form-validation-expert

# Form & Validation Expert (2026 Edition) [English](#english) | [Bahasa Indonesia](#bahasa-indonesia) --- <a name="english"></a> ## English ### Orchestration & Integration Connects and orchestrates with relevant domain skills like `brainstorming`, `zero-to-prod-orchestrator`, and `session-memory-manager` to ensure cohesive execution. ### Description Production-grade guide for building robust, accessible, and user-friendly forms. Covers **React Hook Form v7+** with Zod/Valibot resolvers, **server-side validation** with `useActionState` + Zod, **multi-step form wizards**, **dynamic forms** from JSON Schema, **autofill-friendly patterns**, **optimistic form submission** with `useOptimistic`, **Conform** (progressive enhancement), and **form accessibility** (ARIA, error announcements). ### Trigger Conditions Activate this skill when: - Building forms with client-side validation (React Hook Form, Zod, Valibot). - Implementing server-side form validation with React 19 Server Actions. - Creating multi-step form wizards with state persistence. - Building dynamic forms generated from schema definitions. - Making forms accessible (ARIA attributes, error announcements). - Implementing file upload forms with drag-and-drop. - Optimizing forms for autofill and mobile usability. --- ### Form Library Selection Guide | Library | Best For | Key Strength | |---|---|---| | **React Hook Form + Zod** | Most React apps | Performance (uncontrolled), rich ecosy...