Zod v4

Use for Zod 4 guidance, routing, and API selection.

Scope and freshness

• Vendored sources come from colinhacks/zod, pinned in references/source-index.md.
• Prefer the current Zod 4 API surface represented by the vendored docs.
• If the user asks about changes newer than the pinned commit, state the freshness limit and recommend checking the latest upstream docs.
• For ordinary app code, prefer root imports:

import * as z from 'zod';

• Mention legacy subpaths like "zod/v4" only for migration or interoperability context.

What to recommend by default