bighardperson/computer-science-skills-collection/frontend-dev

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}

By Framework

Pure HTML

project/
├── index.html
├── assets/
│   ├── images/
│   ├── videos/
│   └── audio/
├── css/
│   └── styles.css
└── js/
    └── main.js           # Animations (GSAP/vanilla)

React / Next.js

project/
├── public/assets/        # Static assets
├── src/
│   ├── components/
│   │   ├── ui/           # Button, Card, Input
│   │   ├── sections/     # Hero, Features, CTA
│   │   └── motion/       # RevealSection, StaggerGrid
│   ├── lib/
│   ├── styles/
│   └── app/              # Pages
└── package.json

Vue / Nuxt

project/
├── public/assets/
├── src/                  # or root for Nuxt
│   ├── components/
│   │   ├── ui/
│   │   ├── sections/
│   │   └── motion/
│   ├── composables/      # Shared logic
│   ├── pages/
│   └── assets/           # Processed assets (optional)
└── package.json

Astro

project/
├── public/assets/
├── src/
│   ├── components/       # .astro, .tsx, .vue, .svelte
│   ├── layouts/
│   ├── pages/
│   └── styles/
└── package.json

Component naming: PascalCase (HeroSection.tsx, HeroSection.vue, HeroSection.astro)

Compliance

All rules in this skill are mandatory. Violating any rule is a blocking error — fix before proceeding or delivering.

Workflow

Phase 1: Design Architecture

1. Analyze the request — determine page type and context
2. Set design dials based on page type
3. Plan layout sections and identify asset needs

Phase 2: Motion Architecture

1. Select animation tools per section (see Tool Selection Matrix)
2. Plan motion sequences following performance guardrails

Phase 3: Asset Generation

Generate all image/video/audio assets using scripts/. NEVER use placeholder URLs (unsplash, picsum, placeholder.com, via.placeholder, placehold.co, etc.) or external URLs.

1. Parse asset requirements (type, style, spec, usage)
2. Craft optimized prompts, show to user, confirm before generating
3. Execute via scripts, save to project — do NOT proceed to Phase 5 until all assets are saved locally

Phase 4: Copywriting & Content

Follow copywriting frameworks (AIDA, PAS, FAB) to craft all text content. Do NOT use "Lorem ipsum" — write real copy.

Phase 5: Build UI

Scaffold the project and build each section following Design and Motion rules. Integrate generated assets and copy. All <img>, <video>, <source>, and CSS background-image MUST reference local assets from Phase 3.

Phase 6: Quality Gates

Run final checklist (see Quality Gates section).

1. Design Engineering

1.1 Baseline Configuration

Adapt dynamically based on user requests.

1.2 Architecture Conventions

• DEPENDENCY VERIFICATION: Check package.json before importing any library. Output install command if missing.
• Framework: React/Next.js. Default to Server Components. Interactive components must be isolated "use client" leaf components.
• Styling: Tailwind CSS. Check version in package.json — NEVER mix v3/v4 syntax.
• ANTI-EMOJI POLICY: NEVER use emojis anywhere. Use Phosphor or Radix icons only.
• Viewport: Use min-h-[100dvh] not h-screen. Use CSS Grid not flex percentage math.
• Layout: max-w-[1400px] mx-auto or max-w-7xl.

1.3 Design Rules

1.4 Anti-Slop Techniques

• Liquid Glass: backdrop-blur + border-white/10 + shadow-[inset_0_1px_0_rgba(255,255,255,0.1)]
• Magnetic Buttons: Use useMotionValue/useTransform — never useState for continuous animations
• Perpetual Motion: When INTENSITY > 5, add infinite micro-animations (Pulse, Float, Shimmer)
• Layout Transitions: Use Framer layout and layoutId props
• Stagger: Use staggerChildren or CSS animation-delay: calc(var(--index) * 100ms)

1.5 Forbidden Patterns

1.6 Creative Arsenal

1.7 Bento Paradigm

• Palette: Background #f9fafb, cards pure white with border-slate-200/50
• Surfaces: rounded-[2.5rem], diffusion shadow
• Typography: Geist/Satoshi, tracking-tight headers
• Labels: Outside and below cards
• Animation: Spring physics (stiffness: 100, damping: 20), infinite loops, React.memo isolation

5-Card Archetypes:

1. Intelligent List — auto-sorting with layoutId
2. Command Input — typewriter + blinking cursor
3. Live Status — breathing indicators
4. Wide Data Stream — infinite horizontal carousel
5. Contextual UI — staggered highlight + float-in toolbar

1.8 Brand Override

When brand styling is active:

• Dark: #141413, Light: #faf9f5, Mid: #b0aea5, Subtle: #e8e6dc
• Accents: Orange #d97757, Blue #6a9bcc, Green #788c5d
• Fonts: Poppins (headings), Lora (body)

2. Motion Engine

2.1 Tool Selection Matrix

Conflict Rules [MANDATORY]:

• NEVER mix GSAP + Framer Motion in same component
• R3F MUST live in isolated Canvas wrapper
• ALWAYS lazy-load Lottie, GSAP, Three.js

2.2 Intensity Scale

2.3 Animation Recipes

See references/motion-recipes.md for full code. Summary:

2.4 Performance Rules

GPU-only properties (ONLY animate these): transform, opacity, filter, clip-path

NEVER animate: width, height, top, left, margin, padding, font-size — if you need these effects, use transform: scale() or clip-path instead.

Isolation:

• Perpetual animations MUST be in React.memo leaf components
• will-change: transform ONLY during animation
• contain: layout style paint on heavy containers

Mobile:

• ALWAYS respect prefers-reduced-motion
• ALWAYS disable parallax/3D on pointer: coarse
• Cap particles: desktop 800, tablet 300, mobile 100
• Disable GSAP pin on mobile < 768px

Cleanup: Every useEffect with GSAP/observers MUST return () => ctx.revert()

2.5 Springs & Easings