/**
 * Kept below the daemon retirement wait. A normal graceful shutdown should
 * finish first; if Bun leaves node:http's close callback pending after a
 * WebSocket upgrade, the daemon must still release its process promptly.
 */
export declare const HUB_DAEMON_SHUTDOWN_DEADLINE_MS = 2000;
export interface HubDaemonShutdownWatchdogOptions {
    deadlineMs: number;
    exitCode: number;
    onTimeout?: () => void;
    exit?: (code: number) => void;
}
export declare function armHubDaemonShutdownWatchdog(options: HubDaemonShutdownWatchdogOptions): void;