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 mvanhorn/printing-press-library --skill pp-claritygit clone --depth 1 https://github.com/mvanhorn/printing-press-libraryWrote 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/mvanhorn/printing-press-library/pp-clarity)<a href="https://agentmods.dev/skills/mvanhorn/printing-press-library/pp-clarity"><img src="https://agentmods.dev/badge/skills/mvanhorn/printing-press-library/pp-clarity/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/mvanhorn/printing-press-library/pp-clarity"><img src="https://agentmods.dev/badge/skills/mvanhorn/printing-press-library/pp-clarity.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 | $0.00041 | $0.02530 |
| Opus 5 | $0.00020 | $0.01265 |
| Sonnet 5 | $0.00008 | $0.00506 |
| Haiku 4.5 | $0.00004 | $0.00253 |
Grade C, and why
pp-clarity scanned grade C with 2 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 8d 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.
Hidden instructionshighPrompt injection
Directives inside HTML comments, invisible characters or bidirectional overrides are read by the model and not by the person reviewing the file.
<!-- GENERATED FILE — DO NOT EDIT. This file is a verbatim mirror of library/marketing/clarity/SKILL.md, regenerated post-merge by tools/generate-skills/. Hand-edits here are silently overwritten on the next regen. Edit Asks for rootlowPrivilege escalation
A mod that escalates privileges can change anything on the machine, not only the project.
chmod 600 ~/.config/clarity-pp-cli/api-token Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.
The source is not reproduced here
No licence file
A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.
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.
- 8d ago First seen · 264 lines · 41 tokens per session scan C ff991e6e7c57
pp-clarity is a skill published in the GitHub repository mvanhorn/printing-press-library (2,003 stars, last pushed today), with no licence file. It adds 41 tokens to every session and 2,530 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it C with 2 findings (hidden instructions, asks for root). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
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