## Monitoring
- [ ] RUM tracking (Vercel Speed Insights or `useReportWebVitals`)
- [ ] Per-PAGE field p75 for LCP/INP/CLS (not just site average)
- [ ] Bundle size budget enforced in CI
- [ ] Lighthouse CI budgets gate merges (LCP ≤ 2500 / INP ≤ 200 / CLS ≤ 0.1)
- [ ] Field-data alerts when p75 crosses the "good" threshold
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