Web Development Skill

Use this skill for all Adynato web projects and frontend development.

Image & Asset Management

Always Use img4web

When adding images or visual assets to any Adynato project, use adynato/img4web.

# Install globally
npm install -g @adynato/img4web

# Or use npx
npx @adynato/img4web <input> [options]

When to Use img4web

• Adding any new image to a project
• Processing user-uploaded images
• Optimizing existing unoptimized images
• Converting images to modern formats (WebP, AVIF)
• Generating responsive image sets

img4web Usage

# Basic optimization
npx @adynato/img4web ./src/images

# With specific output formats
npx @adynato/img4web ./image.png --formats webp,avif

# Generate responsive sizes
npx @adynato/img4web ./hero.jpg --sizes 640,1024,1920

# Watch mode during development
npx @adynato/img4web ./src/images --watch

Image Requirements

Use Case	Max Width	Formats	Quality
Hero/Banner	1920px	WebP, AVIF, fallback JPG	80-85
Content Images	1200px	WebP, AVIF	80
Thumbnails	400px	WebP	75
Icons/Logos	Original	SVG preferred, else PNG	Lossless
OG Images	1200x630	PNG or JPG	90

Image Component Pattern

Always use responsive images with modern format fallbacks:

// Next.js
import Image from 'next/image'

<Image
  src="/images/hero.webp"
  alt="Descriptive alt text"
  width={1920}
  height={1080}
  priority // for above-fold images
  placeholder="blur"
  blurDataURL={blurDataUrl}
/>

<!-- Plain HTML with picture element -->
<picture>
  <source srcset="/images/hero.avif" type="image/avif">
  <source srcset="/images/hero.webp" type="image/webp">
  <img src="/images/hero.jpg" alt="Descriptive alt text" loading="lazy">
</picture>

Asset Organization

public/
├── images/
│   ├── blog/
│   │   └── [post-slug]/
│   │       ├── cover.webp
│   │       ├── cover.avif
│   │       └── *.webp
│   ├── og/
│   │   └── [page-slug].png
│   ├── icons/
│   │   └── *.svg
│   └── hero/
│       └── *.webp
├── fonts/
│   └── *.woff2
└── videos/
    └── *.mp4

Component Patterns

File Naming

• Components: PascalCase.tsx (e.g., Button.tsx, NavBar.tsx)
• Utilities: camelCase.ts (e.g., formatDate.ts)
• Hooks: useCamelCase.ts (e.g., useAuth.ts)
• Types: types.ts or [feature].types.ts

Component Structure

// components/Button.tsx
import { type ReactNode } from 'react'

interface ButtonProps {
  children: ReactNode
  variant?: 'primary' | 'secondary'
  onClick?: () => void
}

export function Button({ children, variant = 'primary', onClick }: ButtonProps) {
  return (
    <button
      className={`btn btn-${variant}`}
      onClick={onClick}
    >
      {children}
    </button>
  )
}

Export Pattern

Prefer named exports over default exports:

// Good
export function Button() { ... }
export function Input() { ... }

// Avoid
export default function Button() { ... }

Performance Checklist

Before deploying any web project:

• All images processed through img4web
• Images use WebP/AVIF with fallbacks
• Above-fold images have priority or fetchpriority="high"
• Below-fold images have loading="lazy"
• Fonts are self-hosted as WOFF2
• Critical CSS is inlined
• JavaScript is code-split appropriately
• No layout shift (CLS) issues

Styling

Preferred Stack

1. Tailwind CSS - utility-first styling
2. CSS Modules - when component-scoped styles needed
3. CSS Variables - for theming and dynamic values

Tailwind Conventions

// Use consistent ordering: layout, spacing, sizing, typography, colors, effects
<div className="flex items-center gap-4 p-4 w-full text-sm text-gray-700 bg-white rounded-lg shadow-md">

Dark Mode

Always support dark mode:

<div className="bg-white dark:bg-gray-900 text-gray-900 dark:text-gray-100">