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apply-design-system

Design
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Apply design tokens and system patterns correctly. Reference for semantic colors, spacing, typography, borders, and shadows. Never use arbitrary values.

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How to use this skill

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  1. Open your project in Codex.
  2. Copy the prompt below and paste it into your agent.
  3. Review the proposed files and risks before you approve installation.
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I want to install this Agent Skill for this project in Codex.

Source SKILL.md: https://github.com/majiayu000/claude-skill-registry/blob/HEAD/skills/design/apply-design-system/SKILL.md

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First, summarize what it does, its dependencies, license status if identifiable, and any risks. Show the exact files you propose to add under .agents/skills/apply-design-system/. Do not write files or run scripts until I approve.

After I approve, install the complete skill folder, including required referenced files, into that project location. Verify it is discoverable, then tell me its actual invocation name and how to use it. Do not claim it is installed until you have verified it.

Copying this prompt does not install or run the skill. Review third-party files before use. Codex skill guide

Apply Design System

Use design tokens exclusively. Never use arbitrary values ([#hex], [16px], etc.).

Color Tokens

Backgrounds

bg-background, bg-card, bg-popover, bg-primary, bg-secondary, bg-muted, bg-accent, bg-destructive

Text

text-foreground, text-muted-foreground, text-primary-foreground, text-secondary-foreground, text-accent-foreground, text-destructive-foreground

Borders

border (default), border-input, border-ring

Spacing (Padding/Margin/Gap)

0, 1, 2, 4, 6, 8, 12, 16, 20, 24 — e.g., p-4, gap-6, space-y-4

Typography

  • Sizes: text-xs, text-sm, text-base, text-lg, text-xl, text-2xl, text-3xl, text-4xl
  • Weights: font-normal, font-medium, font-semibold, font-bold
  • Families: font-sans, font-heading, font-mono

Borders & Radius

rounded-sm, rounded, rounded-md, rounded-lg, rounded-xl, rounded-full

Shadows

shadow-sm, shadow, shadow-md, shadow-lg, shadow-xl

Common Patterns

Card: bg-card text-card-foreground rounded-lg border shadow-sm p-6

Primary button: bg-primary text-primary-foreground hover:bg-primary/90 px-4 py-2 rounded-md font-medium

Input: flex h-10 w-full rounded-md border border-input bg-background px-3 py-2 text-sm

Container: container mx-auto px-4 py-8

Using cn() for class merging

import { cn } from '@acme/design-system/utils/style'

<div className={cn('base-styles', { 'conditional': variant === 'x' }, className)}>

Responsive (mobile-first)

md: (768px+), lg: (1024px+), xl: (1280px+)

Anti-Patterns

  • bg-[#FF0000] — use semantic tokens
  • bg-red-500 — use semantic tokens
  • p-[16px] — use p-4
  • style={{ ... }} — use Tailwind classes
  • w-[250px] — use w-64 or similar

When Tokens Don't Exist

  1. Check for a close semantic token
  2. Add to design tokens package (packages/design-tokens/)
  3. Update Tailwind config
  4. Document in docs/typography-and-color.md