Impeccable
Design vocabulary and skill system for AI agents that addresses visual uniformity in AI-generated interfaces
36K
GitHub Stars
23
Commands
41
Anti-Pattern Rules
Overview
Impeccable is a design vocabulary and skill system for AI agents that addresses the visual uniformity problem in AI-generated interfaces. Created by Paul Bakaus (former Google engineer and creator of Khroma), it provides 23 design commands organized by discipline—typography, color, motion, layout—plus a "slop detector" with 41 deterministic rules that block AI anti-patterns before deployment. Works with Cursor, Claude Code, GitHub Copilot, Gemini CLI, and Codex CLI.
The Verdict
Who Should Use Impeccable?
Best For
- Teams using multiple AI coding tools
- Projects needing design consistency with AI
- CI/CD pipelines requiring design quality gates
- Developers wanting shared design vocabulary with AI
- Products with existing brand guidelines
Not Ideal For
- Quick prototypes where consistency doesn't matter
- Teams without design tokens or systems
- Backend-only development
- Projects with no existing brand identity
What's Great
- Works across multiple AI agents (Cursor, Claude Code, Copilot, Gemini)
- 41 deterministic anti-pattern rules—no LLM required for detection
- CI/CD compatible slop detector
- Design system inheritance (tokens, components, conventions)
- DESIGN.md format for portable design documentation
- Live mode iteration with HMR support
- Respects existing brand guidelines
Watch Out For
- Requires understanding of design vocabulary
- Setup needed for design token integration
- Opinionated about what constitutes "slop"
- May reject valid but unconventional designs
Pricing
View all features & details
23 Design Commands
- polish - Refine overall design
- audit - Check design quality
- critique - Get feedback
- distill - Simplify design
- animate - Add motion
- bolder - Increase visual weight
- quieter - Reduce visual noise
- And 16 more...
7 Domain References
- Typography
- Color
- Motion
- Spatial
- Interaction
- Responsive
- UX Writing
Slop Detector
- 27 deterministic anti-pattern rules
- 12-rule LLM critique pass
- CLI and browser extension
- No API key required for deterministic rules
- CI/CD integration
Supported Tools
- Cursor
- Claude Code
- GitHub Copilot
- Gemini CLI
- Codex CLI
How It Compares
| Feature | Impeccable | Frontend Design | v0 |
|---|---|---|---|
| Type | Multi-Agent Skill | Claude Code Only | Web App |
| Price | Free | Free | Freemium |
| GitHub Stars | 36K | 148K | N/A |
| Slop Detection | 41 rules, CI/CD | No | No |
| Multi-IDE Support | Yes (5+ tools) | Claude Code only | N/A |
| Design System Integration | Full (tokens, DESIGN.md) | Limited | Shadcn |
| Best For | Teams, CI/CD | Individual devs | Quick prototypes |
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