Hallmark
Anti-AI-slop design skill with 48 themes and a build-time browser lint
About
Hallmark (32,518 stars, MIT, by Nutlope / Hassan El Mghari with Together AI) is an anti-AI-slop design skill for Claude Code, Codex, Cursor and OpenCode: 48 themes, a build-time browser lint (sloplint --render) against AI tells, tiered gates (Floor never ships, Reflex overrulable with a reason, Finish), a fresh-context reviewer, /hallmark redesign <path> and /hallmark audit <path>, and 755 openly licensed (Wikimedia) photos credited on-page.
Install as a skill (Node 18+), then install the browser-check deps (npm i -g puppeteer-core plus Chrome) if you want sloplint renders.
npx skills add nutlope/hallmark -gOr as a plugin in your agent:
/plugin marketplace add nutlope/hallmark
/plugin install hallmark@hallmarkCopy individual commands
/plugin marketplace add nutlope/hallmark/plugin install hallmark@hallmark
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