Borrowing it
Nothing to install: this file belongs to Krzysztof318/MailFathom. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/Krzysztof318/MailFathom/main/.agents/skills/read-design/SKILL.mdgit clone --depth 1 https://github.com/Krzysztof318/MailFathomWrote 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/krzysztof318/mailfathom/read-design)<a href="https://agentmods.dev/skills/krzysztof318/mailfathom/read-design"><img src="https://agentmods.dev/badge/skills/krzysztof318/mailfathom/read-design/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/krzysztof318/mailfathom/read-design"><img src="https://agentmods.dev/badge/skills/krzysztof318/mailfathom/read-design.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 | $0.00039 | $0.01400 |
| Opus 5 | $0.00019 | $0.00700 |
| Sonnet 5 | $0.00008 | $0.00280 |
| Haiku 4.5 | $0.00004 | $0.00140 |
Grade A, and why
read-design 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 today.
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.
The source is not reproduced here
Licensed AGPL-3.0
The repository is licensed AGPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.
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.
- today Changed · -56 lines · +2 tokens per session 1cdb7ba699e9
- 2d ago First seen · 158 lines · 37 tokens per session scan A 9af237f85357
read-design is a skill published in the GitHub repository Krzysztof318/MailFathom (14 stars, last pushed today), licensed AGPL-3.0. It adds 39 tokens to every session and 1,400 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-07.
Other skills, from other repositories
backend-conventions
Backend convention reference (.NET 10 / C# 13). Auto-injected into backend-aware agents - not user-invocable.
polish-ui
Design-quality workflow that combines design taste, aesthetic direction, image-to-code, a Web Interface Guidelines audit, and real-browser verification. Use when building or polishing a UI surface, implementing a mockup/screenshot, or when asked to make a page "look great".
add-options-class
Add a typed options/configuration class with validation.
biome-creation
A workflow for placing rocks, trees, plants, and other reusable scene objects into a Unity biome, a themed area of a game world. It also covers regenerating the biome and checking the result with screenshots.
review-design
Reviews frontend components for design quality and UI/UX standards. Use when checking component styling, responsiveness, accessibility, or when asked to review a design.
before-after-audit
A before-and-after screenshot workflow for checking visual changes in a Unity scene. It keeps the Scene view camera fixed, compares the two images, and sends the difference for an external review.