import { AuthupError } from '../module.ts';
import type { AuthupErrorOptions } from '../types.ts';
export declare const VALIDATION_ERROR_INSTANCE: unique symbol;
/**
 * A domain/business-rule violation raised by core logic. Deliberately NOT
 * named after an HTTP status: core code stays transport-agnostic, and the HTTP
 * adapter maps its `ErrorCode.BAD_REQUEST` to a 400 response
 * (`httpStatusFromCode`). Prefer this over `BadRequestError` in `core/**`.
 */
export declare class ValidationError extends AuthupError {
    constructor(input?: string | AuthupErrorOptions);
}
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