Getting it into your agent
This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.
/plugin marketplace add trtmn/agent-plugins/plugin install font-extractorWrote 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/trtmn/agent-plugins/font-extractor)<a href="https://agentmods.dev/skills/trtmn/agent-plugins/font-extractor"><img src="https://agentmods.dev/badge/skills/trtmn/agent-plugins/font-extractor/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/trtmn/agent-plugins/font-extractor"><img src="https://agentmods.dev/badge/skills/trtmn/agent-plugins/font-extractor.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00089 | $0.00721 |
| Opus 5.5 | $0.00036 | $0.00288 |
| Sonnet 5.5 | $0.00018 | $0.00144 |
| Haiku 4.5 | $0.00009 | $0.00072 |
Grade A, and why
font-extractor scanned grade A with 1 finding 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 1mo 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
- Bash(curl -L *:*) How it starts
The opening of the file, as written. The whole thing — 76 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Font Extractor
Extract all fonts used on a website and save them locally, organized by font family.
Workflow
- Ask — confirm where to save fonts (default:
./fonts/) - Download — find and download all font files from the site
- Organize — run the bundled script to sort them into family subdirectories
The heavy lifting of family detection is done by reading each font file's internal name table — no need to parse CSS family names.
Step 0: Confirm output location
Before downloading, ask the user where they'd like the fonts saved. Default to ./fonts/ if they don't have a preference. Use their chosen path in place of ./fonts/ throughout the remaining steps.
Step 1: Download all font files
Fetch the page HTML and find font file URLs. Use whatever approach gets the job done fastest:
- Parse
<link rel="stylesheet">tags, fetch each CSS file, extracturl(...)values from@font-faceblocks - Check
<link rel="preload" as="font">tags - Search inline
<style>blocks - If nothing turns up in CSS, search the JS bundle(s) for font file URLs (SPAs often embed them there)
- If using Claude-in-Chrome (
mcp__claude-in-chrome__*),read_network_requestswill catch dynamically loaded fonts
Font file extensions to look for: .woff2, .woff, .ttf, .otf, .eot
Download every font file URL you find into ./fonts/ (flat). Use curl -L with a Referer header matching the page URL — many CDNs require it:
mkdir -p ./fonts
curl -L -H "Referer: <page-url>" -o "./fonts/<filename>" "<font-url>"
Download all unique URLs. Do not deduplicate — different URLs may be different versions or formats of the same font, and the user may want all of them.
Step 2: Organize by family
Run the bundled organize script. It reads each font file's internal metadata to determine its family name, then moves files into ./fonts/<family>/ subdirectories:
uv run "$CLAUDE_PLUGIN_ROOT/skills/font-extractor/scripts/organize_fonts.py" ./fonts
What ships with it
1 file 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.
- 1mo ago First seen · 76 lines · 89 tokens per session scan A b013b3ab0fc9
font-extractor is a skill published in the GitHub repository trtmn/agent-plugins (2 stars, last pushed 11d ago), licensed Unlicense. It adds 89 tokens to every session and 721 once invoked, about $0.0004 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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