Zod (Schema Validation)

Overview

Zod is a TypeScript-first schema declaration and validation library. Define a schema once, get both runtime validation AND TypeScript types automatically via z.infer<>.

Version: Zod 4 (2025) / Zod 3.x widely used
Requirements: TypeScript ≥5.5, strict mode

Key Benefit: Single source of truth for validation and types — no drift between runtime checks and TypeScript.

When to Use This Skill