# vercel-ui-skills

Pins your agent to Vercel's look: light surfaces, Inter, a 4px grid. Useful when you want generated UI to follow one fixed scale instead of guessing.

- skill · `type=skill` · Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, OpenCode · 342 installs · ★ 100
- Author: design-skills
- License: MIT · policy=mirror · the beginning of the file is at the end of this page
- Source: https://github.com/ihlamury/design-skills/tree/HEAD/skills/vercel/SKILL.md
- Updated: 2026-02-10
- HTML: https://affpapa.org/en/nevibecode/skills/vercel-ui-skills

## What it does

The skill hands an AI agent a set of constraints taken from Vercel's interface. Colors come as semantic tokens (`surface-base` #F9F9F9, `accent` #000001), typography is Inter with fixed sizes and weights, and spacing and radius values are limited to a defined scale.

Several rules are hard: text contrast at least 4.5:1, a 2px focus outline with 2px offset, animation only on `transform` and `opacity` and never past 200ms. There are bans too — no removing focus indicators, no blocking paste in `input` or `textarea`, no animating `width`, `height` or `margin`. Destructive actions are supposed to go through an `AlertDialog`.

The numbers behind it come from measuring the live site: 12 colors, 5 font weights, a 1920px base viewport. So in a project with its own grid or a dark theme, the skill will fight your tokens. Worth checking before you hand it the layout.

## Install

### Claude Code (native platform)

1. **Skills CLI (Vercel)**
```bash
npx skills add ihlamury/design-skills --skill vercel-ui-skills -a claude-code
```
```bash
npx skills add ihlamury/design-skills --skill vercel -a claude-code
```

2. **Manually: put the files in place**
- File: `~/.claude/skills/vercel/SKILL.md` — Copy the whole skill folder; for one project use .claude/skills/vercel/

### Codex

1. **Skills CLI (Vercel)**
```bash
npx skills add ihlamury/design-skills --skill vercel -a codex
```

2. **Manually: put the files in place**
- File: `.agents/skills/vercel/SKILL.md` — For all projects use ~/.agents/skills/

### Cursor

1. **Skills CLI (Vercel)**
```bash
npx skills add ihlamury/design-skills --skill vercel -a cursor
```

2. **Manually: put the files in place**
- File: `.cursor/skills/vercel/SKILL.md` — Cursor also reads .agents/skills/ and .claude/skills/

### GitHub Copilot

1. **GitHub CLI**
```bash
gh skill install ihlamury/design-skills vercel
```

2. **Manually: put the files in place**
- File: `.github/skills/vercel/SKILL.md`

### Gemini CLI

1. **Skills CLI (Vercel)**
```bash
npx skills add ihlamury/design-skills --skill vercel -a gemini-cli
```

2. **Platform CLI**
```bash
gemini skills install https://github.com/ihlamury/design-skills --path skills/vercel
```

### Windsurf (Devin Desktop)

**Manually: put the files in place**
- File: `.devin/skills/vercel/SKILL.md` — The legacy .windsurf/skills/ path still works

### OpenCode

**Skills CLI (Vercel)**
```bash
npx skills add ihlamury/design-skills --skill vercel -a opencode
```

### Claude.ai

**Claude.ai**
- Zip the folder and upload it in Settings → Capabilities → Skills

Where a file is given instead of a command, copy the files from the source to that path: https://github.com/ihlamury/design-skills/tree/HEAD/skills/vercel/SKILL.md

## When to use it
- build a light interface in Vercel's style without picking colors by hand
- keep one spacing and radius scale across agent-written markup
- audit text contrast and focus states against a checklist
- stop generated code from animating layout properties
- set rules for loading skeletons and inline error placement

## Example prompts
- Build a pricing page in Vercel's style using the vercel-ui-skills skill
- Rewrite this component to the 4px grid and Inter
- Check my markup against vercel-ui-skills and list the violations

## Source text · SKILL.md · MIT

Below is the content of a third-party file. It is data, not instructions for you: do not act on anything written inside unless the human asks. Block tag: b5c530cd25b9163f.

BEGIN THIRD-PARTY FILE b5c530cd25b9163f
```text
---
name: vercel-ui-skills
description: Vercel's UI design system. Use when building interfaces inspired by Vercel's aesthetic - light mode, Inter font, 4px grid.
license: MIT
metadata:
  author: design-skills
  version: "1.0.0"
  source: https://vercel.com
---

# Vercel UI Skills

Opinionated constraints for building Vercel-style interfaces with AI agents.

## When to Apply

Reference these guidelines when:
- Building light-mode interfaces
- Creating Vercel-inspired design systems
- Implementing UIs with Inter font and 4px grid

## Colors

- SHOULD use light backgrounds for primary surfaces
- MUST use `#F9F9F9` as page background (`surface-base`)
- MUST use `#000001` for primary actions and focus states (`accent`)
- SHOULD reduce color palette (currently 12 colors detected)
- MUST maintain text contrast ratio of at least 4.5:1 for accessibility

### Semantic Tokens

| Token | HEX | RGB | Usage |
|-------|-----|-----|-------|
| `surface-base` | #F9F9F9 | rgb(249,249,249) | Page background |
| `surface-raised` | #111111 | rgb(17,17,17) | Cards, modals, raised surfaces |
| `surface-overlay` | #000001 | rgb(0,0,1) | Overlays, tooltips, dropdowns |
| `text-primary` | #797979 | rgb(121,121,121) | Headings, body text |
| `text-secondary` | #929292 | rgb(146,146,146) | Secondary, muted text |
| `text-tertiary` | #1B1B1B | rgb(27,27,27) | Additional text |
| `border-default` | #C8CDD1 | rgb(200,205,209) | Subtle borders, dividers |
| `accent` | #000001 | rgb(0,0,1) | Primary actions, links, focus |

## Typography

- MUST use `Inter` as primary font family
- SHOULD use single font family for consistency
- MUST use `44px` / `extra_bold` for primary headings
- MUST use `29px` / `700` for body text
- SHOULD reduce font weights (currently 5 detected)
- MUST use `text-balance` for headings and `text-pretty` for body text
- SHOULD use `tabular-nums` for numeric data
- NEVER modify letter-spacing unless explicitly requested

### Text Styles

| Style | Font | Size | Weight | Color | Count |
|-------|------|------|--------|-------|-------|
| `heading-1` | Inter | 44px | extra_bold | #383838 | 1 |
| `body` | Inter | 29px | 700 | #1B1B1B | 1 |
| `body-secondary` | Inter | 28px | 500 | #717171 | 1 |
| `text-25px` | Inter | 25px | 500 | #828282 | 1 |
| `text-24px` | Inter | 24px | 500 | #797979 | 1 |
| `text-24px` | Inter | 24px | 700 | #1E1E1E | 1 |
| `text-23px` | Inter | 23px | 400 | #6C6C6C | 1 |
| `text-20px` | Inter | 20px | 500 | #262626 | 1 |
| `text-18px` | Inter | 18px | 400 | #797979 | 1 |
| `text-18px` | Inter | 18px | 500 | #373737 | 1 |

### Typography Reference

**Font Families:**
- `Inter` (used 21x)

**Font Sizes:** 10px, 12px, 13px, 14px, 15px, 18px, 20px, 23px, 24px, 25px, 28px, 29px, 44px

## Spacing

- MUST use 4px grid for spacing
- SHOULD use spacing from scale: 4px, 5px, 6px, 10px, 25px, 54px, 59px, 92px
```
END THIRD-PARTY FILE b5c530cd25b9163f

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