Signs it’s time
Several screens reinvent the same button, two teams work on the product, a second app is on the way: the need for shared rules becomes real.
Start small
Colours, typography, buttons, form fields: a dozen well-defined components cover the essentials. The rest will come with use.
Share it with developers
A design system lives in the code as much as in the mock-ups. See our approach to interface design and the article accessibility: five checks.