zod-validation-patternslisted

# Zod Validation Patterns Skill **Use this skill when:** Working with user input validation, API request validation, form data validation, or data transformation in Quetrex. ## Purpose This skill provides comprehensive patterns for using Zod validation library in TypeScript applications. It ensures input validation is done correctly, securely, and consistently across the codebase. ## What's Covered 1. **[Schema Patterns](./schema-patterns.md)** - Complete guide to all Zod schema types - Primitives (string, number, boolean, date) - Collections (array, object, map, set, record) - Advanced types (union, intersection, discriminated unions) - Optional/nullable patterns - Branded types and recursive schemas 2. **[Error Handling](./error-handling.md)** - Robust error management - Custom error messages - Internationalization (i18n) - Error formatting for UI display - Safe parsing patterns - Error recovery strategies 3. **[Refinements](./refinements.md)** - Custom validation logic - Basic and chained refinements - Cross-field validation - Conditional validation - Business logic validation - File upload validation 4. **[Transforms](./transforms.md)** - Data transformation and normalization - Type coercion - Data cleaning and normalization - Computed fields - Preprocessing patterns 5. **[Async Validation](./async-validation.md)** - Asynchronous validation patterns - Database uniqueness checks - API validations -