/**
 * Helper function to limit concurrency (Worker Pool pattern)
 *
 * Executes a list of tasks with a maximum concurrency limit.
 * Useful for AI generation tasks to avoid rate limits or system overload.
 */
export declare function pMap<T, R>(items: T[], mapper: (item: T) => Promise<R>, concurrency: number, onProgress?: (completed: number, total: number) => void): Promise<R[]>;
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