Antfu Design Agent Skill

Use this when building interfaces with UnoCSS in any framework (React, Vue, Svelte, Solid, or plain HTML), from dense devtools panels to landing pages. Read core-design-read first to set the direction, then apply the token system plus the polish and anti-slop rules.

Core Rules

• Use semantic shortcuts (bg-base, border-base, color-active, btn-action) instead of raw utility chains in markup.
• Design light and dark mode together. Core tokens must work in both themes.
• Name z-index layers (z-top-nav, z-panel-content, z-drawer-content). Do not use raw z values in templates.
• Generate class-based utilities only (class="..."). Avoid Attributify syntax in generated code.
• Keep icon/status class strings literal so UnoCSS can statically extract them (// @unocss-include when needed).
• Use font-mono + tabular-nums for technical values (paths, SHAs, counters, timestamps, percentages).
• For long paths and IDs, truncate visually but keep the full value in title.
• Read the brief and set the three dials before choosing a look (core-design-read).
• Borders for dense or structural surfaces, layered shadows for elevated ones (features-micro-interactions).
• Zero em-dash and en-dash characters in any user-facing text (best-practices-anti-slop).

Starter shortcuts

A minimal semantic core. See core-starter-kit for the full uno.config.ts and base styles.

shortcuts: [
  {
    'color-base': 'color-neutral-800 dark:color-neutral-200',
    'bg-base': 'bg-white dark:bg-#111',
    'bg-secondary': 'bg-#eee dark:bg-#222',
    'border-base': 'border-#8882',

    'bg-active': 'bg-#8881',
    'color-active': 'color-primary-600 dark:color-primary-300',
    'border-active': 'border-primary-600/25 dark:border-primary-400/25',

    'btn-action': 'inline-flex items-center gap-2 rounded border border-base px2 py1 op75 hover:op100 hover:bg-active disabled:pointer-events-none disabled:op30!',
    'op-fade': 'op65 dark:op55',
    'op-mute': 'op30 dark:op25',

    'z-top-nav': 'z-60',
    'z-panel-content': 'z-70',
    'z-drawer-content': 'z-100',
  },
]

Core References

| Topic | Description | Reference |

|-------|-------------|-----------|

| Core Principles | Semantic tokens, dark mode parity, z-index naming, class-first output | core-principles |

| Starter Kit | Copy-paste UnoCSS starter config and base light/dark styles | core-starter-kit |

| Tokens and Combos | Token families, reusable class combinations, mobile-safe shell tokens | core-tokens-and-combinations |

| Design Read and Dials | Read the brief, declare a design read, set variance/motion/density dials | core-design-read |

Best Practices

| Topic | Description | Reference |

|-------|-------------|-----------|

| Strict Rules and Pre-Flight | Do/don't checklist and the consolidated pre-flight | best-practices-strict-rules |

| Class over Attributify | Why generated code uses class utilities, with conversions | best-practices-class-utilities-over-attributify |

| Anti-Slop Hygiene | The dash ban and the AI-tell forbidden patterns | best-practices-anti-slop |

| Bias Correction | Typography, color, layout, and materiality defaults to override | best-practices-bias-correction |

Features

| Topic | Description | Reference |

|-------|-------------|-----------|

| Data Presentation | Paths, icons, time, date, numbers, badges, buttons | features-data-presentation |

| Micro-Interactions | Radius, alignment, shadows, animation, numbers, outlines, hit areas | features-micro-interactions |

| Floating Vue Overrides | Shared Floating Vue setup and popper styling | features-floating-vue-overrides |

Advanced

| Topic | Description | Reference |

|-------|-------------|-----------|

| Pattern Vocabulary | Named UI patterns to recognize and reach for | advanced-pattern-vocabulary |

| Redesign Protocol | Detect mode, audit first, preserve IA and SEO | advanced-redesign-protocol |

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Source references:

• https://github.com/antfu/node-modules-inspector
• https://github.com/vitejs/devtools/tree/main/packages/rolldown
• https://github.com/eslint/config-inspector
• https://github.com/antfu/vite-plugin-inspect
• https://github.com/antfu/agent-container
• https://github.com/Leonxlnx/taste-skill
• https://github.com/jakubkrehel/make-interfaces-feel-better

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