image-optimization SKILL.md skillA
image-optimization from secondsky/claude-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add secondsky/claude-skills/image-optimization@git:20251224.ba827cePins git:20251224.ba827ce in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- secondsky/claude-skills
- Path
plugins/image-optimization/skills/image-optimization/SKILL.md- Versions recorded
- 1
- Latest version
- git:20251224.ba827ce, committed Dec 24, 2025
- Size
- 1,946 bytes
- Repository stars
- 247
- License
- MIT
Optimizes images for web performance using modern formats, responsive techniques, and lazy loading strategies. Use when improving page load times, implementing responsive images, or preparing assets for production deployment.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Image Optimization
Optimize images for web performance with modern formats and responsive techniques.
## Format Selection
| Format | Best For | Compression |
|--------|----------|-------------|
| JPEG | Photos | Lossy, 50-70% reduction |
| PNG | Icons, transparency | Lossless, 10-30% |
| WebP | Modern browsers | 25-35% better than JPEG |
| AVIF | Next-gen | 50% better than JPEG |
| SVG | Logos, icons | Vector, scalable |
## Responsive Images
```html
<picture>
<source srcset="image.avif" type="image/avif">
<source srcset="image.webp" type="image/webp">
<img
src="image.jpg"
srcset="image-400.jpg 400w, image-800.jpg 800w, image-1200.jpg 1200w"
sizes="(max-width: 600px) 100vw, 50vw"
alt="Description"
loading="lazy"
decoding="async"
>
</picture>
```
## Lazy Loading
```html
<!-- Native lazy loading -->
<img src="image.jpg" loading="lazy" alt="Description">
<!-- With blur placeholder -->
<img
src="placeholder-blur.jpg"
data-src="image.jpg"
class="lazy"
alt="Description"
>
```
## Build Pipeline (Sharp)
```javascript
const sharp = require('sharp');
async function optimizeImage(input, output) {
await sharp(input)
…Read the whole file at its exact version.
How to install
mdr add secondsky/claude-skills/image-optimization@sha256:286ee570876617f6The line at the top of this page pins the label git:20251224.ba827ce, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_yyo2cuisn7nk44ok)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Dec 24, 2025.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (1946 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
secondsky/claude-skills · 247 stars · license MIT · pushed 2026-10-31 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_yyo2cuisn7nk44ok GET https://markdownregistry.com/api/v1/resolve?ref=secondsky/claude-skills/image-optimization GET https://markdownregistry.com/api/v1/blob/286ee570876617f663d63a6cfb8b595be9029d0113ae2fae83900ef6294e9ea6
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.
More from secondsky/claude-skills
Every file in secondsky/claude-skills