What Is a Design System? Design Tokens (DTCG 2025.10), Component Libraries and Documentation
A design system is made of tokens, components, usage rules and governance, and tokens split into primitive, semantic and component layers. We move Bookstore's hand-written tokens.css into DTCG 2025.10 JSON files and a resolver for light/dark and reduced motion, generate CSS and Tailwind output with Terrazzo, and measure that 100 of 101 variables resolve exactly the same in Chromium.
14 Nov 2026
·
14 min
·
12
