/**
 * Read the live scheduler PID, or null when the file is missing/unparseable or
 * the named process is dead (stale file is removed as a side-effect).
 */
export declare function readSchedulerPid(workspace?: string): number | null;
/**
 * Try to acquire the scheduler lock for the current process. Returns
 * `{ acquired: true }` after writing our PID, or `{ acquired: false, heldBy }`
 * when another live scheduler already holds it (caller should skip cron
 * registration to avoid double-firing).
 */
export declare function acquireSchedulerLock(workspace?: string): {
    acquired: boolean;
    heldBy?: number;
};
/** Remove the lock if it points at the current process. Idempotent. */
export declare function clearSchedulerPid(workspace?: string): void;