Type Alias SDKSessionStateChangedMessage

Mirrors notifySessionStateChanged. 'idle' fires after heldBackResult flushes and the bg-agent do-while exits — authoritative turn-over signal.

type SDKSessionStateChangedMessage = {
    session_id: string;
    state: "idle" | "running" | "requires_action";
    subtype: "session_state_changed";
    type: "system";
    uuid: UUID;
}