A named, numbered design system rather than a loose set of preferences: exactly three visual layers per screen (primary/secondary/tertiary, each locked to a specific type role), a font budget (two families max, three sizes max, two weights max, treated as a spending limit, not a suggestion), and Nothing’s actual visual signature — OLED-black dark mode, warm off-white light mode, dot-matrix Doto for hero moments, monochrome as the default canvas with color reserved for status.
The “three-layer rule” squint test is the sharpest single idea in it: if two elements still compete for attention after squinting at the screen, one has to shrink, fade, or move. That’s a genuinely testable design principle, not just taste dressed up as one.
Install: git clone the repo, then copy the nothing-design/ folder into ~/.claude/skills/ — no plugin manifest, manual copy only.
Gotcha: it’s explicitly narrow by design — the frontmatter tells the model to “NEVER trigger automatically for generic UI or design tasks,” only when someone explicitly asks for “Nothing style.” Don’t expect it to volunteer opinions on a brief that isn’t asking for this specific aesthetic.