Impeccable
The vocabulary you didn't know you needed. 1 skill, 23 commands, and curated anti-patterns for impeccable frontend design.
Quick start: Visit impeccable.style to download ready-to-use bundles.
Why Impeccable?
Anthropic's frontend-design was the first widely-used design skill for Claude. Impeccable started from there.
Every model trained on the same SaaS templates. 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, the rounded-square icon tile above every heading.
Impeccable adds:
- 7 domain reference files (view source). Typography, color, motion, spatial, interaction, responsive, UX writing. Load on every command, alongside a brand-vs-product register that adjusts the defaults.
- 23 commands. A shared design vocabulary with your AI:
polish, audit, critique, distill, animate, bolder, quieter, and more.
- 27 deterministic anti-pattern rules plus a 12-rule LLM critique pass. CLI and browser extension run the deterministic ones with no LLM and no API key. Each is tied to specific design guidance the skill teaches against.
What's Included
The Skill: impeccable
A comprehensive design skill with 7 domain-specific references (view skill):
| Reference | Covers |
|---|
| typography | Type systems, font pairing, modular scales, OpenType |
| color-and-contrast | OKLCH, tinted neutrals, dark mode, accessibility |
| spatial-design | Spacing systems, grids, visual hierarchy |
| motion-design | Easing curves, staggering, reduced motion |
| interaction-design | Forms, focus states, loading patterns |
| responsive-design | Mobile-first, fluid design, container queries |
| ux-writing | Button labels, error messages, empty states |
23 Commands
All commands are accessed through /impeccable:
| Command | What it does |
|---|
/impeccable craft | Full shape-then-build flow with visual iteration |
/impeccable teach | One-time setup: gather design context, write root PRODUCT.md and DESIGN.md |
/impeccable document | Generate root DESIGN.md from existing project code |
/impeccable extract | Pull reusable components and tokens into the design system |
/impeccable shape | Plan UX/UI before writing code |
/impeccable critique | UX design review: hierarchy, clarity, emotional resonance |
/impeccable audit | Run technical quality checks (a11y, performance, responsive) |
/impeccable polish | Final pass, design system alignment, and shipping readiness |
/impeccable bolder | Amplify boring designs |
/impeccable quieter | Tone down overly bold designs |
/impeccable distill | Strip to essence |
/impeccable harden | Error handling, i18n, text overflow, edge cases |
/impeccable onboard | First-run flows, empty states, activation paths |
/impeccable animate | Add purposeful motion |
/impeccable colorize | Introduce strategic color |
/impeccable typeset | Fix font choices, hierarchy, sizing |
/impeccable layout | Fix layout, spacing, visual rhythm |
/impeccable delight | Add moments of joy |
/impeccable overdrive | Add technically extraordinary effects |
/impeccable clarify | Improve unclear UX copy |
/impeccable adapt | Adapt for different devices |
/impeccable optimize | Performance improvements |
/impeccable live | Visual variant mode: iterate on elements in the browser |
Use /impeccable pin <command> to create standalone shortcuts (e.g., pin audit creates /audit).
Usage Examples
/impeccable audit blog # Audit blog hub + post pages
/impeccable critique landing # UX design review
/impeccable polish settings # Final pass before shipping
/impeccable harden checkout # Add error handling + edge cases
Or use /impeccable directly with a description:
/impeccable redo this hero section
Anti-Patterns
The skill includes explicit guidance on what to avoid:
- Don't use overused fonts (Arial, Inter, system defaults)
- Don't use gray text on colored backgrounds
- Don't use pure black/gray (always tint)
- Don't wrap everything in cards or nest cards inside cards
- Don't use bounce/elastic easing (feels dated)
See It In Action
Visit impeccable.style to see before/after case studies of real projects transformed with Impeccable commands.
Installation
Option 1: Download from Website (Recommended)
