Zod Schema Validation

Design type-safe validation schemas with Zod. Generates runtime validators for API inputs, form data, environment variables, and config files with automatic TypeScript type inference and custom error messages.

This skill helps you implement robust data validation with Zod. It creates schemas for API request/response validation, form input parsing, environment variable checking, config file validation, and database row transforms. Produces TypeScript types automatically from schemas for end-to-end type safety.

When to use

Use when validating API inputs, parsing form submissions, checking environment variables at startup, validating config files, or anywhere you need runtime type checking with TypeScript inference.

Examples

API input validation

Validate and type API request bodies

Create Zod schemas for a user registration API — validate email format, password strength, optional fields, and return typed parsed data

Environment variables

Type-safe env var validation at startup

Build a Zod-based env validation module that checks all required environment variables at startup and fails fast with clear error messages