export interface ConcurrencyConfig {
    userSpecified?: number;
    fallback?: number;
    windowsFactor?: number;
}
export interface ConcurrencyResult {
    effectiveConcurrency: number;
    reason: string;
}
/**
 * Calculate the effective concurrency limit based on OS capabilities and user preferences.
 *
 * @param config - Configuration for concurrency calculation
 * @returns The effective concurrency limit and reason
 */
export declare function calculateEffectiveConcurrency(config?: ConcurrencyConfig): ConcurrencyResult;
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