Agent Skills

image-optimization

Optimize images for web to reduce file size without sacrificing quality. Use compression, modern formats, and responsive techniques for faster loading.

Install

npx skills add https://github.com/aj-geddes/useful-ai-prompts --skill image-optimization
SKILL.md

Image Optimization

Table of Contents

Overview

Images typically comprise 50% of page weight. Optimization dramatically improves performance, especially on mobile networks.

When to Use

  • Website optimization
  • Responsive image implementation
  • Performance improvement
  • Mobile experience enhancement
  • Before deployment

Quick Start

Minimal working example:

Format Selection:

JPEG:
  Best for: Photographs, complex images
  Compression: Lossy (quality 70-85)
  Size: ~50-70% reduction
  Tools: ImageMagick, TinyJPEG
  Command: convert image.jpg -quality 75 optimized.jpg

PNG:
  Best for: Icons, screenshots, transparent images
  Compression: Lossless
  Size: 10-30% reduction
  Tools: PNGQuant, OptiPNG
  Command: optipng -o3 image.png

WebP:
  Best for: Modern browsers (90% support)
  Compression: 25-35% better than JPEG/PNG
  Fallback: Use <picture> element
  Tools: cwebp
  Command: cwebp -q 75 image.jpg -o image.webp

SVG:
  Best for: Icons, logos, simple graphics
// ... (see reference guides for full implementation)

Reference Guides

Detailed implementations in the references/ directory:

Guide Contents
Image Compression & Formats Image Compression & Formats
Responsive Images Responsive Images
Optimization Process Optimization Process
Monitoring & Best Practices Monitoring & Best Practices

Best Practices

✅ DO

  • Follow established patterns and conventions
  • Write clean, maintainable code
  • Add appropriate documentation
  • Test thoroughly before deploying

❌ DON'T

  • Skip testing or validation
  • Ignore error handling
  • Hard-code configuration values

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