Theming Components

What it does

When your agent uses it

• Theming components
• Implementing light/dark mode
• Creating brand styles
• Customizing visual design

Example prompts

• “Use the theming-components skill to provide design token system and theming framework for consistent, customizable UI styling across all components”
• “/theming-components”

Requirements

• Python 3
• Node.js

Workflow steps

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

1. 1Color Tokens
2. 2Spacing Tokens
3. 3Typography Tokens
4. 4Border & Radius Tokens
5. 5Shadow Tokens
6. 6Motion Tokens
7. 7Z-Index Tokens

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

  Shell commands in SKILL.md call:

  • python
  • npm

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

• Network

  No URLs in SKILL.md. Its commands use npm, which can reach the network depending on how they are called.

  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

Theming Components loads about 2.3k tokens when it runs, and up to ~15k if it reads all its reference files. Until then it costs about 161 tokens; SKILL.md has 424 words of instructions outside code blocks.

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

~161

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

~2.3k

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

~15k

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). 424 words, ~2,292 tokens.

name

theming-components

description

Provides design token system and theming framework for consistent, customizable UI styling across all components. Covers complete token taxonomy (color, typography, spacing, shadows, borders, motion, z-index), theme switching (CSS custom properties, theme providers), RTL/i18n support (CSS logical properties), and accessibility (WCAG contrast, high contrast themes, reduced motion). This is the foundational styling layer referenced by ALL component skills. Use when theming components, implementing light/dark mode, creating brand styles, customizing visual design, ensuring design consistency, or supporting RTL languages.

Component Skills (Behavior + Structure) → Use tokens for ALL visual styling
Design Tokens (Styling Variables)       → Define colors, spacing, typography
Theme Files (Token Overrides)           → Light, dark, brand-specific values

.button {
  background-color: var(--button-bg-primary);
  color: var(--button-text-primary);
  padding-inline: var(--button-padding-inline);
  padding-block: var(--button-padding-block);
  border-radius: var(--button-border-radius);
  transition: var(--transition-fast);
}

<!-- Light theme -->
<html data-theme="light">
  <button class="button">Primary Button</button>
</html>

<!-- Dark theme (same component, different appearance) -->
<html data-theme="dark">
  <button class="button">Primary Button</button>
</html>

function setTheme(themeName) {
  document.documentElement.setAttribute('data-theme', themeName);
  localStorage.setItem('theme', themeName);
}

function toggleTheme() {
  const current = document.documentElement.getAttribute('data-theme');
  setTheme(current === 'dark' ? 'light' : 'dark');
}

// Load saved theme on page load
setTheme(localStorage.getItem('theme') || 'light');

/* Primitive (9-shade scales) */
--color-blue-500: #3B82F6;

/* Semantic (purpose-based) */
--color-primary: var(--color-blue-500);
--color-success: var(--color-green-500);
--color-error: var(--color-red-500);

/* Component-specific */
--button-bg-primary: var(--color-primary);

--space-1: 4px;   --space-2: 8px;   --space-4: 16px;
--space-6: 24px;  --space-8: 32px;  --space-12: 48px;

/* Semantic */
--spacing-sm: var(--space-2);   /* 8px */
--spacing-md: var(--space-4);   /* 16px */
--spacing-lg: var(--space-6);   /* 24px */

--font-sans: 'Inter', -apple-system, sans-serif;
--font-mono: 'Fira Code', monospace;

--font-size-sm: 14px;
--font-size-base: 16px;
--font-size-lg: 18px;

--font-weight-normal: 400;
--font-weight-semibold: 600;
--font-weight-bold: 700;

--border-width-thin: 1px;
--border-width-medium: 2px;

--radius-sm: 4px;
--radius-md: 8px;
--radius-lg: 12px;
--radius-full: 9999px;

--shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.07);
--shadow-md: 0 4px 8px rgba(0, 0, 0, 0.1);
--shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.12);

--shadow-focus-primary: 0 0 0 3px rgba(59, 130, 246, 0.3);

--duration-fast: 150ms;
--duration-normal: 200ms;

--ease-out: cubic-bezier(0, 0, 0.2, 1);
--transition-fast: all var(--duration-fast) var(--ease-out);

@media (prefers-reduced-motion: reduce) {
  :root { --transition-fast: none; }
}

--z-dropdown: 1000;
--z-modal-backdrop: 1040;
--z-modal: 1050;
--z-tooltip: 1070;

/* themes/light.css */
:root {
  --color-primary: #3B82F6;
  --color-background: #FFFFFF;
  --color-text-primary: #1F2937;
}

/* themes/dark.css */
:root[data-theme="dark"] {
  --color-primary: #60A5FA;
  --color-background: #111827;
  --color-text-primary: #F9FAFB;
}

:root[data-theme="my-brand"] {
  --color-primary: #FF6B35;
  --font-sans: 'Poppins', sans-serif;
  --radius-md: 12px;
}

/* Correct - auto-flips in RTL */
.button {
  padding-inline: var(--button-padding-inline);
  margin-inline-start: var(--spacing-sm);
}

--{component}-{property}-{variant?}-{state?}

--button-bg-primary
--button-bg-primary-hover
--input-border-color-focus
--chart-color-1

.button {
  background-color: var(--button-bg-primary);
  border-radius: var(--button-border-radius);
}

:root[data-theme="high-contrast"] {
  --color-primary: #0000FF;
  --color-text-primary: #000000;
  /* 7:1 contrast (WCAG AAA) */
}

@media (prefers-reduced-motion: reduce) {
  :root {
    --duration-fast: 0ms;
    --transition-fast: none;
  }
}

JSON Tokens → Style Dictionary → CSS Variables
                               → iOS Swift
                               → Android XML
                               → JavaScript

npm run build-tokens

{
  "color": {
    "primary": {
      "$value": "#3B82F6",
      "$type": "color"
    }
  }
}

# Generate color scale from base color
python scripts/generate_color_scale.py --base "#3B82F6"

# Validate token structure
python scripts/validate_tokens.py

# Check WCAG contrast ratios
python scripts/validate_contrast.py

# Build all platforms
npm run build-tokens

© 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 42 other files (scripts, references) in skills/theming-components of ancoleman/ai-design-components.

• SKILL.md
• README.md
• SKILL_CHAINING_ARCHITECTURE.md
• config.js
• examples/ThemeProvider.tsx
• examples/ThemeToggle.tsx
• examples/TokenUsageExample.tsx
• examples/theme-switcher.html
• outputs.yaml
• package.json
• references/accessibility-tokens.md
• references/color-system.md
• references/component-integration.md
• references/logical-properties.md
• references/spacing-system.md
• references/style-dictionary-setup.md
• references/theme-switching.md
• references/typography-system.md
• scripts
• … and 24 more

Open the folder on GitHubat commit 76551b7