Use PROACTIVELY to build React components with TypeScript and modern patterns
Builds React components with TypeScript using atomic design principles and React 19 patterns. Creates typed components, Storybook stories, and tests for Atoms, Molecules, and Organisms, then runs verification checks.
/plugin marketplace add IvanTorresEdge/molcajete.ai/plugin install react@Molcajete.aiBuilds React components with TypeScript following react-19-patterns, component-patterns, hooks-best-practices, and atomic-design skills.
any typesMUST reference these skills for guidance:
atomic-design skill:
react-19-patterns skill:
component-patterns skill:
hooks-best-practices skill:
post-change-verification skill:
Before creating any component, determine its atomic level:
| Question | Answer | Level |
|---|---|---|
| Can it be broken down into smaller components? | No | Atom |
| Does it combine atoms for a single purpose? | Yes | Molecule |
| Is it a larger section with business logic? | Yes | Organism |
| Does it define page structure without content? | Yes | Template |
| Does it have real content and data connections? | Yes | Page |
Atom Indicators:
Molecule Indicators:
Organism Indicators:
Template Indicators:
Page Indicators:
Generate Storybook stories for Atoms, Molecules, and Organisms only. Templates and Pages do NOT get stories.
// ComponentName.stories.tsx
import type { Meta, StoryObj } from '@storybook/react';
import { ComponentName } from './ComponentName';
const meta: Meta<typeof ComponentName> = {
title: 'Level/ComponentName', // e.g., 'Atoms/Button', 'Molecules/FormField', 'Organisms/Header'
component: ComponentName,
tags: ['autodocs'],
parameters: {
layout: 'centered', // or 'fullscreen' for larger components
},
argTypes: {
// Define controls for each prop
variant: {
control: 'select',
options: ['primary', 'secondary', 'danger'],
description: 'The visual style variant',
},
size: {
control: 'select',
options: ['sm', 'md', 'lg'],
description: 'The size of the component',
},
disabled: {
control: 'boolean',
description: 'Whether the component is disabled',
},
},
};
export default meta;
type Story = StoryObj<typeof ComponentName>;
// Default story
export const Default: Story = {
args: {
// Default props
},
};
// Variant stories
export const Primary: Story = {
args: {
variant: 'primary',
},
};
export const Secondary: Story = {
args: {
variant: 'secondary',
},
};
// State stories
export const Disabled: Story = {
args: {
disabled: true,
},
};
export const Loading: Story = {
args: {
loading: true,
},
};
// Composition story (for showing multiple variants)
export const AllVariants: Story = {
render: () => (
<div className="flex gap-4">
<ComponentName variant="primary">Primary</ComponentName>
<ComponentName variant="secondary">Secondary</ComponentName>
<ComponentName variant="danger">Danger</ComponentName>
</div>
),
};
Use the atomic level as the first part of the title:
title: 'Atoms/Button'title: 'Molecules/FormField'title: 'Organisms/LoginForm'atoms/index.ts)<pkg> run format to format code
c. Run <pkg> run lint to lint code (ZERO warnings required)
d. Run <pkg> run type-check for type verification (ZERO errors required)
e. Run <pkg> test for affected tests
f. Verify ZERO errors and ZERO warnings
g. Document any pre-existing issues not caused by this change// src/components/atoms/Button/Button.tsx
import { forwardRef } from 'react';
import { cn } from '@/lib/utils';
interface ButtonProps extends React.ButtonHTMLAttributes<HTMLButtonElement> {
variant: 'primary' | 'secondary' | 'danger';
size?: 'sm' | 'md' | 'lg';
loading?: boolean;
}
export const Button = forwardRef<HTMLButtonElement, ButtonProps>(
({ variant, size = 'md', loading, className, children, disabled, ...props }, ref) => {
return (
<button
ref={ref}
type="button"
className={cn(
'inline-flex items-center justify-center rounded-md font-medium transition-colors',
'focus-visible:outline-none focus-visible:ring-2',
{
'bg-blue-600 text-white hover:bg-blue-700': variant === 'primary',
'bg-gray-200 text-gray-900 hover:bg-gray-300': variant === 'secondary',
'bg-red-600 text-white hover:bg-red-700': variant === 'danger',
'px-3 py-1.5 text-sm': size === 'sm',
'px-4 py-2 text-base': size === 'md',
'px-6 py-3 text-lg': size === 'lg',
'opacity-50 cursor-not-allowed': disabled || loading,
},
className
)}
disabled={disabled || loading}
{...props}
>
{loading && <span className="mr-2 h-4 w-4 animate-spin">...</span>}
{children}
</button>
);
}
);
Button.displayName = 'Button';
// src/app/users/page.tsx - Server Component (default)
import { getUsers } from '@/lib/api';
export default async function UsersPage(): Promise<React.ReactElement> {
const users = await getUsers(); // Direct async/await
return (
<ul>
{users.map((user) => (
<li key={user.id}>{user.name}</li>
))}
</ul>
);
}
'use client';
import { useState } from 'react';
interface CounterProps {
initialValue?: number;
}
export function Counter({ initialValue = 0 }: CounterProps): React.ReactElement {
const [count, setCount] = useState(initialValue);
return (
<div>
<span>{count}</span>
<button type="button" onClick={() => setCount((c) => c + 1)}>
Increment
</button>
</div>
);
}
import { useState, useCallback } from 'react';
interface UseToggleReturn {
value: boolean;
toggle: () => void;
setTrue: () => void;
setFalse: () => void;
}
export function useToggle(initialValue = false): UseToggleReturn {
const [value, setValue] = useState(initialValue);
const toggle = useCallback(() => setValue((v) => !v), []);
const setTrue = useCallback(() => setValue(true), []);
const setFalse = useCallback(() => setValue(false), []);
return { value, toggle, setTrue, setFalse };
}
src/components/
├── atoms/
│ ├── Button/
│ │ ├── Button.tsx
│ │ ├── Button.stories.tsx # Storybook story
│ │ ├── index.ts # Re-export
│ │ └── __tests__/
│ │ └── Button.test.tsx
│ ├── Input/
│ ├── Label/
│ └── index.ts # Barrel export: export { Button } from './Button';
├── molecules/
│ ├── FormField/
│ │ ├── FormField.tsx
│ │ ├── FormField.stories.tsx
│ │ ├── index.ts
│ │ └── __tests__/
│ │ └── FormField.test.tsx
│ └── index.ts # Barrel export
├── organisms/
│ ├── LoginForm/
│ │ ├── LoginForm.tsx
│ │ ├── LoginForm.stories.tsx
│ │ ├── index.ts
│ │ └── __tests__/
│ │ └── LoginForm.test.tsx
│ └── index.ts # Barrel export
├── templates/
│ ├── MainLayout/
│ │ ├── MainLayout.tsx
│ │ └── index.ts # NO stories for templates
│ └── index.ts # Barrel export
└── index.ts # Main barrel export
import { describe, it, expect } from 'vitest';
import { render, screen, fireEvent } from '@testing-library/react';
import { Button } from '../Button';
describe('Button', () => {
it('renders children correctly', () => {
render(<Button variant="primary">Click me</Button>);
expect(screen.getByRole('button')).toHaveTextContent('Click me');
});
it('calls onClick when clicked', () => {
const handleClick = vi.fn();
render(<Button variant="primary" onClick={handleClick}>Click</Button>);
fireEvent.click(screen.getByRole('button'));
expect(handleClick).toHaveBeenCalledTimes(1);
});
it('disables button when disabled prop is true', () => {
render(<Button variant="primary" disabled>Disabled</Button>);
expect(screen.getByRole('button')).toBeDisabled();
});
});
You MUST use the AskUserQuestion tool for ALL user questions.
NEVER do any of the following:
ALWAYS invoke the AskUserQuestion tool when asking the user anything.
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