unocss

Generate atomic CSS utilities on demand via UnoCSS presets and configuration.

95|3|Updated Jan 30, 2026

Search Tags:#theming #utility-first #variants #atomic #UnoCSS #CSS presets

Ready to run

npx skills add https://github.com/uni-helper/skills --skill unocss

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: unocss
Source: https://github.com/uni-helper/skills/tree/main/skills/unocss
Command: npx skills add https://github.com/uni-helper/skills --skill unocss

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

UnoCSS solves the tedium of writing and maintaining large CSS by generating atomic utility classes on demand, enabling scalable styling with fewer lines of CSS.

Core Features & Use Cases

Atomic utilities powered by presets and variants for flexible design.
Theming, responsive breakpoints, and design tokens support for scalable UI.
Works across modern frameworks and build tools, speeding up prototyping and UI consistency.

Quick Start

Install UnoCSS in your project, create a configuration file (uno.config.ts/js) with at least a preset (e.g., presetWind3), then start using utilities in your templates. For example, apply basic utilities like text, margin, and padding to components.

Frequently Asked Questions about unocss

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

FAQPage Schema

How does generating atomic CSS utilities on demand streamline frontend styling?▼

Generating atomic CSS utilities on demand streamlines frontend styling by creating only the classes your project uses, reducing CSS file size and eliminating the need to maintain large, manual stylesheets for scalable UI development.

Can I use UnoCSS for theming and responsive breakpoints across modern frameworks?▼

Yes, you can use UnoCSS for theming and responsive breakpoints across modern frameworks and build tools. It supports design tokens and variants, enabling consistent and scalable UI design systems throughout your frontend project.

What is the best way to set up atomic CSS in a frontend project?▼

The best way to set up atomic CSS is to install UnoCSS via npm, create a configuration file like uno.config.ts with a preset such as presetWind3, and then directly apply utility classes for text, margin, and padding in your templates.

Do I need an npm installation and configuration file to run atomic CSS generation?▼

Yes, you need an npm installation and a configuration file (uno.config.ts or js) to run atomic CSS generation. This config file must include at least one preset to define the utility classes available in your project.

Why use atomic CSS utilities instead of writing custom CSS for design systems?▼

You use atomic CSS utilities instead of writing custom CSS to solve the tedium of maintaining large stylesheets. This approach enables scalable styling with fewer lines of CSS and speeds up UI prototyping and consistency.