/**
 * Extract a human-readable message from an unknown error value.
 */
export declare function errorMessage(error: unknown): string;
/**
 * Extract structured error info from an unknown error value.
 * Returns an object matching the Ably ErrorInfo shape: { message, code?, statusCode? }.
 * Suitable for embedding in JSON output as an `error` field.
 */
export declare function extractErrorInfo(error: unknown): {
    message: string;
    code?: number;
    statusCode?: number;
    href?: string;
};
export declare function getFriendlyAblyErrorHint(code?: number): string | undefined;