/**
 * OperationalError class for representing errors that are expected during normal operation
 * Similar to Bluebird's OperationalError
 */
export declare class OperationalError extends Error {
    isOperational: boolean;
    constructor(message: string);
}
/**
 * Check if an error is an operational error
 * @param error - Error to check
 * @returns True if the error is operational
 */
export declare function isOperationalError(error: unknown): boolean;
/**
 * Check if an error is a programmer error (unexpected, likely a bug)
 * @param error - Error to check
 * @returns True if the error is a programmer error
 */
export declare function isProgrammerError(error: unknown): boolean;