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 Sarthib7/agentsmith --skill frontend-design-guidelinesgit clone --depth 1 https://github.com/Sarthib7/agentsmithWrote 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/sarthib7/agentsmith/frontend-design-guidelines)<a href="https://agentmods.dev/skills/sarthib7/agentsmith/frontend-design-guidelines"><img src="https://agentmods.dev/badge/skills/sarthib7/agentsmith/frontend-design-guidelines/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/sarthib7/agentsmith/frontend-design-guidelines"><img src="https://agentmods.dev/badge/skills/sarthib7/agentsmith/frontend-design-guidelines.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 | $0.00198 | $0.03459 |
| Opus 5.5 | $0.00079 | $0.01384 |
| Sonnet 5.5 | $0.00040 | $0.00692 |
| Haiku 4.5 | $0.00020 | $0.00346 |
Grade B, and why
frontend-design-guidelines scanned grade B with 2 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Sends data to an external URLmediumData exfiltration
A POST to an outside endpoint may be telemetry or may be exfiltration; either way the mod talks to somewhere, and you should know where.
[ -n "$_CONVEX_URL" ] && curl -s -X POST "$_CONVEX_URL/api/mutation" -H "Content-Type: application/json" -d '{"path":"telemetry:track","args":{"skill":"frontend-design-guidelines","phase":"build","status":"success","vers Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
[ -n "$_CONVEX_URL" ] && curl -s -X POST "$_CONVEX_URL/api/mutation" -H "Content-Type: application/json" -d '{"path":"telemetry:track","args":{"skill":"frontend-design-guidelines","phase":"build","status":"success","vers 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 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.
- 1mo ago First seen · 209 lines · 198 tokens per session scan B 30a3825dd3a6
frontend-design-guidelines is a skill published in the GitHub repository Sarthib7/agentsmith (10 stars, last pushed 2d ago), with no licence file. It adds 198 tokens to every session and 3,459 once invoked, about $0.0008 per session on Opus 5.5. A static security scan graded it B with 2 findings (sends data to an external url, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
Other skills, from other repositories
frontend-crafting
You MUST use this when building, implementing, redesigning, reviewing, or refining user-facing interfaces - including pages, layouts, forms, navigation, dashboards, and reusable UI components in HTML, CSS, Vue, Nuxt, React, or other frontend frameworks. Also applies to frontend code changes involving responsive…
ui-mockup
Generate HTML/CSS mockups for UI design. Produces browser-previewable mockup files with placeholder data. Use when the user says ui-mockup, mockup, design UI, wireframe, or needs visual reference for a feature.
impeccable
Use when the user wants to design, redesign, shape, critique, audit, polish, clarify, distill, harden, optimize, adapt, animate, colorize, extract, or otherwise improve a frontend interface. Covers websites, landing pages, dashboards, product UI, app shells, components, forms, settings, onboarding, and empty states.…
frontend-design
Create distinctive, production-grade frontend interfaces with high design quality. Use this skill when the user asks to build web components, pages, artifacts, posters, or applications (examples include websites, landing pages, dashboards, React components, HTML/CSS layouts, or when styling/beautifying any web UI).…
playground
Creates interactive HTML playgrounds — self-contained single-file explorers that let users configure something visually through controls, see a live preview, and copy out a prompt. Use when the user asks to make a playground, explorer, or interactive tool for a topic.
frontend-design
Guidance for distinctive, intentional visual design when building new UI or reshaping an existing one. Helps with aesthetic direction, typography, and making choices that don't read as templated defaults.