GitHub - Nutlope/hallmark: Anti-AI-slop design skill for Claude Code, Cursor, and Codex. · GitHub
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Hallmark
A design skill for Claude Code, Cursor, and Codex that refuses to look AI-generated.
Live demo → · twenty themes · four verbs · press T to cycle.
Made by Together AI.
Hallmark picks a macrostructure for the brief, dresses it in one of twenty themes, runs fifty-seven slop-test gates plus a pre-emit self-critique, and refuses the on-distribution defaults every LLM was trained into. Two pages by Hallmark for two different briefs feel like different sites, not colour-swaps of the same template.
Four verbs
Verb<br>What it does
(default)<br>Build new UI. Picks a macrostructure, applies the rule-set, runs the slop test before handing back.
hallmark audit<br>Score existing code against the anti-patterns. Punch list, no edits.
hallmark redesign<br>Throw out the structure, keep copy + IA + brand, rebuild with a different fingerprint.
hallmark study<br>Extract the DNA from a design you admire: macrostructure, type-pairing, colour anchor. Refuses pixel-clones and paid templates. Optionally emits a portable design.md for handoff to other AI tools.
Different briefs, different shapes
Each generated from a different brief. The skill picks the theme, structure, and craft to fit each one, not from a template.
Bubble<br>Sourdough app · Hum<br>Distil<br>Extraction API · Cobalt<br>Cold Snap<br>Record label · Carnival<br>Cinder<br>AI tool · Lumen
Ferns & Fathom<br>Tea menu · Custom<br>Hollowback Apiary<br>Honey farm · Garden<br>Off-Register<br>Print fair · Riso<br>Press Quaternary<br>Type studio · Custom
Tally<br>SaaS · modern-minimal<br>Wayfare<br>Travel · atmospheric<br>NAJM<br>Fashion brand<br>Hyperlane<br>Dev infrastructure
Each page is self-contained HTML + CSS, stamped with its macrostructure in the CSS comment. Browse the full set at usehallmark.com or under site/_tests/.
Custom NEW
When a brief carries creative intent that no catalog theme fits, Hallmark switches to Custom and designs the page from scratch: a made-to-measure palette, type, and layout. Same 57 slop-test gates, no template underneath.
The Cascadia Nightjar<br>Sleeper-train ticket · Custom<br>The Mend Assembly<br>Repair-café broadsheet · Custom
It stays a quiet branch; vanilla briefs never see it. The protocol lives in custom-theme.md.
Install
npx skills add nutlope/hallmark
Re-run any time to update. Or copy SKILL.md + references/ into:
Claude Code : ~/.claude/skills/hallmark/
Cursor : .cursor/rules/hallmark.mdc (body of SKILL.md, no frontmatter)
Codex : ~/.codex/skills/hallmark/ (personal) or .codex/skills/hallmark/ (project-scoped)
The rule-set lives in SKILL.md and references/. Worked examples in docs/recipes.md and docs/study-examples.md.
Licence
MIT. Use it, fork it, ship it.
About<br>Anti-AI-slop design skill for Claude Code, Cursor, and Codex.<br>www.usehallmark.com/<br>Resources<br>Readme<br>MIT license<br>Activity<br>Stars<br>18.0k stars<br>Watchers<br>40 watching<br>Forks<br>905 forks<br>Report repository
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