Impeccable: design commands that stop coding agents shipping the same ugly UI

Gives coding agents design rules and automatic checks so generated app screens stop looking identical.

In today's Spotlight · Picked by 3 of 4 modelsGives coding agents design rules and automatic checks so generated app screens stop looking identical.Like a spell-checker, but for visual design mistakes.

Open-source design skill for coding agents with 24 commands and 61 deterministic detector rules that flag AI design tells like purple gradients and nested cards, now bundled with the GitHub Copilot app and past 90,000 stars.

trendingcoding · ideJEV traction 0.73pbakaus/impeccable · 92,901 ★added 2026-10-29

Open Impeccable →View on the radar

Why it matters

It gives agents a shared design vocabulary plus rules that run without an LLM or API key, so design quality is checked deterministically instead of hoped for in a prompt.

What you could build with it

A solo developer could install a design skill like this as the default reviewer for every client landing page: the agent drafts, the detector rules flag slop tells, and the page only ships after the audit command passes.

Does it hold up?

Usable now as a skill install: one npx command plus a plugin route, deterministic rules that need no API key, and Copilot bundling as distribution evidence; measured design-quality gains remain anecdotal rather than benchmarked.

Built with Impeccable

Impeccable: Stop Your AI Coding Agent From Building the Same Ugly UIarticle · Walkthrough of the 24 commands and 61 detector rules, with install via npx and the Copilot plugin route.
Impeccable design skill for better UIarticle · October 26 writeup noting 87,491 stars, Apache-2.0 licensing, and a GitHub Trending day with 1,113 new stars.
Impeccable star history and snapshotsarticle · Daily star snapshots showing 37,584 stars gained over 90 days and a best day of 1,509 on October 27.

Learn more

official docs →

First spotted on github: source.

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