Building Design Systems That Scale

Why Design Systems Matter

A design system is more than a component library. It's a shared language between designers and developers that ensures consistency, accelerates development, and reduces decision fatigue.

After building Vault UI and maintaining it across three production applications, here are the key lessons I've learned.

Start With Constraints

The biggest mistake teams make is starting too broad. Begin with a tight color palette, a type scale, and spacing tokens. Everything else can be derived from these primitives.

const tokens = {
  colors: {
    primary: '#BE0B22',
    surface: '#161616',
    text: '#F5F0EB',
  },
  spacing: [0, 4, 8, 16, 24, 32, 48, 64],
  radii: [0, 4, 8, 16],
};

Compound Components Over Props

Rather than building mega-components with dozens of props, use the compound component pattern. This gives consumers maximum flexibility while maintaining internal consistency.

Accessibility Is Not Optional

Every component should be keyboard navigable and screen reader friendly from day one. Retrofitting accessibility is exponentially harder than building it in.

Document Everything

If it's not in Storybook with interactive examples, it doesn't exist. Good documentation is the difference between a component library that gets adopted and one that gets abandoned.