Design skills that stop AI pages looking AI-made

Why everyone’s installing them

Ask a coding agent for a web page and you tend to get the same one: Inter everywhere, a purple-to-blue gradient, a small label over every heading and a row of cards in cards. Design skills are instruction packs you drop into Claude Code, Codex or Cursor that name those habits, ban them and give the agent a way to check its own work.

• They catch the tells. Each one lists the defaults that make a page look generated and flags them before you see the result.
• They pick a direction first. Instead of one safe look, the agent starts from a theme or an art direction that fits the subject.
• They look at the result. Scripts open the page in a real browser, take screenshots and lint it, so the agent fixes what it can see.

The three people use

• ImpeccableFree A design vocabulary for agents: commands like polish and bolder to steer, critique and audit to review, and a detector of 62 rules that needs no API key. By Paul Bakaus, Apache 2.0, around 93,000 stars. npx impeccable install pbakaus/impeccable on GitHub
• Taste SkillFree Art direction from a study of 247 award-winning sites: it deals a few directions, you pick one, and it checks the build in a browser. MIT, around 105,000 stars. npx skills add https://github.com/Leonxlnx/taste-skill --skill "design-taste-frontend" Leonxlnx/taste-skill on GitHub
• HallmarkFree From Together AI: fifty themes, a hard floor of rules that never ship, and a browser lint plus a fresh reviewer at the end. Also redesigns or audits an existing page. MIT, around 41,000 stars. npx skills add nutlope/hallmark -g Nutlope/hallmark on GitHub

Set one up

1. Pick one. They overlap and sometimes disagree, so start with a single skill rather than all three.
2. Install it in your project. Run its install command from the project folder (or globally), then restart Claude Code, Codex or Cursor.
3. Name it in the prompt. Most fire on their own for UI work, but “use hallmark to build…” or “/impeccable critique” makes sure.
4. Give it real material. Screenshots, photos and real numbers make more difference than any rule; the skills won’t invent them for you.