/**
 * Formats one unknown error-like value into readable text for logs and feedback.
 *
 * An `AuthenticationError` is reported without its stack, because its message is written for the user - it
 * says which harness has to be signed in again and how - and the frames of a failure nobody can debug would
 * only push those instructions out of sight.
 */
export declare function formatUnknownErrorDetails(error: unknown): string;