Designing Layouts

What it does

When your agent uses it

• Structuring app layouts
• Building responsive designs
• Creating complex page structures

Example prompts

• “Use the designing-layouts skill to design layout systems and responsive interfaces including grid systems, flexbox patterns, sidebar layouts, and…”
• “/designing-layouts”

Requirements

• Node.js

Workflow steps

6 steps, taken from the step headings in SKILL.md.

1. 1Define Layout Requirements
2. 2Choose Layout Method
3. 3Implement with Design Tokens
4. 4Generate Configurations
5. 5Validate Accessibility
6. 6Test Responsiveness

What it can do on your machine

Read from SKILL.md and the folder at commit 76551b7. It shows what the files ask for, not the result of running them.

• Tool permissions

  Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

  From allowed-tools in the SKILL.md frontmatter.

• Runs code

  Ships 2 files in scripts/ (JavaScript, from the files we listed), which the agent can run.

  Shell commands in SKILL.md call:

  • node

  From the folder's file list and the shell code blocks in SKILL.md.

• Network

  No URLs in SKILL.md.

  From URLs in SKILL.md, links to its own repository left out.

• Credentials

  Names no API keys, tokens, secrets or passwords.

  From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Designing Layouts loads about 1.7k tokens when it runs, and up to ~18k if it reads all its reference files. Until then it costs about 63 tokens; SKILL.md has 392 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~63

When it runs · the whole SKILL.md, loaded when a task matches

~1.7k

With references · SKILL.md plus every file in references/, read only if the agent opens them

~18k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); the scripts in this folder are not scanned.

SKILL.md

The full file from ancoleman/ai-design-components at commit 76551b7, republished under its MIT licence (© ancoleman). 392 words, ~1,742 tokens.

name

designing-layouts

description

Designs layout systems and responsive interfaces including grid systems, flexbox patterns, sidebar layouts, and responsive breakpoints. Use when structuring app layouts, building responsive designs, or creating complex page structures.

.grid-container {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--grid-gap);
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding-x);
}

.col-span-6 { grid-column: span 6; }
.col-span-4 { grid-column: span 4; }
.col-span-3 { grid-column: span 3; }

.auto-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(280px, 100%), 1fr));
  gap: var(--grid-gap);
}

.holy-grail {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.holy-grail__body {
  flex: 1;
  display: flex;
}

.holy-grail__nav {
  width: var(--sidebar-width);
  flex-shrink: 0;
}

.holy-grail__main {
  flex: 1;
  min-width: 0; /* Prevent overflow */
}

.holy-grail__aside {
  width: var(--sidebar-width);
  flex-shrink: 0;
}

.card-container {
  container-type: inline-size;
  container-name: card;
}

@container card (min-width: 400px) {
  .card {
    grid-template-columns: auto 1fr;
    gap: var(--spacing-lg);
  }
}

@container card (min-width: 600px) {
  .card {
    grid-template-columns: 200px 1fr auto;
  }
}

/* Mobile-first breakpoints using design tokens */
@media (min-width: 640px) {  /* sm: Tablet portrait */
  .container { max-width: 640px; }
}

@media (min-width: 768px) {  /* md: Tablet landscape */
  .container { max-width: 768px; }
}

@media (min-width: 1024px) { /* lg: Desktop */
  .container { max-width: 1024px; }
}

@media (min-width: 1280px) { /* xl: Wide desktop */
  .container { max-width: 1280px; }
}

@media (min-width: 1536px) { /* 2xl: Ultra-wide */
  .container { max-width: 1536px; }
}

/* Base unit: 4px or 8px */
:root {
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
  --spacing-3xl: 64px;
}

/* Apply systematically */
.section { padding: var(--section-spacing) 0; }
.container { padding: 0 var(--container-padding-x); }
.card { padding: var(--spacing-lg); }
.stack > * + * { margin-top: var(--spacing-md); }

// tailwind.config.js
module.exports = {
  theme: {
    extend: {
      spacing: {
        'xs': 'var(--spacing-xs)',
        'sm': 'var(--spacing-sm)',
        'md': 'var(--spacing-md)',
        'lg': 'var(--spacing-lg)',
        'xl': 'var(--spacing-xl)',
      },
      screens: {
        'sm': '640px',
        'md': '768px',
        'lg': '1024px',
        'xl': '1280px',
        '2xl': '1536px',
      }
    }
  }
}

node scripts/generate_breakpoints.js --approach mobile-first

node scripts/calculate_fluid_typography.js --min-vw 320 --max-vw 1920

node scripts/validate_layout_accessibility.js path/to/component.tsx

© ancoleman, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 17 other files (scripts, references, assets) in skills/designing-layouts of ancoleman/ai-design-components.

• SKILL.md
• assets/breakpoint-config.json
• assets/layout-templates.json
• assets/spacing-scale.json
• examples/admin-layout.tsx
• examples/masonry-layout.tsx
• examples/responsive-grid.tsx
• examples/split-pane.tsx
• outputs.yaml
• references/accessibility-layouts.md
• references/css-techniques.md
• references/layout-patterns.md
• references/library-guide.md
• references/performance-optimization.md
• references/responsive-strategies.md
• scripts/calculate_fluid_typography.js
• scripts/generate_breakpoints.js
• … and 1 more

Open the folder on GitHubat commit 76551b7