react-hook-form

Provides 41 prioritized performance rules for React Hook Form across form configuration, field subscription, controlled components, validation, and field arrays. Invoke when writing or reviewing forms with useForm, useWatch, useController, or useFieldArray; integrating shadcn/MUI with Controller; or diagnosing unexpected re-renders in RHF-based forms. Covers client-side validation only — does not cover React Server Actions or useActionState.