ReddRadar
Agent skill
ux-prototyping
Create interactive single-file HTML prototypes for UX validation. Use when the user asks to create a prototype, mockup, or interactive wireframe based on specs/architecture/ux.md or any UX specification. Triggers include requests like "create a prototype", "build a prototype from the UX spec", "make an interactive mockup", "prototype the user flow", or "validate the UX".
Install this agent skill to your Project
npx add-skill https://github.com/aiskillstore/marketplace/tree/main/skills/emz1998/ux-prototyping
SKILL.md
UX Prototyping Skill
Create single-file HTML prototypes focused on validating user flows, interaction patterns, and information architecture. Prioritize UX fidelity over visual polish.
Workflow
- Read the UX spec at
specs/architecture/ux.md(or user-specified path) - Identify core flows - Extract user journeys, screens, states, and interactions
- Build prototype - Create single HTML file with all screens and interactions
- Output - Save to
/mnt/user-data/outputs/prototype.html
Prototype Structure
Generate a single HTML file containing:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>[App Name] - UX Prototype</title>
<style>/* All CSS inline */</style>
</head>
<body>
<!-- All screens as sections -->
<!-- Navigation/state management -->
<script>/* All JS inline */</script>
</body>
</html>
Core Principles
UX First, UI Second
- Do: Implement all user flows, states, transitions, error states, empty states
- Do: Make interactions feel responsive and logical
- Do: Show realistic data and content hierarchy
- Defer: Pixel-perfect styling, animations, brand colors (use clean defaults)
Screen Management Pattern
Implement screens as <section> elements with data-screen attributes:
function showScreen(screenId) {
document.querySelectorAll('[data-screen]').forEach(s => s.hidden = true);
document.querySelector(`[data-screen="${screenId}"]`).hidden = false;
}
State Management Pattern
Use a simple state object:
const state = { currentScreen: 'home', user: null, data: [] };
function setState(updates) { Object.assign(state, updates); render(); }
Essential UX Elements
1. User Flows
- Primary task completion paths
- Alternative/secondary flows
- Error recovery flows
2. Screen States
- Empty - First-time user, no data
- Loading - Skeleton or spinner
- Error - Network/validation errors
- Success - Confirmations
- Partial - Some data loaded
3. Interactions
- Form inputs with validation
- Button states (hover/active/disabled)
- Screen navigation
- Modal/overlay behaviors
Base Styles
* { box-sizing: border-box; margin: 0; padding: 0; }
:root {
--bg: #f8fafc; --surface: #fff; --text: #1e293b;
--text-muted: #64748b; --primary: #3b82f6; --border: #e2e8f0;
--success: #22c55e; --error: #ef4444; --radius: 8px;
}
body { font-family: system-ui, sans-serif; background: var(--bg); color: var(--text); }
[data-screen] { display: none; }
[data-screen].active { display: block; }
.card { background: var(--surface); border-radius: var(--radius); padding: 1.5rem; box-shadow: 0 1px 3px rgba(0,0,0,0.1); }
.btn { padding: 0.625rem 1.25rem; border-radius: var(--radius); font-weight: 500; cursor: pointer; border: none; }
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: #2563eb; }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; }
.input { width: 100%; padding: 0.625rem; border: 1px solid var(--border); border-radius: var(--radius); }
.input:focus { outline: none; border-color: var(--primary); }
.container { max-width: 480px; margin: 0 auto; padding: 1rem; }
.stack > * + * { margin-top: 1rem; }
.empty-state { text-align: center; padding: 3rem; color: var(--text-muted); }
.error-msg { color: var(--error); font-size: 0.875rem; }
Validation Checklist
Before delivering, verify:
- All screens from spec implemented
- Primary flow completable end-to-end
- Empty/error/loading states shown
- Navigation works correctly
- Interactive elements have feedback
- Responsive on mobile viewport
Output
Save to /mnt/user-data/outputs/prototype.html (or descriptive name like prototype-onboarding.html).
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