impeccable-deterministic-design-scanner-25-rules-zero-llm-cost
The impeccable npm package (github.com/pbakaus/impeccable) provides a 3,590-line deterministic JS engine with 25 rules covering AI-slop detection (13 rules: Inter/default fonts, purple gradients, glassmorphism, pill badges, gradient text, emoji in UI, etc.) and general quality (12 rules: contrast, spacing, orphaned text, hover states, shadow misuse). Run via npx impeccable detect --json <file> with zero LLM cost. Wire as a PostToolUse hook on Write/Edit to HTML/CSS/TSX/JSX files for automated design quality enforcement.
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