pbakaus/impeccable — The design language that makes your AI harness better at design.

What happened

The project pbakaus/impeccable was shared on GitHub. It gives AI coding agents a design skill, 24 commands, and tools that check AI-made frontend designs. You install it with one command, then run a setup step inside your AI coding tool.

Key facts

• 1 skill, 24 commands
• 62 automatic detector rules that check designs without using an AI model or API key
• Setup: run npx impeccable install, then /impeccable init
• Setup writes a PRODUCT.md file that stores facts about the product, such as the audience and purpose

Why it started

Anthropic's frontend-design skill for Claude was one of the first widely used design skills. Impeccable was built on top of that idea. The authors say AI models trained on the same SaaS templates often make the same design mistakes, such as Inter font everywhere, purple-to-blue gradients, and cards inside cards.

Why it matters

Many AI-built apps look alike. A tool that gives AI clear design rules and checks can help teams make designs that fit their product. It also lets people who are not designers ask for design help using simple commands like polish, audit, or animate.

What to watch

• Whether more AI coding tools adopt the skill and commands
• How well the 62 detector rules catch real design problems
• Updates to the full docs at impeccable.style