{
  "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": "2026-06-10T18:21:01.023Z",
  "title": "Tail Latency Pledge — p99 / p999 / p9999",
  "purpose": "Most performance budgets stop at p75. This contract publishes hard caps for the long tail — the requests that ruin trust.",
  "units": {
    "time": "ms"
  },
  "targets": {
    "p75": {
      "ttfb": 400,
      "lcp": 1800,
      "inp": 150
    },
    "p99": {
      "ttfb": 800,
      "lcp": 3000,
      "inp": 400
    },
    "p999": {
      "ttfb": 1500,
      "lcp": 5000,
      "inp": 800
    },
    "p9999": {
      "ttfb": 3000,
      "lcp": 8000,
      "inp": 1500
    }
  },
  "rationale": "A site with great p75 and terrible p9999 still loses ~0.01% of users per visit. At scale that is millions of disappointed humans.",
  "techniques": [
    "Request hedging: fire backup request after p99 budget elapses.",
    "Tail-aware load balancing (least-outstanding-requests).",
    "Per-tenant circuit breakers triggered on p99 regression."
  ]
}