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mockup-sandbox

Run a Vite dev server for live UI component previews on the canvas.

Updated Jun 30, 2026
Search Tags:#responsive design#prototyping#canvas#web UI#component preview
One-click install
npx skills add https://github.com/not-subhu/screech --skill mockup-sandbox-not-subhu
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: mockup-sandbox
Source: https://github.com/not-subhu/screech/tree/main/.local/skills/mockup-sandbox
Command: npx skills add https://github.com/not-subhu/screech --skill mockup-sandbox-not-subhu

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill requires vite, tailwindcss, shadcn/ui, and includes scripts (resource) and references (resource) and assets (resource) components.

What problem does it solve?

The mockup-sandbox Skill solves the problem of creating, previewing, and iterating on web UI content on the canvas with live rendered components. It allows users to design or prototype components on the canvas, compare design variants side-by-side, and show responsive previews.

Core Features & Use Cases

  • Live Component Preview: Render web UI components on the canvas for real-time design and prototyping.
  • Responsive Previews: Show how components look on different devices and screen sizes.
  • Component States: Preview component states such as loading, error, and empty.
  • Dark vs Light Mode: Compare design themes.
  • Variant Exploration: Explore multiple design alternatives with subagent orchestration.

Quick Start

Activate the mockup-sandbox skill and create your web UI components on the canvas.

Frequently Asked Questions about mockup-sandbox

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I preview web UI components live during prototyping?▼

To preview web UI components live during prototyping, this Skill provides a vite dev server to render and iterate on canvas elements in real time. This allows direct visualization of component states and styling adjustments as you design.

Does this sandbox support responsive design testing and dark mode?▼

Yes, responsive design testing and dark mode are supported. You can preview how web UI components appear across different screen sizes and directly compare light versus dark themes side-by-side on the canvas.

What dependencies do I need to render shadcn/ui components in this environment?▼

You need vite, Tailwind CSS, and shadcn/ui installed to render components in this environment. These dependencies handle the live dev server functionality, utility-first styling, and pre-built component rendering required for prototyping.

Can I preview component states like loading and error directly on the canvas?▼

Yes, you can preview component states like loading, error, and empty directly on the canvas. The sandbox renders these specific states so you can validate UI behavior and visual feedback without deploying the application.

What is the best way to compare multiple web UI design variants?▼

The best way to compare multiple web UI design variants is using subagent orchestration to explore design alternatives. This allows you to render and evaluate different component layouts side-by-side on the canvas for iterative prototyping.

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