React 19 Component Scaffolder

React 19 Component Scaffolder

Generate React 19/19.2 components, pages, hooks, and supporting files from parameterized templates. Every template enforces the patterns codified in the sibling react skill — refs as regular props (never forwardRef), Context rendered directly as provider (never .Provider), form actions with useActionState + useFormStatus, inline document metadata, useSyncExternalStore for external subscriptions, and YMNNAE-compliant hook bodies.

When to Apply

• Creating a new React component (Server, Client, or unspecified — defaults to Server)
• Adding a new route/page in a React 19 app
• Building a form that needs progressive enhancement, optimistic UI, or pending state
• Setting up a new Context provider with state + dispatch split
• Writing a custom hook that subscribes to external state or wraps async work
• Modeling complex state with a typed reducer
• Adding document metadata (<title>, <meta>, <link>) or resource hints (preload, preconnect, prefetchDNS)
• The user says "scaffold", "boilerplate", "generate", "new component", "new page", "new hook", or names any of the template types

Available Templates

All filenames are kebab-case; the exported React identifier ({Name}, use{Name}) is PascalCase / camelCase.

How to Use

1. Identify the template that matches the user's request. If ambiguous, ask. Default to function-component for unqualified "make me a component" requests.
2. Read the template at assets/templates/{name}.template.
3. Read the related conventions at references/conventions.md — every template emits code that obeys these conventions.
4. Collect parameters (see "Parameters" below). Ask the user only for parameters you cannot infer from context.
5. Substitute placeholders in the template. Every placeholder is wrapped in {curly_braces}. Empty placeholders (e.g., {additional_hooks} when there are none) collapse to empty string.
6. Write each output file using the Write tool. Use the path conventions in config.json (module_path, route_path).
7. Mention the conventions enforced so the user understands why the generated code looks the way it does (e.g., "I used ref as a prop rather than forwardRef because…").

Parameters

Common parameters (most templates accept these):

Template-specific parameters are documented in each template's leading comments.

Setup

On first use, populate config.json with project-specific paths so generated files land in the right place. The defaults assume a standard src/-rooted project. To override interactively:

• module_path — Where components live (e.g., src/components, app/_components)
• route_path — Where Server Component pages live (e.g., app/, src/routes/)
• hooks_path — Where custom hooks live (e.g., src/hooks)
• test_runner — vitest (default) or jest (changes the imports in test templates)

Conforming Existing Code (Multi-File Refactor)

When the user asks to conform, modernize, or align existing components with this skill's conventions across one or more files — not to generate new code — follow references/_conform-algorithm.md instead of going file-by-file.

Two non-negotiables from that doc:

1. Judgment over grep. Every convention is keyed off a syntactic marker (forwardRef, <Context.Provider>, react-helmet, onSubmit=, react-dom/test-utils). Grep finds the easy cases and misses the disguised ones — a manually drilled callback ref because the author dodged forwardRef, a bespoke useState({ pending, error }) that's useActionState without the name, a document.title hand-roll. Use grep for inventory and post-hoc completeness only, never as the primary detector.
2. Convention-major, not file-major. Load all target files first, then sweep one convention at a time across all files in priority order (refs/context/forms first, naming/imports last). Reports group by convention, surfacing cross-file clusters.

For brand-new scaffolds, skip this — go straight to a template.

React 19 Patterns This Skill Refuses to Generate

• forwardRef(...) wrappers — emits function Name({ ref, ...props }) instead
• <Context.Provider value={...}> — emits <Context value={...}> instead
• useFormState — emits useActionState instead
• onSubmit handlers for mutations — emits <form action={serverAction}> instead
• useRef<T>() without an argument — emits useRef<T>(null)
• useEffect for derived state, parent notification, or POST-on-state-change — refuses entirely (see conventions: State derivation)
• react-dom/test-utils — emits import { act } from '@testing-library/react' instead
• Manual <link rel="preload"> JSX — emits preload() from react-dom instead
• react-helmet / react-helmet-async — emits inline <title>/<meta>/<link> instead

Gotchas

See gotchas.md. Empty on first release — gotchas accumulate as the skill is used.

Related Skills

• react — Authoritative React 19 best-practices distillation (44 rules). The templates in this skill emit code that conforms to those rules.