export interface LockHandle {
    acquired: boolean;
    release: () => void;
}
/** Acquire an exclusive lock via `openSync(..., 'wx')` (mirrors task-store). */
export declare function acquireLock(lockPath: string): LockHandle;
/** A lock is stale if its owner PID is dead or it is older than 2× maxAgeMs. */
export declare function isLockStale(lockPath: string, maxAgeMs: number): boolean;
export declare function forceReleaseStaleLock(lockPath: string, maxAgeMs: number): void;