Zod v4 Patterns for kove-webapp

This skill ensures consistent usage of Zod v4 patterns and prevents deprecated v3 syntax.

When to Apply

Use these patterns when:

• Creating new validation schemas
• Defining form validation with React Hook Form
• Writing API request/response validators
• Updating existing Zod schemas from v3
• Adding custom error messages to validators

Critical Pattern Changes from v3 to v4

1. Error Customization (Most Important)