Claude, Cursor, v0, they'll all

Claude, Cursor, v0, they'll all default to the same grey SaaS look unless you give them something better to work from.

Before building Superbrain, a voice-first journaling tool, I wrote the entire design system in a single Markdown file. Colours, type, components, atmosphere, right down to how the interface shifts with context. Every AI tool reads that design.md before generating a single screen.

The result was screens landing on brand the first time, across every surface. No endless rounds of nudging the output back towards something that feels like the brand.

A design system used to be documentation you wrote after the work. Now it's the brief the AI builds from. One file, and suddenly the machines have taste.