Hallmark

Hallmark is a design skill for AI coding assistants that encodes a single ruleset for typography, colour, layout, motion, interaction and voice, aimed at pages that do not look AI-generated. It names the common tells, such as the purple-gradient hero, Inter as a display face, centred everything and icon-tile feature cards, picks a page macrostructure before theming, and refuses to repeat its last three. Beyond building, it can study a reference into a portable design.md, audit a page or redesign one.