});

}

function spawnInput(index: number): SpawnInput {

const call = supervisorSpawnMock.mock.calls[index] as [SpawnInput] | undefined;

if (!call) {

throw new Error(`expected supervisor spawn call ${index}`);

}

return call[0];

}

test("exec falls back when PTY spawn fails", async () => {

supervisorSpawnMock

.mockRejectedValueOnce(new Error("pty spawn failed"))

expect(outcome.status).toBe("completed");

expect(outcome.aggregated).toContain("ok");

expect(warnings.join("\n")).toContain("PTY spawn failed");

const firstSpawnInput = supervisorSpawnMock.mock.calls.at(0)?.[0] as SpawnInput | undefined;

const secondSpawnInput = supervisorSpawnMock.mock.calls.at(1)?.[0] as SpawnInput | undefined;

expect(firstSpawnInput?.mode).toBe("pty");

expect(secondSpawnInput?.mode).toBe("child");

expect(spawnInput(0).mode).toBe("pty");

expect(spawnInput(1).mode).toBe("child");

});

test("exec cleans session state when PTY fallback spawn also fails", async () => {