Class-validator - Quick Reference Full Reference : See advanced.md for custom validators, cross-field validation, validation groups, error formatting, and class-transformer integration. Deep Knowledge : Use with technology: for comprehensive documentation. Setup Basic Usage Common Decorators String Validators Number Validators Date Validators Array Validators Nested Object Validation Other Validators NestJS Integration Partial DTOs (for updates) Custom Validator (Basic) When NOT to Use This Skill - Client-side validation - Use Zod with React Hook Form - Non-NestJS backends - Zod is more frame…