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Hallmark – Anti-AI-Slop Design Skill for Claude Code, Cursor, and Codex

Together AI released Hallmark, an anti-AI-slop design skill for Claude Code, Cursor, and Codex that generates UI with twenty themes, four verbs, and 57 slop-test gates plus a pre-emit self-critique to avoid on-distribution defaults. The skill picks a macrostructure for each brief, dresses it in one of twenty themes, and can switch to a custom mode for creative intent that designs from scratch without a template. Hallmark is available under MIT license via npx skills add nutlope/hallmark.

read2 min views1 publishedJul 26, 2026
Hallmark – Anti-AI-Slop Design Skill for Claude Code, Cursor, and Codex
Image: source

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.

Verb What it does
(default)
Build new UI. Picks a macrostructure, applies the rule-set, runs the slop test before handing back.
hallmark audit <target>
Score existing code against the anti-patterns. Punch list, no edits.
hallmark redesign <target>
Throw out the structure, keep copy + IA + brand, rebuild with a different fingerprint.
`hallmark study <screenshot URL>`
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.

Each generated from a different brief. The skill picks the theme, structure, and craft to fit each one, not from a template.

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/.

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 NightjarSleeper-train ticket · Custom | The Mend AssemblyRepair-café broadsheet · Custom |

It stays a quiet branch; vanilla briefs never see it. The protocol lives in custom-theme.md.

npx skills add nutlope/hallmark

Re-run any time to update. Or copy SKILL.md +

into:

references/

Claude Code:~/.claude/skills/hallmark/

Cursor:.cursor/rules/hallmark.mdc

(body ofSKILL.md

, no frontmatter)Codex:~/.codex/skills/hallmark/

(personal) or.codex/skills/hallmark/

(project-scoped)

The rule-set lives in SKILL.md and

. Worked examples in

references/

and

docs/recipes.md

.

docs/study-examples.md

MIT. Use it, fork it, ship it.

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