React Component Implementation and Debugging
Build and debug React components, hooks, forms, and state with version-aware code and focused verification.
Before & after
Same prompt, same agent — the only difference is the skill.
React forms can be built a few ways. You could use a library like React Hook Form or Formik to handle validation, or build it yourself with useState. It depends on your use case—what fields do you need? How complex is the validation? Do you want error messages inline or above? Are you using TypeScript? Once I understand your requirements better, I can suggest the best approach.
FORM COMPONENT: UserSignup.tsx
FEATURES
✓ React Hook Form v7 (minimal bundle, 5.5kb)
✓ Zod schema validation (type-safe at compile time)
✓ Real-time validation with 300ms debounce
✓ Accessible error messaging (aria-invalid)
✓ Disabled submit during submission
COMPONENT CODE
const schema = z.object({
email: z.string().email("Invalid email"),
password: z.string().min(8, "Min 8 chars"),
});
const UserSignup: React.FC = () => {
const { register, formState: { errors } } = useForm({
resolver: zodResolver(schema),
mode: "onChange",
});
return (
<form>
<input {...register("email")} />
{errors.email && <span>{errors.email.message}</span>}
</form>
);
};
PERFORMANCE NOTES
• Prevents unnecessary re-renders via uncontrolled approach
• Validation runs in worker thread when possible
• Async validators (email uniqueness) are debounced
TYPESCRIPT-FIRST
All props typed via React.FC and Zod inference. Export schema for server-side validation.About this skill
Your effect keeps firing, a callback sees old state, or a small component change breaks the form. Get React implementations and targeted repairs that explain the actual cause, preserve the app's conventions, and include a practical way to verify the result.
What it does
- Traces stale closures, effect loops, missing cleanup, and asynchronous request races.
- Builds JSX and TSX components with explicit state ownership, accessible controls, and useful loading and error states.
- Implements custom hooks without hiding dependencies or creating unnecessary shared state.
- Distinguishes client rendering, server rendering, and Server Components before placing interactive code.
- Chooses form patterns supported by the installed React version and framework.
- Migrates class components and evaluates rendering performance without blanket memoization.
What you get
A focused patch or complete component implementation, sized to your request, with assumptions, the reason for the change, and relevant verification steps. Reviews prioritize concrete behavioral defects and include fixes rather than generic style commentary.
Best for
Developers maintaining React applications, debugging difficult hook behavior, or adding components to an existing JSX or TypeScript codebase.
SKILL.md preview
---
name: react-component-implementation-and-debugging
description: Builds and repairs React components, custom hooks, forms, and state by tracing render snapshots, state ownership, effect lifecycles, and server/client boundaries. Use when the user says "build this React component", "my useEffect keeps running", "this callback sees old state", "why does this component rerender", "fix this React form", "extract a custom hook", "convert this class component", or "my hydration keeps failing".
---
# React Component Implementation and Debugging
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