Shared design vocabulary
Critique a layout, fix the type, recolor it. Steer your agent in plain language and have it understand exactly what you mean.
Impeccable teaches AI agents to speak design. A designer, engineer, or founder steers in plain language and watches the work change live in the browser.
- 40,000+
- GitHub stars
- 160,000+
- Installs via skills.sh alone
- Every harness
- Claude Code, Cursor, Copilot, Gemini & more
A shared design vocabulary for you and your agent.
Impeccable started as an open-source design skill for AI coding agents. It gives builders and agents a shared design vocabulary, persistent project context, deterministic quality checks, and a live browser loop for visual iteration. It runs in the real codebase, where the work will actually ship. Whatever you create with it is real production code, ready to go.
Persistent project context
Your design intent and decisions stick around, so the agent stays consistent across sessions instead of starting from zero every time.
Deterministic quality checks
Catch the tells that have nothing to do with taste: weak hierarchy, lazy spacing, broken contrast. Before they ever ship.
Live browser loop
Point at the work, steer it, compare variants, and accept changes back into source. Watch it change live, in the browser, where it ships.
One command.
Install Impeccable into your project and your agent learns design on the spot.
npx impeccable installAlso available through Claude’s native marketplace, and pre-bundled with the new GitHub Copilot app.
Impeccable is the first expression of a broader bet: AI does its best creative work when a human is actively part of the loop. It decidedly won’t be the only tool we build.
Read the thesis →