/**
 * Validation issue helpers and known prop enum checks.
 */
import type { ValidationIssue } from './types';
export declare function issue(path: string, message: string, code?: string, expected?: string[]): ValidationIssue;
export declare function toErrorLines(issues: ValidationIssue[]): string[];
export declare function validatePropEnums(type: string, props: Record<string, unknown>, path: string, issues: ValidationIssue[]): void;