export declare class YamlValidator {
    private static readonly YAML_BOMB_LIMITS;
    private static purifyWindow;
    private static purify;
    static parsePersonaMetadataSafely(yamlContent: string): any;
    private static sanitizeMetadata;
    /**
     * Initialize DOMPurify instance if not already initialized
     */
    private static initializePurify;
    /**
     * Sanitize string input using DOMPurify to prevent XSS attacks
     * This replaces the regex-based approach with a more robust solution
     */
    private static sanitizeString;
    /**
     * Reset static DOMPurify cache (useful for long-running processes)
     */
    static resetCache(): void;
}
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