nutlope

Hallmark is an installable skill for Claude Code, Cursor, and Codex that encodes an anti-slop ruleset against common AI-generated design tells — purple gradients, single-font pages, centered layouts, generic icon cards — running 57 slop-test gates before returning generated UI. It provides four verbs: build new pages from a brief, audit existing code against the anti-pattern catalogue, redesign a page's structure while keeping content, and study a reference design to extract a portable DNA spec.