Verified project record

pbakaus/impeccable

A design language and skill collection for AI coding agents that provides shared design vocabulary, deterministic detector rules, and live browser iteration to address repetitive AI-generated frontend patterns. It runs without an LLM for design detection and integrates into existing AI coding tools via a single command.

Project overview

Project type: AI Coding
Use cases: Documents & Office · Coding & Development
Deployment: Refer to project documentation
License: Apache-2.0

Best for

Developers using AI coding agents who need deterministic detection of UI anti-patterns and a shared vocabulary for frontend design.

Key capabilities

Provides a shared design vocabulary accessible via /impeccable that includes commands for planning, auditing, polishing, and critiquing UI design.
Includes 46 deterministic rules that catch AI design anti-patterns and general design quality issues, runnable via CLI or browser extension without an LLM.
Writes PRODUCT.md and DESIGN.md files to capture the audience, brand/product lane, voice, colors, and components for later commands to utilize.
Provides a visual variant mode to iterate on elements directly in the browser.
Runs design detectors automatically on direct UI file edits and surfaces findings back into the agent flow.

Limitations and risks

Codex users must manually open `/hooks` and approve the project hook after install or update.
The tool writes working files to `.impeccable/` that need proper gitignore configuration to avoid committing ephemeral data.
Telemetry practices are not documented.

Getting started

From your project root, run `npx impeccable install`, then run `/impeccable init` inside your AI coding tool to get started.

Evidence and sources

GitHub project description: The design language that makes your AI harness better at design.
README: Design guidance for AI coding agents. 1 skill, 23 commands, live browser iteration, and 46 deterministic detector rules for AI-generated frontend design.
README: Skip the guidance and you get the same handful of tells on every project: Inter for everything, purple-to-blue gradients, cards nested in cards, gray text on colored backgrounds,…
README: One setup flow. `/impeccable init` writes `PRODUCT.md` and offers `DESIGN.md`
README: - [Cursor](https://cursor.com) - [Claude Code](https://claude.ai/code) - [GitHub Copilot](https://github.com/features/copilot)

Reviewed at: 2026-07-17T07:09:32Z