{
  "pack": "zeus-performance-100y-v2",
  "version": "1.0.0",
  "freezeDate": "2026-05-06",
  "nextReviewYear": 2031,
  "horizonYear": 2076,
  "provenanceRoot": "3911a0aef0d5ffa0cd7796c7931f8353bbffcce845ae09a155e4c4a55ed1f8e2",
  "owner": {
    "name": "Vladoi Ionut",
    "email": "vladoi_ionut@yahoo.com",
    "btc": "bc1q4f7e66z87mdfj56kz0dj5hvcnpmh0qh4wuv22e"
  },
  "timestamp": "2026-06-10T18:21:58.030Z",
  "title": "Perceptual Quality Index (PQI) — Beyond Core Web Vitals",
  "purpose": "A composite index measuring smoothness, jitter, audio-video sync, and motion clarity. Existing CWV measure speed but not feel.",
  "components": [
    {
      "id": "frame-jitter",
      "unit": "ms",
      "target_p75": 4,
      "weight": 0.25
    },
    {
      "id": "scroll-smoothness",
      "unit": "fps",
      "target_p75": 58,
      "weight": 0.2
    },
    {
      "id": "motion-photon-latency",
      "unit": "ms",
      "target_p75": 80,
      "weight": 0.2
    },
    {
      "id": "av-sync-drift",
      "unit": "ms",
      "target_p75": 20,
      "weight": 0.15
    },
    {
      "id": "interaction-feedback",
      "unit": "ms",
      "target_p75": 100,
      "weight": 0.2
    }
  ],
  "formula": "PQI = 100 - Σ(weight_i × normalized_breach_i × 100). Target PQI ≥ 90.",
  "measurement": "Sampled via PerformanceObserver(longanimationframe) + Layout Shift API + custom rAF jitter probe."
}