MengTo/Skills is a collection of reusable instruction folders that teach coding agents workflows for interface design, games, frontend systems, automations, and agent loops. Designers and developers use the skills to turn references, prompts, and implementation habits into repeatable work. The catalogue contains the project’s skills and supporting instruction.
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 MengTo/Skills --skill book-serif-indexgit clone --depth 1 https://github.com/MengTo/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/mengto/skills/book-serif-index)<a href="https://agentmods.dev/skills/mengto/skills/book-serif-index"><img src="https://agentmods.dev/badge/skills/mengto/skills/book-serif-index/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/mengto/skills/book-serif-index"><img src="https://agentmods.dev/badge/skills/mengto/skills/book-serif-index.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk warn
- NVIDIA SkillSpector 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 | $0.00033 | $0.00858 |
| Opus 5 | $0.00016 | $0.00429 |
| Sonnet 5 | $0.00007 | $0.00172 |
| Haiku 4.5 | $0.00003 | $0.00086 |
Grade A, and why
book-serif-index 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.
Copies of this mod
2 near-identical copies found in the catalogue:
- book-serif-index — 100% identical, 0 lines differ
- book-serif-index — 100% identical, 0 lines differ
How it starts
The opening of the file, as written. The whole thing — 53 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Book Serif Index Skill
Use When
- Create an archival book-reader design system with serif-led pages, mono index navigation, aged paper surfaces, margin notes, and a premium catalog frame.
Workflow
Scope
- Apply this as a full design-system direction when the interface should feel like a curated archival reader, manuscript viewer, or premium literary catalog.
- Use it for editorial experiences, story-driven product pages, archives, research interfaces, lore systems, or reading-centric layouts that need bookish structure and index navigation.
- This is not generic blog styling; it should combine immersive book surfaces with a technical or catalog-like outer frame.
Visual target
- Create a central reading surface that feels like an open book, folio spread, or archival document laid within a darker surrounding interface shell.
- Let typography lead the experience: display serif or gothic-inspired headings, readable serif body text, and mono utility labels for navigation, metadata, and indexing.
- Use aged paper tones, subtle texture, crease shadows, edge shading, and light wear so the main content surface feels tactile and collected.
- Surround the reading area with restrained index or catalog UI: sidebar sections, chapter markers, section lists, archive labels, or mono navigation rails.
- Keep the palette restrained and atmospheric: dark outer shell, warm paper interior, muted ink tones, and one selective accent color derived from the design. If no brand accent exists, a subdued oxblood, bronze, or antique gold is acceptable.
Implementation guidance
- Prefer a two-zone composition: a darker outer interface frame plus a lighter book-like content surface centered inside it.
- Use serif body copy with generous line height for readability, then pair it with mono labels, tracking-heavy section names, and quiet metadata for contrast.
- Build the book surface with gradients, inset shadows, subtle center crease treatment, edge shadows, and light paper texture so it reads as layered material rather than a flat beige card.
- Include index-like navigation patterns such as chapter lists, section trees, archive groupings, or sidebar entries with active states and small markers.
- Add scholarly details like drop caps, marginalia boxes, block labels, annotations, citations, folio markers, or footer metadata to reinforce the editorial system.
- Motion should stay calm and literary: masked text reveals, gentle entrance motion, slow ambient background drift, and restrained hover cues.
What ships with it
7 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 · 53 lines · 33 tokens per session scan A d53a95a47bb0
book-serif-index is a skill published in the GitHub repository MengTo/Skills (5,919 stars, last pushed 13d ago), licensed MIT. It adds 33 tokens to every session and 858 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 2026-08-30.
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