/**
 * Universal UUID implementation
 * Works in all environments: Browser, Node.js, Serverless
 */
export function v4() {
    // Use crypto.randomUUID if available (Node.js 19+, modern browsers)
    if (typeof crypto !== 'undefined' && crypto.randomUUID) {
        return crypto.randomUUID();
    }
    // Fallback implementation for older environments
    return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, (c) => {
        const r = Math.random() * 16 | 0;
        const v = c === 'x' ? r : (r & 0x3 | 0x8);
        return v.toString(16);
    });
}
// Named export to match uuid package API
export { v4 as uuidv4 };
// Default export for convenience
export default { v4 };
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