Introduction

A design system is not a Figma file. It's a contract between designers and engineers that says: "we agreed on this once, so we don't have to argue about it again."

Layers of a Design System

1. Tokens

   • Color, spacing, typography, radii
   • Source of truth lives in code, not Figma

2. Primitives

   • Buttons, inputs, dialogs
   • Headless behavior + styled wrapper

3. Patterns

   • Forms, tables, empty states
   • Composed from primitives

When a Design System Is Worth It

Don't build one too early. Build one when you notice:

• The same component re-implemented in three places
• Pixel drift between similar screens
• New hires asking "which Button should I use?"

Tools That Actually Help

• shadcn/ui for headless, copy-paste primitives
• Tailwind CSS for token-driven styling
• Storybook when you need component-level documentation

Conclusion

The best design system is the one your team actually uses. Bias toward small, boring, predictable, and well-documented. The flashy stuff is a trap.

"Standards are like toothbrushes. Everyone agrees you need one, no one wants to use someone else's."