Impeccable

Every AI-generated UI looks the same. Inter font. Purple gradient hero. Rounded cards with drop shadows. You've seen it a thousand times because that's what the training data taught these models to produce. Impeccable fixes this at the vocabulary level. Created by Paul Bakaus, it's a design language skill that injects 7 domain-specific reference files — covering typography, color, layout, motion, interaction, responsive design, and UX writing — directly into your AI coding agent's context. The result: a 1.59x improvement in design quality from vocabulary injection alone. No model upgrade needed. The skill extends Anthropic's official frontend-design skill (277K installs) with substantially more depth. Where the original gives general guidance, Impeccable provides 20 slash commands forming a complete design workflow: /audit for quality checks, /critique for UX review, /normalize for design system alignment, /polish for pre-ship finalization, /animate, /colorize, /typeset, /arrange, and more. The curated anti-pattern library is what makes it genuinely different. Impeccable explicitly tells AI what NOT to do: no overused fonts (Inter, Arial), no gray text on colored backgrounds, no pure blacks/grays, no excessive card nesting, no dated bounce easing. These anti-patterns counteract the training data biases that make every AI-generated UI look like a template. Compatible with Claude Code, Cursor, Gemini CLI, Codex CLI, VS Code Copilot, OpenCode, Kiro, Trae, and Rovo Dev. Install with npx skills add pbakaus/impeccable — it auto-detects your harness and places files correctly. With 15,900 GitHub stars and Apache 2.0 licensing, Impeccable is the most popular design skill in the AI coding ecosystem. If you're tired of your AI building things that look like every other AI built them, this is the fix. Pair it with tools like Bolt.new or Stripe MCP for a complete AI-powered development workflow.