import type { Skill } from './types.js';
/**
 * Validate a skill's security constraints
 *
 * @throws {SkillValidationError} if validation fails
 */
export declare function validateSkillSecurity(skill: Skill): void;
/**
 * Validate file references in skill content
 *
 * Warns about external references and absolute paths
 */
export declare function validateSkillReferences(skill: Skill): string[];
/**
 * Validate a skill's metadata
 * Note: Zod already validates name format, max length, and description max length
 * This function only validates requirements not covered by Zod
 */
export declare function validateSkillMetadata(skill: Skill): string[];
/**
 * Get file statistics for a skill
 */
export declare function getSkillStats(skill: Skill): {
    totalSize: number;
    fileCount: number;
    largestFile: {
        name: string;
        size: number;
    };
};