/**
 * Read pipeline_order.json — a pure array of seq numbers.
 * Returns empty array if file doesn't exist.
 */
export declare function readQueue(filePath: string): number[];
/**
 * Atomic write of pipeline_order.json.
 */
export declare function writeQueue(filePath: string, queue: number[]): void;
/**
 * Remove a seq from the queue and write back atomically.
 */
export declare function removeFromQueue(filePath: string, seq: number): void;
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