impeccable

name	impeccable
description	Design polish with 27 deterministic anti-pattern rules + 12-rule LLM critique. By Paul Bakaus (jQuery UI creator). Commands: polish, audit, critique, typeset, animate, colorize, layout, delight. Apache-2.0.
license	Apache-2.0
auto-activate	false

impeccable

Hybrid design polish tool — 27 deterministic anti-pattern rules (Layer 1) plus 12-rule LLM critique (Layer 3). Created by Paul Bakaus (jQuery UI creator, former Google Chrome DevTools/AMP DevRel).

Source: https://www.claudepluginhub.com/plugins/pbakaus-impeccable

Install

Install commands are from upstream documentation and may change. Check the Plugin Hub page for current instructions.

# CLI detection mode
npx impeccable detect

# Full install
npm install -g impeccable

Also available as a browser extension.

Modes

Mode	When to use
Brand	Design IS the product (marketing sites, portfolios)
Product	Design SERVES the product (SaaS, tools, dashboards)

Commands

polish, audit, critique, typeset, animate, colorize, layout, delight

Why It's Strong

The 27 deterministic rules align with Loam's 60/30/10 layer triage — most design checks are Layer 1 (deterministic), not Layer 3 (LLM). The tool runs the deterministic rules first, then uses LLM critique only where judgment is needed.

Also detects AI-generated design fingerprints.

Known Issues

• Live mode can disconnect
• Component selection finicky on deeply nested DOM
• adapt command can break layouts
• Monorepo file targeting has edge cases

Requirements

• Node.js (pnpm or Bun)
• Puppeteer for CLI mode
• No API keys needed for deterministic rules

Notes

• Apache-2.0 license, actively maintained
• Strongest design tool evaluated
• Frontend-focused — no value for backend-only projects