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Design System Patterns

Foundational design system architecture — token hierarchies, theming infrastructure, token pipelines, and governance. Use when creating design tokens, implementing theme switching, setting up Style Dictionary, or establishing multi-brand theming. Triggers on design tokens, theme provider, Style Dictionary, token pipeline, multi-brand theming, CSS custom properties architecture.

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Foundational design system architecture — token hierarchies, theming infrastructure, token pipelines, and governance. Use when creating design tokens, implementing theme switching, setting up Style Dictionary, or establishing multi-brand theming. Triggers on design tokens, theme provider, Style Dictionary, token pipeline, multi-brand theming, CSS custom properties architecture.

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Tencent SkillHub
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README.md, SKILL.md, references/component-architecture.md, references/design-tokens.md, references/theming-architecture.md

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Tencent SkillHub
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1.0.0

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ClawHub primary doc Primary doc: SKILL.md 14 sections Open source page

Design System Patterns

Foundational architecture for scalable design systems: token hierarchies, theming infrastructure, token pipelines, and governance patterns.

When to Use

Defining token architecture (primitive → semantic → component layers) Implementing light/dark/system theme switching with React Setting up Style Dictionary or Figma-to-code token pipelines Building multi-brand theming systems Establishing token naming conventions and governance Preventing flash of unstyled content (FOUC) in SSR

Pattern 1: Token Hierarchy

Three-layer token architecture separates raw values from meaning from usage. /* Layer 1: Primitive tokens — raw values, never used directly in components */ :root { --color-blue-500: #3b82f6; --color-blue-600: #2563eb; --color-gray-50: #fafafa; --color-gray-900: #171717; --space-1: 0.25rem; --space-2: 0.5rem; --space-4: 1rem; --font-size-sm: 0.875rem; --font-size-base: 1rem; --radius-sm: 0.25rem; --radius-md: 0.5rem; } /* Layer 2: Semantic tokens — contextual meaning, theme-aware */ :root { --text-primary: var(--color-gray-900); --text-secondary: var(--color-gray-600); --surface-default: white; --surface-elevated: var(--color-gray-50); --border-default: var(--color-gray-200); --interactive-primary: var(--color-blue-500); --interactive-primary-hover: var(--color-blue-600); } /* Layer 3: Component tokens — specific usage, optional */ :root { --button-bg: var(--interactive-primary); --button-bg-hover: var(--interactive-primary-hover); --button-text: white; --button-radius: var(--radius-md); --button-padding-x: var(--space-4); --button-padding-y: var(--space-2); } Semantic tokens are the most important layer — they enable theming. Component tokens are optional and useful for complex component libraries.

Pattern 2: Theme Switching with React

Key capabilities: theme (user selection), resolvedTheme (actual light/dark), setTheme, system preference detection, localStorage persistence, DOM attribute application. type Theme = "light" | "dark" | "system"; export function ThemeProvider({ children, defaultTheme = "system", storageKey = "theme", attribute = "data-theme" }: { children: React.ReactNode; defaultTheme?: Theme; storageKey?: string; attribute?: "class" | "data-theme" }) { const [theme, setThemeState] = useState<Theme>(() => typeof window === "undefined" ? defaultTheme : (localStorage.getItem(storageKey) as Theme) || defaultTheme); const [resolvedTheme, setResolvedTheme] = useState<"light" | "dark">("light"); const getSystem = useCallback(() => matchMedia("(prefers-color-scheme: dark)").matches ? "dark" : "light" as const, []); const apply = useCallback((r: "light" | "dark") => { const root = document.documentElement; attribute === "class" ? (root.classList.remove("light", "dark"), root.classList.add(r)) : root.setAttribute(attribute, r); root.style.colorScheme = r; setResolvedTheme(r); }, [attribute]); useEffect(() => { apply(theme === "system" ? getSystem() : theme); }, [theme, apply, getSystem]); useEffect(() => { // Listen for system preference changes if (theme !== "system") return; const mq = matchMedia("(prefers-color-scheme: dark)"); const handler = () => apply(getSystem()); mq.addEventListener("change", handler); return () => mq.removeEventListener("change", handler); }, [theme, apply, getSystem]); const setTheme = useCallback((t: Theme) => { localStorage.setItem(storageKey, t); setThemeState(t); }, [storageKey]); return <ThemeContext.Provider value={{ theme, resolvedTheme, setTheme }}> {children} </ThemeContext.Provider>; } Full implementation with toggleTheme, disableTransitionOnChange, and testing patterns in references/theming-architecture.md.

Preventing FOUC in SSR (Next.js)

Inline script in <head> runs before paint: const themeScript = `(function(){ var t=localStorage.getItem('theme')||'system'; var d=t==='dark'||(t==='system'&&matchMedia('(prefers-color-scheme:dark)').matches); document.documentElement.setAttribute('data-theme',d?'dark':'light'); document.documentElement.style.colorScheme=d?'dark':'light'; })()`; // In layout.tsx <html lang="en" suppressHydrationWarning> <head> <script dangerouslySetInnerHTML={{ __html: themeScript }} /> </head> <body><ThemeProvider>{children}</ThemeProvider></body> </html>

Pattern 3: Multi-Brand Theming

Layer brand tokens on top of semantic tokens for white-label products: [data-brand="corporate"] { --brand-primary: #0066cc; --brand-primary-hover: #0052a3; --brand-font-heading: "Helvetica Neue", sans-serif; --brand-radius: 0.25rem; } [data-brand="startup"] { --brand-primary: #7c3aed; --brand-primary-hover: #6d28d9; --brand-font-heading: "Poppins", sans-serif; --brand-radius: 1rem; } /* Map brand tokens into semantic tokens */ :root { --interactive-primary: var(--brand-primary); --interactive-primary-hover: var(--brand-primary-hover); }

Pattern 4: Style Dictionary Pipeline

Multi-platform token generation from a single JSON source: // style-dictionary.config.js — generates CSS, iOS Swift, and Android XML module.exports = { source: ["tokens/**/*.json"], platforms: { css: { transformGroup: "css", buildPath: "dist/css/", files: [{ destination: "variables.css", format: "css/variables", options: { outputReferences: true } }], }, ios: { transformGroup: "ios-swift", buildPath: "dist/ios/", files: [{ destination: "DesignTokens.swift", format: "ios-swift/class.swift", className: "DesignTokens" }], }, android: { transformGroup: "android", buildPath: "dist/android/", files: [{ destination: "colors.xml", format: "android/colors", filter: { attributes: { category: "color" } } }], }, }, }; See references/design-tokens.md for token category definitions, custom transforms, and platform-specific output examples.

Pattern 5: Accessibility Tokens

@media (prefers-reduced-motion: reduce) { :root { --duration-fast: 0ms; --duration-normal: 0ms; --duration-slow: 0ms; } } @media (prefers-contrast: high) { :root { --text-primary: #000000; --surface-default: #ffffff; --border-default: #000000; --interactive-primary: #0000ee; } } @media (forced-colors: active) { .button { border: 2px solid currentColor; } .card { border: 1px solid CanvasText; } }

Token Naming Conventions

Format: [category]-[property]-[variant]-[state] (e.g. color-border-input-focus) kebab-case — text-primary not textPrimary Semantic names — danger not red State suffixes — -hover, -focus, -active, -disabled Scale indicators — spacing-4, font-size-lg

Token Governance

Change management: Propose → Review (design + eng) → Test (all platforms/themes) → Deprecate (with migration path) → Remove (after deprecation period). { "color.primary": { "value": "{color.primitive.blue.500}", "deprecated": true, "deprecatedMessage": "Use semantic.accent.default instead", "replacedBy": "semantic.accent.default" } }

Best Practices

Name tokens by purpose — semantic names, not visual descriptions Maintain the hierarchy — primitives → semantic → component Version tokens — treat token changes as API changes with semver Test all theme combinations — every theme must work with every component Automate the pipeline — CI/CD for Figma-to-code synchronization Provide migration paths — deprecate gradually with clear alternatives Validate contrast — automated WCAG AA/AAA checks on token pairs

Common Pitfalls

Token sprawl — too many tokens without clear hierarchy Inconsistent naming — mixing camelCase and kebab-case Hardcoded values — using raw hex/rem instead of token references Circular references — tokens referencing each other in loops Platform gaps — tokens defined for web but missing for mobile Missing dark mode — semantic tokens that don't adapt to themes

Related Skills

design-system-components — CVA variant patterns and Surface primitives distinctive-design-systems — Aesthetic documentation and visual identity theme-factory — Pre-built theme palettes for artifacts

References

references/design-tokens.md — Complete token category definitions references/theming-architecture.md — Detailed theming implementation references/component-architecture.md — Compound, polymorphic, and headless patterns

Category context

Agent frameworks, memory systems, reasoning layers, and model-native orchestration.

Source: Tencent SkillHub

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Package contents

Included in package
5 Docs
  • SKILL.md Primary doc
  • README.md Docs
  • references/component-architecture.md Docs
  • references/design-tokens.md Docs
  • references/theming-architecture.md Docs