Frontend & Design

Zod Schema Validation

Define and validate data schemas with Zod, providing type-safe runtime validation that integrates with TypeScript at compile time.

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Overview

Zod is a TypeScript-first schema validation library that lets you define schemas once and get both runtime validation and static type inference. AI agents can generate Zod schemas for API responses, form inputs, environment variables, and configuration files with automatic TypeScript type derivation.

The library's composable API lets you build complex schemas from primitives. Your AI agent can create schemas with transforms and refinements, implement discriminated unions for API responses, validate environment variables at startup, and generate schemas from existing TypeScript types or database models.

Zod integrates with virtually every tool in the ecosystem: React Hook Form, tRPC, Astro content collections, Next.js server actions, and many more. AI agents can help you implement end-to-end type safety from your API layer through your frontend forms, eliminating an entire class of runtime errors.

Who Is This For?

TypeScript developers validating API responses at runtime
Teams implementing end-to-end type safety with tRPC and Zod
Developers validating environment variables and configuration
Engineers generating TypeScript types from validation schemas

Installation

Setup for Claude Code

npm install zod

Configuration

// schemas.ts
import { z } from "zod";

export const UserSchema = z.object({
  id: z.string().uuid(),
  name: z.string().min(2).max(100),
  email: z.string().email(),
  role: z.enum(["admin", "user", "viewer"]),
  createdAt: z.coerce.date(),
});

export type User = z.infer<typeof UserSchema>;