A design system is not a component library. It is a shared language between designers and engineers — a living document that grows with your product.

The most common mistake teams make when building a design system is starting with components. Start instead with design tokens: the smallest named values that define your visual language — colours, typography scales, spacing, radius, and shadow.

Once tokens are established, build your component architecture bottom-up. Atoms compose into molecules, which compose into organisms. This atomic approach ensures that every component traces back to your token system.

Documentation is what separates a personal project from a scalable system. Each component should document its intent, usage guidelines, accessibility requirements, and code implementation.

Version control for design systems deserves as much attention as code versioning. Treat breaking changes with the same gravity as a semver major bump.

The measure of a good design system is not the number of components it has — it is how quickly a new designer can produce production-quality work without asking anyone for help.