Impeccable

The vocabulary you didn't know you needed. 1 skill, 20 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 (view source)
• 20 steering commands to audit, review, polish, distill, 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 (view skill):

20 Commands

Usage Examples

/audit - Run quality checks, get a report (no edits)

/audit blog              # Audit blog hub + post pages
/audit dashboard         # Check dashboard components
/audit checkout flow     # Focus on checkout UX

When to use: Before making changes, to understand what needs fixing.

/normalize - Align with design system

/normalize blog          # Apply design tokens, fix spacing
/normalize buttons       # Standardize button styles

When to use: After audit, to fix inconsistencies.

/critique - UX design review

/critique landing page   # Review landing page UX
/critique onboarding     # Check onboarding flow

When to use: When you want design feedback, not technical fixes.

/polish - Final pass before shipping

/polish feature modal    # Clean up modal before release
/polish settings page    # Final review of settings UI

When to use: Last step before deploying to production.

Combining commands:

/audit /normalize /polish blog    # Full workflow: audit → fix → polish
/critique /harden checkout        # UX review + add error handling

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)

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/

Note: Cursor skills require setup:

1. Switch to Nightly channel in Cursor Settings → Beta
2. Enable Agent Skills in Cursor Settings → Rules

Learn more about Cursor skills

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/

OpenCode:

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

Pi:

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

Gemini CLI:

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

Note: Gemini CLI skills require setup:

1. Install preview version: npm i -g @google/gemini-cli@preview
2. Run /settings and enable "Skills"
3. Run /skills list to verify installation

Learn more about Gemini CLI skills

Codex CLI:

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

Trae:

# Trae China (domestic version)
cp -r dist/trae/.trae-cn/skills/* ~/.trae-cn/skills/

# Trae International
cp -r dist/trae/.trae/skills/* ~/.trae/skills/

Note: Trae has two versions with different config directories:

• Trae China: ~/.trae-cn/skills/
• Trae International: ~/.trae/skills/

After copying, restart Trae IDE to activate the skills.

Usage

Once installed, use commands in your AI harness:

/audit           # Find issues
/normalize       # Fix inconsistencies
/polish          # Final cleanup
/distill         # 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.

CLI

Impeccable includes a standalone CLI for detecting anti-patterns without an AI harness:

bun bin/impeccable.mjs detect src/                   # scan a directory
bun bin/impeccable.mjs detect index.html             # scan an HTML file
bun bin/impeccable.mjs detect https://example.com    # scan a URL (Puppeteer)
bun bin/impeccable.mjs detect --fast --json .        # regex-only, JSON output

The detector catches 25 issues across AI slop (side-tab borders, purple gradients, bounce easing, dark glows) and general design quality (line length, cramped padding, small touch targets, skipped headings, and more).

Supported Tools

• Cursor
• Claude Code
• OpenCode
• Pi
• Gemini CLI
• Codex CLI
• VS Code Copilot
• Kiro
• Trae

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.

Created by Paul Bakaus