TanStack Form for React: type-safe, performant, composable form management with validation, arrays, linked fields, listeners, and SSR support. Use when writing, reviewing, or refactoring React form code with TanStack Form: (1) Creating forms with useForm or createFormHook, (2) Adding field-level or form-level validation (sync, async, schema-based with Zod/Valibot/ArkType), (3) Working with form.Field, form.AppField, form.Subscribe, useStore, (4) Managing array fields, linked fields, or dynamic validation, (5) Composing forms with withForm, withFieldGroup, or createFormHook, (6) Integrating with UI libraries (shadcn/ui, Material UI, Mantine, Chakra UI), (7) Setting up SSR with Next.js, TanStack Start, or Remix, (8) Debugging form state, TypeScript errors, or controlled input warnings, (9) Using listeners for side effects, (10) Handling form submission with meta or schema transforms.