Your zod schema is the single source of truth for types, validation, and the UI. Backed by zustand.
useField(form, "users.0.email") infers the value type from your schema. Writes are typed too — a typo'd path or wrong value type is a compile error.
Fields re-render only when their own slice changes. Field-scoped validation parses one field's subschema per keystroke, not the whole form — async refines included.
Validation owns one channel, your app owns the other. A background validation pass physically cannot wipe a "username taken" server error.
Dirtiness is computed from values vs initial values — no bookkeeping to drift. diff() gives you a PATCH-ready payload of exactly what changed.
Stable row IDs survive reorders, inserts, and removes — including edits that replace row objects.
TextField, NumberField, SelectField, CheckboxField ship with aria-invalid, aria-describedby, role="alert", and focus-first-error out of the box.