Zod LLM Documentation
Zod provides comprehensive LLM-optimized documentation at https://zod.dev/llms.txt.
When to Use
Fetch this documentation when:
- Defining TypeScript-first schemas for data validation
- Working with Zod 4's new features (codecs, metadata, registries)
- Converting schemas to/from JSON Schema
- Customizing or formatting validation errors
- Integrating with form libraries or API validation
- Using Zod Mini for bundle size optimization
Key Topics Covered
- Schema Types: Primitives, Objects, Arrays, Unions, Records, Tuples
- String Validation: Email, UUID, URL, ISO datetime, IP addresses, JWT
- Transformations: Refinements, Transforms, Pipes, Codecs
- Error Handling: Custom errors, Formatting, Internationalization
- Advanced: Recursive objects, Discriminated unions, Branded types
- JSON Schema: Conversion, Metadata, Registries
Quick Reference
// Fetch Zod docs via Firecrawl
const docs = await firecrawl.scrape({
url: "https://zod.dev/llms.txt",
formats: ["markdown"]
});Common Schema Patterns
import { z } from "zod";
// Basic object schema
const userSchema = z.object({
id: z.string().uuid(),
email: z.string().email(),
age: z.number().int().positive(),
role: z.enum(["admin", "user"]),
});
// Infer TypeScript type
type User = z.infer<typeof userSchema>;Zod 4 Features
| Feature | Description |
|---|---|
| Codecs | Bidirectional encode/decode |
| Metadata | Attach metadata to schemas |
| Registries | Organize and reference schemas |
| Zod Mini | Tree-shakable minimal build |
| JSON Schema | Native conversion support |
Related Skills
effect-patterns- Effect TypeScript (uses Zod-like Schema)better-auth- Uses Zod for validation