/**
 * Leaper Agent – Retry Utils
 * Jittered exponential backoff for decorrelated retries.
 */
export interface RetryOptions {
    maxAttempts?: number;
    baseDelay?: number;
    maxDelay?: number;
    jitterRatio?: number;
    retryIf?: (err: unknown) => boolean;
}
export interface BackoffResult {
    delay: number;
    attempt: number;
}
export declare function jitteredBackoff(attempt: number, baseDelay?: number, maxDelay?: number, jitterRatio?: number): number;
export declare function backoffMs(attempt: number, opts?: Omit<RetryOptions, 'maxAttempts' | 'retryIf'>): number;
export declare function withRetry<T>(fn: () => Promise<T>, opts?: RetryOptions): Promise<T>;
export declare function isRateLimitError(err: unknown): boolean;
export declare function isTransientError(err: unknown): boolean;
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