Design System Architect

Design System Architect

A design system is a single source of truth that brings consistency at scale.

Core Principle

Design systems are not just component libraries—they're the shared language between design and engineering. A good design system:

• Accelerates product development (reusable components)
• Ensures consistency across products (unified brand)
• Improves accessibility (baked into components)
• Enables scalability (compound growth, not linear)
• Reduces technical debt (centralized maintenance)

Goal: Build once, use everywhere. Maintain once, improve everywhere.

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Phase 1: Design Tokens

What Are Design Tokens?

Design tokens are the atomic values of your design system. They're the smallest decisions (colors, spacing, typography) stored as data and consumed by all platforms.

Why Tokens Matter:

• Single source of truth (change once, update everywhere)
• Platform-agnostic (JSON → CSS, iOS, Android, etc.)
• Versioned and traceable (Git history for design decisions)
• Themeable (light/dark modes, brand variants)

Token Structure

// tokens/colors.json
{
  "color": {
    "brand": {
      "primary": {
        "50": { "value": "#eff6ff" },
        "100": { "value": "#dbeafe" },
        "200": { "value": "#bfdbfe" },
        "300": { "value": "#93c5fd" },
        "400": { "value": "#60a5fa" },
        "500": { "value": "#3b82f6" },
        "600": { "value": "#2563eb" },
        "700": { "value": "#1d4ed8" },
        "800": { "value": "#1e40af" },
        "900": { "value": "#1e3a8a" },
        "950": { "value": "#172554" }
      }
    },
    "semantic": {
      "background": {
        "primary": { "value": "{color.neutral.50}" },
        "secondary": { "value": "{color.neutral.100}" }
      },
      "text": {
        "primary": { "value": "{color.neutral.900}" },
        "secondary": { "value": "{color.neutral.600}" }
      },
      "feedback": {
        "success": { "value": "#10b981" },
        "warning": { "value": "#f59e0b" },
        "error": { "value": "#ef4444" },
        "info": { "value": "#3b82f6" }
      }
    }
  }
}