/**
 * Port Management Utilities
 *
 * Functions for checking port availability, cleanup, and HTTP shutdown.
 */
declare function canBind(port: number): Promise<boolean>;
declare function attemptHttpShutdown(port: number): Promise<boolean>;
declare function killPidBestEffort(pid: number, opts: {
    force: boolean;
}): void;
/**
 * Ensure a TCP port is available by attempting graceful shutdown of any process holding it,
 * then force-killing as a last resort.
 */
declare function ensurePortAvailable(port: number, opts?: {
    attemptGraceful?: boolean;
    restartInPlaceOnly?: boolean;
}): Promise<'available' | 'handled_existing_server'>;
export { ensurePortAvailable, killPidBestEffort, canBind, attemptHttpShutdown };