impeccable-posttooluse-hook-zero-token-design-scanning

The impeccable npm package provides a 3,590-line deterministic JS engine with 25 anti-pattern rules (13 AI-slop tells + 12 general quality) that can be wired as a PostToolUse hook on Write/Edit to .html/.css/.tsx/.jsx/.svelte/.astro files via npx impeccable detect --json <file>. This gives zero-LLM-cost automated design quality scanning that catches what LLMs miss. The 13 AI-slop tells include: Inter/default fonts, purple-blue gradients, bounce easing, glassmorphism, pill badges, card-in-card nesting, gradient text, centered-everything layout, emoji in UI.

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