import { V as ValidationResult, d as FrontmatterMetadata } from '../LLMail-BxCNsAGO.js';
import '../utils/logger.js';
import 'winston';
import '../errors/errors.js';

/**
 * Validates the format and structure of metadata, not business rules.
 * Only checks that required fields exist and are of the correct type.
 */
declare class MetadataFormatValidator {
    /**
     * Validates that required fields exist and are of the correct type
     */
    validateFormat(metadata: any): ValidationResult;
    /**
     * Clean metadata by removing invalid fields and normalizing values
     */
    cleanMetadata(meta: Partial<FrontmatterMetadata>): FrontmatterMetadata;
}

export { MetadataFormatValidator };