Nutlope/hallmark — a trending CSS project

Nutlope/hallmark — CSS · 31,472 stars · 1,624 forks · +567 today

Anti-AI-slop design skill for Claude Code, Cursor, and Codex.

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A design skill for Claude Code, Codex, Cursor and OpenCode that refuses to look AI-generated.

usehallmark.com  ·  forty-eight themes  ·  custom on request  ·  redesign and audit by name

Made by Together AI.

Hallmark holds a hard floor and then gets out of the way. It deals three themes from a catalog of forty-eight materials, builds the page around what the visitor came to do, and lints the result in a real browser against the tells that read as machine-made: the eyebrow above every heading, tracked-capital labels, one coloured word in a headline, a page of empty frames or nothing but photographs, a hero that misses its screen, an email sign-up at the end of every page, a form that says thanks without sending anything. A fresh-context reviewer gets the last word.

The gates come in tiers. The Floor never ships (contrast, focus, reduced motion, invented facts, a broken phone layout). Reflex gates are the defaults a model falls into; a build with a reason may overrule one on the record. Finish checks are craft detail that never blocks a ship.

• Forty-eight themes. Each is a material (paper, type, colour, surfaces, its own components and texture) with a picture of a finished page, and the build lays out its own page in it.
• Built from the job. A booking page books, a shop sells, a newsletter subscribes: the action sits where the category puts it, and the page ends on it.
• Custom. Ask for a custom page and Hallmark designs from your prompt alone, under the same rules and checks.
• Your real product. Point it at a URL, a dev server or an app and it captures the screenshots itself.
• Real photographs. 755 openly licensed photos, picked per subject and credited on the page.
• Redesign and audit. /hallmark redesign <path> rebuilds a page and keeps its content and wiring; /hallmark audit <path> only reports.

Ten of the forty-eight. A theme is a material, not a plan: it never says what a page contains or in what order, so two prompts in one theme make two different pages. Each is one file of at most 8 KB in references/themes/ with a picture beside it; a build reads exactly one. See them all at usehallmark.com.

Say custom and Hallmark drops the themes: no plan, no components, no palette recipe, only the floor, the gates and a short direction in direction.md to find one idea that only this client has and let it run the page.

1. Pre-flight reads the project (fonts, palette, framework, a locked design.md) and asks once for the material: photos, screenshots, real numbers. Nothing is invented.
2. scripts/theme.mjs deal offers three themes that fit the prompt and clear the log; draw deals the page's anatomy from its job.
3. The hero is built alone, rendered and reviewed cold before the rest of the page exists.
4. scripts/sloplint.mjs --render checks the page at eight widths, then a subagent reviews it with fresh eyes.

Each page is self-contained HTML and CSS, stamped in its first CSS comment with the decisions it took.

Hallmark never starts on a design that already exists unless you name it:

/hallmark redesign ./src/app
/hallmark audit ./index.html

A full redesign keeps the content and the wiring and changes the system and the layout; say keep the layout for a restyle or polish for only the tells. sloplint --before records every link, field, handler and heading first, sloplint --kept fails the redesign if one went missing, and the handoff is a side-by-side before and after.

npx skills add nutlope/hallmark -g

-g installs for every project; leave it off to install into the current one. Needs Node 18 or later. The browser checks (sloplint --render, screenshots) also need npm i -g puppeteer-core and Chrome; without them the static checks still run.

• One harness only: npx skills add nutlope/hallmark -g --agent claude-code (or codex, opencode, cursor, github-copilot).
• As a Claude Code plugin: /plugin marketplace add nutlope/hallmark, then /plugin install hallmark@hallmark (invoked as /hallmark:hallmark).
• From a clone: node skills/hallmark/scripts/install.mjs validates every theme and reference before it copies; install-hook.mjs adds an edit-time Floor check to Claude Code.
• Lint any page: node skills/hallmark/scripts/sloplint.mjs <file-or-dir> --render.
• If it does not fire on its own, name it: use hallmark to build ....

MIT. Use it, fork it, ship it.

The photo library (skills/hallmark/scripts/photos.json) lists photographs hosted on Wikimedia Commons and holds no image files. Each keeps its own licence (CC0, public domain, CC BY or CC BY-SA), and Hallmark credits every one it uses on the page. It does not use stock sites (Unsplash, Pexels, Pixabay), whose terms bar AI tools from picking their images.

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Content above is the README of Nutlope/hallmark, reproduced from GitHub’s trending list. All rights remain with the original authors.