A component library and visual token system that makes your product consistent at scale. Figma component library with all interface components defined and variants documented. Design token definitions: colour scales with semantic names (--color-surface-primary, --color-text-dim, --color-border-subtle rather than raw hex values), typography scale with modular scale ratios (Major Third: 1.25 or Perfect Fourth: 1.333), spacing scale on a 4px base grid with named sizes, border radii, shadow levels, and z-index layers. Each token is named for its role, not its value, so a brand colour rebrand propagates to every component that uses the semantic token rather than requiring a search-and-replace across the codebase.
Component usage guidelines for designers and developers: what each component is for, when to use it, when not to use it, and the variants available. React or Vue component library aligned to the Figma system so design and code share the same component language, developers reference the same component names from the design file. Storybook documentation for developer reference: every component rendered in isolation with its variants, a code snippet showing the API, and visual regression tests that run on every PR to catch unintended visual changes. Style Dictionary build step exports tokens as CSS custom properties, Tailwind config, and JavaScript constants simultaneously, eliminating the "Figma says 16px but the code has 14px" class of discrepancy. The foundation that lets your team build new features at pace without the interface becoming inconsistent as it grows.