SEO Images

What it does

When your agent uses it

• User says image optimization
• Tasks that involve Web performance

Example prompts

• “image optimization”
• “alt text”
• “image SEO”
• “/seo-images”

Requirements

• Pre-approved tools (allowed-tools): Read, Grep, Glob, Bash, WebFetch

Workflow steps

5 steps, taken from the first numbered list in SKILL.md.

1. 1Convert X images to WebP format (est. XX KB savings)
2. 2Add alt text to X images
3. 3Add dimensions to X images
4. 4Enable lazy loading on X below-fold images
5. 5Compress X oversized images

What it can do on your machine

Read from SKILL.md and the folder at commit 1c7bdea. It shows what the files ask for, not the result of running them.

• Tool permissions

  Pre-approves these tools, so the agent can use them without asking each time:

  • Read
  • Grep
  • Glob
  • Bash
  • WebFetch

  From allowed-tools in the SKILL.md frontmatter.

• Runs code

  No scripts in the folder and no shell commands in SKILL.md (its code samples are html).

  From the folder's file list and the shell code blocks in SKILL.md.

• Network

  No URLs in SKILL.md.

  From URLs in SKILL.md, links to its own repository left out.

• Credentials

  Names no API keys, tokens, secrets or passwords.

  From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

SEO Images loads about 1.7k tokens when it runs. Until then it costs about 63 tokens; SKILL.md has 633 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~63

When it runs · the whole SKILL.md, loaded when a task matches

~1.7k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

• NotePre-approves every shell command (allowed-tools: Bash)SKILL.md

  allowed-tools: Read, Grep, Glob, Bash, WebFetch

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from sickn33/agentic-awesome-skills at commit 1c7bdea, republished under its MIT licence (© sickn33). 633 words, ~1,692 tokens.

name

seo-images

description

Image optimization analysis for SEO and performance. Checks alt text, file sizes, formats, responsive images, lazy loading, and CLS prevention. Use when user says "image optimization", "alt text", "image SEO", "image size", or "image audit".

allowed-tools

Read, Grep, Glob, Bash, WebFetch

risk

safe

source

https://github.com/AgriciDaniel/claude-seo

date_added

2026-03-21

user-invokable

true

argument-hint

[url]

<picture>
  <source srcset="image.avif" type="image/avif">
  <source srcset="image.webp" type="image/webp">
  <img src="image.jpg" alt="Descriptive alt text" width="800" height="600" loading="lazy" decoding="async">
</picture>

<img
  src="image-800.jpg"
  srcset="image-400.jpg 400w, image-800.jpg 800w, image-1200.jpg 1200w"
  sizes="(max-width: 600px) 400px, (max-width: 1200px) 800px, 1200px"
  alt="Description"
>

<!-- Below fold - lazy load -->
<img src="photo.jpg" loading="lazy" alt="Description">

<!-- Above fold - eager load (default) -->
<img src="hero.jpg" alt="Hero image">

<img src="hero.webp" fetchpriority="high" alt="Hero image description" width="1200" height="630">

<img src="photo.webp" alt="Description" width="600" height="400" loading="lazy" decoding="async">

<!-- Good - dimensions set -->
<img src="photo.jpg" width="800" height="600" alt="Description">

<!-- Good - CSS aspect ratio -->
<img src="photo.jpg" style="aspect-ratio: 4/3" alt="Description">

<!-- Bad - no dimensions -->
<img src="photo.jpg" alt="Description">

© sickn33, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in skills/seo-images of sickn33/agentic-awesome-skills.

Open the folder on GitHubat commit 1c7bdea

Used in 3 other repositories

We found 12 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 3 other GitHub owners. This page covers the copy in sickn33/agentic-awesome-skills, which our catalogue first saw on October 9, 2026.

• lingxling/awesome-skills-cnantigravity-awesome-skills/skills/seo-imagesantigravity-awesome-skills/plugins/agentic-awesome-skills/skills/seo-images+1 more
• hashgraph-online/awesome-codex-pluginsplugins/BestLemoon/codex-seo/skills/seo-images
• henryalouf/ruflow.agents/skills/seo-images.agents/skills/antigravity-awesome-skills/skills/seo-images+4 more