Single-file HTML references for marketing pages and iOS apps. Hand the GitHub link to Claude Code and it'll design Stripe-mesh heroes, Linear-dark surfaces, Spotify Now-Playing screens — without guessing.
Stripe's mesh isn't a generic blue gradient. Linear's canvas isn't 'dark mode'. We extracted the exact tokens, so Claude doesn't have to guess.
Negative letter-spacing where the brand calls for it (Linear -3px). Tabular figures where money is shown (Coinbase, Robinhood). The font ladder is the brand.
Spotify's 9999px pill buttons. Notion's pastel cards. Duolingo's 3D chunky shadows. WhatsApp's 0px sender-corner bubble. Non-negotiable identifiers.
No commands, no syntax, no slash-prefix. The skill auto-loads when you mention a brand name. Claude reads the matching reference file, pulls the actual tokens, and applies them — automatically.