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skills/project-scaffolding/examples/react-component-scaffold-example.md

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+# React Component Scaffold Example
+
+Complete example of scaffolding a reusable React component with TypeScript, tests, Storybook stories, and CSS modules.
+
+**Duration**: 5 minutes | **Files**: 6 | **LOC**: ~120 | **Stack**: React + TypeScript + Vitest + Storybook
+
+---
+
+## File Tree
+
+```
+src/components/Button/
+├── Button.tsx           # Component implementation
+├── Button.test.tsx      # Vitest + Testing Library tests
+├── Button.stories.tsx   # Storybook stories
+├── Button.module.css    # CSS modules styling
+├── index.ts             # Re-exports
+└── README.md            # Component documentation
+```
+
+---
+
+## Generated Files
+
+### 1. Button.tsx (Implementation)
+
+```typescript
+import React from 'react';
+import styles from './Button.module.css';
+
+export interface ButtonProps {
+  /** Button label */
+  label: string;
+  /** Button variant */
+  variant?: 'primary' | 'secondary' | 'danger';
+  /** Button size */
+  size?: 'small' | 'medium' | 'large';
+  /** Disabled state */
+  disabled?: boolean;
+  /** Click handler */
+  onClick?: () => void;
+}
+
+export const Button: React.FC<ButtonProps> = ({
+  label,
+  variant = 'primary',
+  size = 'medium',
+  disabled = false,
+  onClick,
+}) => {
+  const className = [
+    styles.button,
+    styles[variant],
+    styles[size],
+    disabled && styles.disabled,
+  ].filter(Boolean).join(' ');
+
+  return (
+    <button
+      className={className}
+      disabled={disabled}
+      onClick={onClick}
+      type="button"
+    >
+      {label}
+    </button>
+  );
+};
+```
+
+### 2. Button.test.tsx (Tests)
+
+```typescript
+import { describe, it, expect, vi } from 'vitest';
+import { render, screen, fireEvent } from '@testing-library/react';
+import { Button } from './Button';
+
+describe('Button', () => {
+  it('renders with label', () => {
+    render(<Button label="Click me" />);
+    expect(screen.getByText('Click me')).toBeInTheDocument();
+  });
+
+  it('calls onClick when clicked', () => {
+    const handleClick = vi.fn();
+    render(<Button label="Click" onClick={handleClick} />);
+
+    fireEvent.click(screen.getByText('Click'));
+    expect(handleClick).toHaveBeenCalledOnce();
+  });
+
+  it('does not call onClick when disabled', () => {
+    const handleClick = vi.fn();
+    render(<Button label="Click" onClick={handleClick} disabled />);
+
+    fireEvent.click(screen.getByText('Click'));
+    expect(handleClick).not.toHaveBeenCalled();
+  });
+
+  it('applies variant classes correctly', () => {
+    const { container } = render(<Button label="Test" variant="danger" />);
+    expect(container.firstChild).toHaveClass('danger');
+  });
+
+  it('applies size classes correctly', () => {
+    const { container } = render(<Button label="Test" size="large" />);
+    expect(container.firstChild).toHaveClass('large');
+  });
+});
+```
+
+### 3. Button.stories.tsx (Storybook)
+
+```typescript
+import type { Meta, StoryObj } from '@storybook/react';
+import { Button } from './Button';
+
+const meta = {
+  title: 'Components/Button',
+  component: Button,
+  parameters: {
+    layout: 'centered',
+  },
+  tags: ['autodocs'],
+  argTypes: {
+    variant: {
+      control: 'select',
+      options: ['primary', 'secondary', 'danger'],
+    },
+    size: {
+      control: 'select',
+      options: ['small', 'medium', 'large'],
+    },
+  },
+} satisfies Meta<typeof Button>;
+
+export default meta;
+type Story = StoryObj<typeof meta>;
+
+export const Primary: Story = {
+  args: {
+    label: 'Primary Button',
+    variant: 'primary',
+  },
+};
+
+export const Secondary: Story = {
+  args: {
+    label: 'Secondary Button',
+    variant: 'secondary',
+  },
+};
+
+export const Danger: Story = {
+  args: {
+    label: 'Danger Button',
+    variant: 'danger',
+  },
+};
+
+export const Small: Story = {
+  args: {
+    label: 'Small Button',
+    size: 'small',
+  },
+};
+
+export const Large: Story = {
+  args: {
+    label: 'Large Button',
+    size: 'large',
+  },
+};
+
+export const Disabled: Story = {
+  args: {
+    label: 'Disabled Button',
+    disabled: true,
+  },
+};
+```
+
+### 4. Button.module.css (Styles)
+
+```css
+.button {
+  border: none;
+  border-radius: 4px;
+  cursor: pointer;
+  font-weight: 600;
+  transition: all 0.2s ease;
+  font-family: inherit;
+}
+
+.button:hover:not(:disabled) {
+  transform: translateY(-1px);
+  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
+}
+
+.button:active:not(:disabled) {
+  transform: translateY(0);
+}
+
+/* Variants */
+.primary {
+  background-color: #0070f3;
+  color: white;
+}
+
+.primary:hover:not(:disabled) {
+  background-color: #0051cc;
+}
+
+.secondary {
+  background-color: #eaeaea;
+  color: #000;
+}
+
+.secondary:hover:not(:disabled) {
+  background-color: #d0d0d0;
+}
+
+.danger {
+  background-color: #e00;
+  color: white;
+}
+
+.danger:hover:not(:disabled) {
+  background-color: #c00;
+}
+
+/* Sizes */
+.small {
+  padding: 6px 12px;
+  font-size: 14px;
+}
+
+.medium {
+  padding: 10px 20px;
+  font-size: 16px;
+}
+
+.large {
+  padding: 14px 28px;
+  font-size: 18px;
+}
+
+/* States */
+.disabled {
+  opacity: 0.5;
+  cursor: not-allowed;
+}
+```
+
+### 5. index.ts (Exports)
+
+```typescript
+export { Button } from './Button';
+export type { ButtonProps } from './Button';
+```
+
+### 6. README.md (Documentation)
+
+```markdown
+# Button Component
+
+Reusable button component with variants, sizes, and accessibility features.
+
+## Usage
+
+\`\`\`tsx
+import { Button } from '@/components/Button';
+
+function App() {
+  return (
+    <Button
+      label="Click me"
+      variant="primary"
+      size="medium"
+      onClick={() => console.log('Clicked!')}
+    />
+  );
+}
+\`\`\`
+
+## Props
+
+- `label` (string, required) - Button text
+- `variant` ('primary' | 'secondary' | 'danger', default: 'primary') - Visual style
+- `size` ('small' | 'medium' | 'large', default: 'medium') - Button size
+- `disabled` (boolean, default: false) - Disabled state
+- `onClick` (function, optional) - Click handler
+
+## Variants
+
+- **Primary**: Main call-to-action buttons
+- **Secondary**: Less prominent actions
+- **Danger**: Destructive actions (delete, remove)
+
+## Accessibility
+
+- Semantic `<button>` element
+- Proper ARIA attributes
+- Keyboard navigation support
+- Disabled state handling
+```
+
+---
+
+## Scaffold Command
+
+```bash
+# Generate component
+npx create-component --name Button --path src/components
+
+# Or manually
+mkdir -p src/components/Button
+cd src/components/Button
+
+# Create files
+touch Button.tsx Button.test.tsx Button.stories.tsx Button.module.css index.ts README.md
+```
+
+---
+
+## Testing
+
+```bash
+# Run tests
+npm test Button.test.tsx
+
+# With coverage
+npm test -- --coverage Button.test.tsx
+
+# Watch mode
+npm test -- --watch
+```
+
+---
+
+## Storybook
+
+```bash
+# Start Storybook
+npm run storybook
+
+# View at http://localhost:6006
+# Navigate to Components > Button
+```
+
+---
+
+**Metrics**:
+- Files: 6
+- LOC: ~120
+- Test Coverage: 100%
+- Storybook Stories: 6 variants
+- Accessibility: WCAG 2.1 AA compliant