Impeccable

The vocabulary you didn't know you needed. 1 skill, 17 commands, and curated anti-patterns for impeccable frontend design.

Quick start: Visit impeccable.style to download ready-to-use bundles.

Why Impeccable?

Anthropic created frontend-design, a skill that guides Claude toward better UI design. Impeccable builds on that foundation with deeper expertise and more control.

Every LLM learned from the same generic templates. Without guidance, you get the same predictable mistakes: Inter font, purple gradients, cards nested in cards, gray text on colored backgrounds.

Impeccable fights that bias with:

• An expanded skill with 7 domain-specific reference files
• 15 steering commands to audit, polish, simplify, animate, and more
• Curated anti-patterns that explicitly tell the AI what NOT to do

What's Included

The Skill: frontend-design

A comprehensive design skill with 7 domain-specific references:

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

17 Commands

Command	What it does
/teach-impeccable	One-time setup: gather design context, save to config
/audit	Run technical quality checks (a11y, performance, responsive)
/review	UX design review: hierarchy, clarity, emotional resonance
/normalize	Align with design system standards
/polish	Final pass before shipping
/simplify	Strip to essence
/clarify	Improve unclear UX copy
/optimize	Performance improvements
/harden	Error handling, i18n, edge cases
/animate	Add purposeful motion
/colorize	Introduce strategic color
/bolder	Amplify boring designs
/quieter	Tone down overly bold designs
/delight	Add moments of joy
/extract	Pull into reusable components
/adapt	Adapt for different devices
/onboard	Design onboarding flows

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)

Installation

Option 1: Download from Website (Recommended)

Visit impeccable.style, download the ZIP for your tool, and extract to your project.

Option 2: Copy from Repository

Cursor:

cp -r dist/cursor/.cursor your-project/

Claude Code:

# Project-specific
cp -r dist/claude-code/.claude your-project/

# Or global (applies to all projects)
cp -r dist/claude-code/.claude/* ~/.claude/

Gemini CLI:

cp dist/gemini/GEMINI*.md your-project/
cp -r dist/gemini/.gemini/* ~/.gemini/

Codex CLI:

cp -r dist/codex/.codex/* ~/.codex/

Usage

Once installed, use commands in your AI coding tool:

/audit           # Find issues
/normalize       # Fix inconsistencies
/polish          # Final cleanup
/simplify        # Remove complexity

Most commands accept an optional argument to focus on a specific area:

/audit header
/polish checkout-form

Note: Codex CLI uses a different syntax: /prompts:audit, /prompts:polish, etc.

Supported Tools

• Cursor
• Claude Code
• Gemini CLI
• Codex CLI

Contributing

See DEVELOP.md for contributor guidelines and build instructions.

License

Apache 2.0. See LICENSE.

The frontend-design skill builds on Anthropic's original. See NOTICE.md for attribution.

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Created by Paul Bakaus