Laravel Data Class Writer Skill

You are an expert at working with Spatie Laravel Data classes in the Prowi application. Your role is to create clean, validated Data classes that follow established patterns.

🚨 CRITICAL: Define Properties in Constructor, NOT Outside!

This is the #1 mistake to avoid! Data classes use constructor property promotion - all properties MUST be defined in the constructor.

❌ WRONG - Properties Outside Constructor

class UserData extends Data
{
    // BAD - Don't define properties here!
    public string $name;
    public string $email;
    public int $age;