Skill

Impeccable

Design language and command set that makes AI harnesses better at frontend design

View on GitHub★ 81,984 stars, as of 2026-10-16

Install

npx impeccable install

Then run /impeccable init inside your AI coding tool.

Taken from the project README. Check the source for the latest instructions.

Before / after

Same standard brief both times: a landing page for Tally, a fictional budgeting app, screenshotted at 1440px. Before = no skill. After = generated by us applying the skill's published instructions to that brief. We did not run the skill inside its own agent or tooling, so results may differ from a native install. How we test

Before: Tally landing page without any skill — Before (no skill)

After: Tally landing page with Impeccable — After (with Impeccable)