impeccable-deterministic-design-scanner-posttooluse-hook

The impeccable npm package contains a 3,590-line JS detection engine with 25 zero-LLM-cost design anti-pattern rules (13 AI-slop tells + 12 general quality). Wire as a PostToolUse hook via npx impeccable detect --json <file> triggered on Write/Edit to .html/.css/.tsx/.jsx/.svelte/.astro files to surface violations inline without token cost. This gives deterministic quality scanning that catches what LLMs miss.