish with exactly ${childToken}.", label="matrix-thread-subagent", thread=true, mode="session", runTimeoutSeconds=120.`,

"Do not omit thread=true; the child must bind to this Matrix thread.",

"Do not write the child token in the parent response.",

].join(" ");

const driverEventId = await client.sendTextMessage({

body: triggerBody,

expect(artifacts.threadRootEventId).toBe("$subagent-thread-root");

expectSentTextMessage(sendTextMessage, {

bodyIncludes: ["Call sessions_spawn now for this QA check", "runTimeoutSeconds=120"],

bodyIncludes: ["call the sessions_spawn tool now", "thread=true", "runTimeoutSeconds=120"],

mentionUserIds: ["@sut:matrix-qa.test"],

roomId: "!main:matrix-qa.test",

});