export type ErrorClassification = "retryable" | "rate_limited" | "failover_only" | "fatal";
export interface RetryOptions {
    maxRetries: number;
    delayFactor: number;
    onRetry?: (attempt: number, error: Error, delay: number) => void;
}
export declare function classifyError(error: unknown): ErrorClassification;
export declare function calculateDelay(attempt: number, maxRetries: number, delayFactor: number): number;
export declare function withRetry<T>(fn: () => Promise<T>, options?: Partial<RetryOptions>): Promise<T>;
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