Zod v4 Handbook

Purpose

Use this as the single source of truth for Zod 4 usage in this repository. Keep lookup cheap: route to one file first, then follow See also only if that file is not enough.

Routing Rules

• Do not read this handbook linearly.
• Pick exactly one target file first.
• Start with a sections/*.md file for broad tasks.
• Start with a topics/*.md file for narrow API questions.
• Follow See also only when the first file is insufficient.
• Ignore release notes, versioning, migration, and library-author internals unless the user explicitly asks for them.