export interface WatchdogOptions {
    /** Health check interval in ms (default: 30000 = 30s) */
    intervalMs?: number;
    /** Health check timeout in ms (default: 10000 = 10s) */
    timeoutMs?: number;
    /** Consecutive failures before triggering onDead (default: 6) */
    maxFailures?: number;
    /** Grace period before starting checks in ms (default: 60000 = 60s) */
    startDelayMs?: number;
}
export declare function startWatchdog(healthUrl: string, onDead: () => void | Promise<void>, options?: WatchdogOptions): () => void;