Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add jezweb/claude-skills --skill favicon-gengit clone --depth 1 https://github.com/jezweb/claude-skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/jezweb/claude-skills/favicon-gen)<a href="https://agentmods.dev/skills/jezweb/claude-skills/favicon-gen"><img src="https://agentmods.dev/badge/skills/jezweb/claude-skills/favicon-gen/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/jezweb/claude-skills/favicon-gen"><img src="https://agentmods.dev/badge/skills/jezweb/claude-skills/favicon-gen.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk pass
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00081 | $0.01104 |
| Opus 5 | $0.00041 | $0.00552 |
| Sonnet 5 | $0.00016 | $0.00221 |
| Haiku 4.5 | $0.00008 | $0.00110 |
Grade A, and why
favicon-gen scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 11d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
This is a copy
89% identical to favicon-gen — 2 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 120 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Favicon Generator
Generate a complete favicon package from a logo, initials, or brand colours. Produces all required formats and HTML integration code.
Workflow
Step 1: Choose Your Approach
Have a logo with an icon element?
YES -> Extract icon from logo
NO -> Have text/initials?
YES -> Create monogram favicon
NO -> Use branded shape
Step 2: Create Source SVG
Extracted icon — copy icon paths from logo, centre in 32x32 viewBox, simplify for small sizes.
Monogram — use a template from assets/:
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 32 32">
<circle cx="16" cy="16" r="16" fill="#0066cc"/>
<text x="16" y="21" font-size="16" font-weight="bold"
text-anchor="middle" fill="#ffffff" font-family="sans-serif">AC</text>
</svg>
Branded shape — circle (universal), rounded square (modern), shield (security), hexagon (tech).
SVG templates available in assets/ directory.
Step 3: Generate All Formats
Requires ImageMagick (convert command). Install if needed: brew install imagemagick (macOS) or apt install imagemagick (Linux).
# ICO (16x16 + 32x32)
convert favicon.svg -define icon:auto-resize=16,32 favicon.ico
# Apple Touch Icon (180x180, SOLID background — transparent = black on iOS)
convert favicon.svg -resize 180x180 -background "#0066cc" -alpha remove apple-touch-icon.png
# Android/PWA icons
convert favicon.svg -resize 192x192 icon-192.png
convert favicon.svg -resize 512x512 icon-512.png
No ImageMagick? Use https://favicon.io to convert from the SVG instead.
Step 4: Create Web Manifest
Copy and customise assets/manifest.webmanifest:
{
"name": "Your Business Name",
"short_name": "Business",
"icons": [
{ "src": "/icon-192.png", "sizes": "192x192", "type": "image/png" },
{ "src": "/icon-512.png", "sizes": "512x512", "type": "image/png" }
],
"theme_color": "#0066cc",
"background_color": "#ffffff",
"display": "standalone"
}
What ships with it
8 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 11d ago First seen · 120 lines · 81 tokens per session scan A acf51c71e50e
favicon-gen is a skill published in the GitHub repository jezweb/claude-skills (1,000 stars, last pushed 2mo ago), licensed MIT. It adds 81 tokens to every session and 1,104 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. It is 89% identical to favicon-gen, differing in 2 lines, and is treated as a copy.
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