export type Lock = {
    release: () => void;
};
/**
 * Acquire the state lock for `root`. Throws if another live run holds it (unless
 * `force`). Releases automatically on process exit; the returned `release` lets
 * callers free it early. Stale locks (dead holder) are stolen.
 */
export declare function acquireLock(root: string, command: string, force?: boolean): Lock;
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