/**
 * Acquire the consolidation lock. Returns an idempotent release function.
 * Waits (polling) while another process holds it; steals a stale lock left by a
 * crashed holder. On the rare MAX_WAIT timeout it proceeds without the lock
 * rather than block a background process forever.
 */
export declare function acquireDecisionsLock(rootPath: string): Promise<() => Promise<void>>;
/** Run `fn` while holding the consolidation lock; always releases. */
export declare function withDecisionsLock<T>(rootPath: string, fn: () => Promise<T>): Promise<T>;
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