export declare class UserError extends Error {
    constructor(message: string, options?: ErrorOptions);
}
/**
 * Detects user errors by name as well as identity, so an instance created in
 * another bundle (for example `@poe-code/user-error`, thrown by packages that do
 * not depend on toolcraft) is still rendered as guidance where `instanceof`
 * would fail - while a genuine `UserError` stays one even if its name was
 * overwritten.
 */
export declare function isUserError(error: unknown): error is Error;
export declare class ToolcraftBugError extends Error {
    constructor(message: string);
}