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 HK-hub/AgentSkills --skill frontend-devgit clone --depth 1 https://github.com/HK-hub/AgentSkillsWrote 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/hk-hub/agentskills/frontend-dev)<a href="https://agentmods.dev/skills/hk-hub/agentskills/frontend-dev"><img src="https://agentmods.dev/badge/skills/hk-hub/agentskills/frontend-dev/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/hk-hub/agentskills/frontend-dev"><img src="https://agentmods.dev/badge/skills/hk-hub/agentskills/frontend-dev.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 | $0.00087 | $0.05466 |
| Opus 5 | $0.00044 | $0.02733 |
| Sonnet 5 | $0.00017 | $0.01093 |
| Haiku 4.5 | $0.00009 | $0.00547 |
Grade B, and why
frontend-dev scanned grade B 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 9d 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.
Asks the agent to reveal its instructionsmediumSystem prompt leakage
Directions to print, repeat or translate the system prompt extract configuration the operator did not intend to expose.
3. **Execute:** Show prompt to user, **MUST confirm before generating**, then run script This is a copy
97% identical to frontend-dev — 3 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 568 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Frontend Studio
Build complete, production-ready frontend pages by orchestrating 5 specialized capabilities: design engineering, motion systems, AI-generated assets, persuasive copy, and generative art.
Invocation
/frontend-dev <request>
The user provides their request as natural language (e.g. "build a landing page for a music streaming app").
Skill Structure
frontend-dev/
├── SKILL.md # Core skill (this file)
├── scripts/ # Asset generation scripts
│ ├── minimax_tts.py # Text-to-speech
│ ├── minimax_music.py # Music generation
│ ├── minimax_video.py # Video generation (async)
│ └── minimax_image.py # Image generation
├── references/ # Detailed guides (read as needed)
│ ├── minimax-cli-reference.md # CLI flags quick reference
│ ├── asset-prompt-guide.md # Asset prompt engineering rules
│ ├── minimax-tts-guide.md # TTS usage & voices
│ ├── minimax-music-guide.md # Music prompts & lyrics format
│ ├── minimax-video-guide.md # Camera commands & models
│ ├── minimax-image-guide.md # Ratios & batch generation
│ ├── minimax-voice-catalog.md # All voice IDs
│ ├── motion-recipes.md # Animation code snippets
│ ├── env-setup.md # Environment setup
│ └── troubleshooting.md # Common issues
├── templates/ # Visual art templates
│ ├── viewer.html # p5.js interactive art base
│ └── generator_template.js # p5.js code reference
└── canvas-fonts/ # Static art fonts (TTF + licenses)
Project Structure
Assets (Universal)
All frameworks use the same asset organization:
assets/
├── images/
│ ├── hero-landing-1710xxx.webp
│ ├── icon-feature-01.webp
│ └── bg-pattern.svg
├── videos/
│ ├── hero-bg-1710xxx.mp4
│ └── demo-preview.mp4
└── audio/
├── bgm-ambient-1710xxx.mp3
└── tts-intro-1710xxx.mp3
Asset naming: {type}-{descriptor}-{timestamp}.{ext}
What ships with it
60 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.
- canvas-fonts/ArsenalSC-OFL.txt 4.3 KB
- canvas-fonts/ArsenalSC-Regular.ttf 162 KB
- canvas-fonts/BigShoulders-Bold.ttf 92 KB
- canvas-fonts/BigShoulders-OFL.txt 4.3 KB
- canvas-fonts/BigShoulders-Regular.ttf 92 KB
- canvas-fonts/Boldonse-OFL.txt 4.3 KB
- canvas-fonts/Boldonse-Regular.ttf 75 KB
- canvas-fonts/BricolageGrotesque-Bold.ttf 89 KB
- canvas-fonts/BricolageGrotesque-OFL.txt 4.3 KB
- canvas-fonts/BricolageGrotesque-Regular.ttf 89 KB
- canvas-fonts/CrimsonPro-Bold.ttf 105 KB
- canvas-fonts/CrimsonPro-Italic.ttf 106 KB
- canvas-fonts/CrimsonPro-OFL.txt 4.3 KB
- canvas-fonts/CrimsonPro-Regular.ttf 104 KB
- canvas-fonts/DMMono-OFL.txt 4.3 KB
- canvas-fonts/DMMono-Regular.ttf 48 KB
- canvas-fonts/EricaOne-OFL.txt 4.3 KB
- canvas-fonts/EricaOne-Regular.ttf 24 KB
- canvas-fonts/GeistMono-Bold.ttf 76 KB
- canvas-fonts/GeistMono-OFL.txt 4.3 KB
- canvas-fonts/GeistMono-Regular.ttf 76 KB
- canvas-fonts/Gloock-OFL.txt 4.3 KB
- canvas-fonts/Gloock-Regular.ttf 93 KB
- canvas-fonts/IBMPlexMono-Bold.ttf 133 KB
- canvas-fonts/IBMPlexMono-OFL.txt 4.3 KB
- canvas-fonts/IBMPlexMono-Regular.ttf 131 KB
- canvas-fonts/IBMPlexSerif-Bold.ttf 157 KB
- canvas-fonts/IBMPlexSerif-BoldItalic.ttf 166 KB
- canvas-fonts/IBMPlexSerif-Italic.ttf 166 KB
- canvas-fonts/IBMPlexSerif-Regular.ttf 157 KB
- canvas-fonts/InstrumentSans-Bold.ttf 66 KB
- canvas-fonts/InstrumentSans-BoldItalic.ttf 68 KB
- canvas-fonts/InstrumentSans-Italic.ttf 68 KB
- canvas-fonts/InstrumentSans-OFL.txt 4.3 KB
- canvas-fonts/InstrumentSans-Regular.ttf 66 KB
- canvas-fonts/InstrumentSerif-Italic.ttf 69 KB
- canvas-fonts/InstrumentSerif-Regular.ttf 68 KB
- canvas-fonts/Italiana-OFL.txt 4.3 KB
- canvas-fonts/Italiana-Regular.ttf 27 KB
- canvas-fonts/JetBrainsMono-Bold.ttf 112 KB
- canvas-fonts/JetBrainsMono-OFL.txt 4.3 KB
- canvas-fonts/JetBrainsMono-Regular.ttf 112 KB
- canvas-fonts/Jura-Light.ttf 151 KB
- canvas-fonts/Jura-Medium.ttf 151 KB
- canvas-fonts/Jura-OFL.txt 4.3 KB
- canvas-fonts/LibreBaskerville-OFL.txt 4.3 KB
- canvas-fonts/LibreBaskerville-Regular.ttf 144 KB
- canvas-fonts/Lora-Bold.ttf 131 KB
- canvas-fonts/Lora-BoldItalic.ttf 137 KB
- canvas-fonts/Lora-Italic.ttf 136 KB
- canvas-fonts/Lora-OFL.txt 4.3 KB
- canvas-fonts/Lora-Regular.ttf 131 KB
- canvas-fonts/NationalPark-Bold.ttf 77 KB
- canvas-fonts/NationalPark-OFL.txt 4.3 KB
- canvas-fonts/NationalPark-Regular.ttf 75 KB
- canvas-fonts/NothingYouCouldDo-OFL.txt 4.3 KB
- canvas-fonts/NothingYouCouldDo-Regular.ttf 31 KB
- canvas-fonts/Outfit-Bold.ttf 54 KB
- canvas-fonts/Outfit-OFL.txt 4.3 KB
- canvas-fonts/Outfit-Regular.ttf 54 KB
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.
- 9d ago First seen · 568 lines · 87 tokens per session scan B e2d66a11f25a
frontend-dev is a skill published in the GitHub repository HK-hub/AgentSkills (6 stars, last pushed 25d ago), licensed MIT. It adds 87 tokens to every session and 5,466 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it B with 1 finding (asks the agent to reveal its instructions). It is 97% identical to frontend-dev, differing in 3 lines, and is treated as a copy.
Other skills, from other repositories
visual-verdict
Structured visual QA verdict for screenshot-to-reference comparisons.
interaction-skill
Layer A interaction-mechanics reference anchored to the beui.dev catalog. Stacks on any style skill whenever work adds or changes motion or interaction — micro-interactions, animated components, transitions, gestures, hover/press/state feedback, loading/success/error morphs, 'make it feel alive'. Mandates reading the…
layout-skill
Layer A layout-mechanics reference. Stacks on any style skill when the screen is an app shell, dashboard, settings, list-detail, mail/inbox, or any layout with fixed regions plus a scrolling body — or when a layout breaks under long, empty, or unbroken content. Owns spatial structure and scroll ownership; owns zero…
ui-design
Unify product UI design, frontend implementation, and verification. Use when asked to design, redesign, build, or fix a web, desktop, or mobile interface; a page, dashboard, form, component, design system, responsive layout, accessibility, interface animation, or editable hero/banner/infographic within a product…
frontend-design
A design guide for building polished web interfaces such as pages, dashboards, forms, navigation, and reusable UI components. It covers HTML, CSS, JavaScript, and common frontend frameworks.
frontend-philosophy
Visual & UI philosophy (The 5 Pillars of Intentional UI). Understand deeply to avoid "AI slop" and create distinctive, memorable interfaces.