/**
 * Validator class - Static methods for username validation
 */
import type { ValidationResult } from './types.js';
/**
 * Static class for username validation operations
 */
export declare class Validator {
    /**
     * Validate a username and return detailed validation result
     */
    static validate(username: string): ValidationResult;
    /**
     * Check if a username is safe (quick check, no detailed feedback)
     */
    static isSafe(username: string): boolean;
    /**
     * Normalize a username by trimming and optionally lowercasing
     */
    static normalize(username: string, lowercase?: boolean): string;
    /**
     * Sanitize a username by removing unsafe characters
     */
    static sanitize(username: string): string;
    /**
     * Validate username against a specific regex pattern (from site config)
     */
    static matchesPattern(username: string, pattern: string): boolean;
}