{
 "meta": {
  "dataset": "mimir-agent-traces v2 increment 1",
  "surgery": "S2 prefix-cache wiring (a62d163+33e0d2b+8895067)",
  "date": "2026-09-07",
  "description": "Before/after cache hit-rate traces for Mimir S2 surgery. before=mechanism probe (96.9% same-prefix resend); after=33 real-traffic calls post gateway restart (weighted 78.5%, steady-state median 96.9%, cold-start 8.9-18.9%, session-boundary first-shot 42.9%=shared stable prefix 8576 tokens)",
  "license_note": "cache metrics only, no secrets, no message content"
 },
 "after_traces": [
  {
   "ts": "2026-09-07 18:35:00",
   "prompt_tokens": 11460,
   "cache_hit_tokens": 1408,
   "cache_miss_tokens": 10052,
   "hit_pct": 12.3
  },
  {
   "ts": "2026-09-07 18:35:05",
   "prompt_tokens": 38962,
   "cache_hit_tokens": 3456,
   "cache_miss_tokens": 35506,
   "hit_pct": 8.9
  },
  {
   "ts": "2026-09-07 18:35:24",
   "prompt_tokens": 41674,
   "cache_hit_tokens": 39680,
   "cache_miss_tokens": 1994,
   "hit_pct": 95.2
  },
  {
   "ts": "2026-09-07 18:35:35",
   "prompt_tokens": 45654,
   "cache_hit_tokens": 42880,
   "cache_miss_tokens": 2774,
   "hit_pct": 93.9
  },
  {
   "ts": "2026-09-07 18:35:41",
   "prompt_tokens": 53416,
   "cache_hit_tokens": 46336,
   "cache_miss_tokens": 7080,
   "hit_pct": 86.7
  },
  {
   "ts": "2026-09-07 18:35:56",
   "prompt_tokens": 56300,
   "cache_hit_tokens": 53504,
   "cache_miss_tokens": 2796,
   "hit_pct": 95.0
  },
  {
   "ts": "2026-09-07 18:36:16",
   "prompt_tokens": 61353,
   "cache_hit_tokens": 57856,
   "cache_miss_tokens": 3497,
   "hit_pct": 94.3
  },
  {
   "ts": "2026-09-07 18:36:51",
   "prompt_tokens": 65111,
   "cache_hit_tokens": 63232,
   "cache_miss_tokens": 1879,
   "hit_pct": 97.1
  },
  {
   "ts": "2026-09-07 18:36:56",
   "prompt_tokens": 19994,
   "cache_hit_tokens": 3072,
   "cache_miss_tokens": 16922,
   "hit_pct": 15.4
  },
  {
   "ts": "2026-09-07 18:36:59",
   "prompt_tokens": 19994,
   "cache_hit_tokens": 19968,
   "cache_miss_tokens": 26,
   "hit_pct": 99.9
  },
  {
   "ts": "2026-09-07 18:37:00",
   "prompt_tokens": 19995,
   "cache_hit_tokens": 14080,
   "cache_miss_tokens": 5915,
   "hit_pct": 70.4
  },
  {
   "ts": "2026-09-07 18:37:00",
   "prompt_tokens": 19995,
   "cache_hit_tokens": 8832,
   "cache_miss_tokens": 11163,
   "hit_pct": 44.2
  },
  {
   "ts": "2026-09-07 18:37:02",
   "prompt_tokens": 19998,
   "cache_hit_tokens": 14080,
   "cache_miss_tokens": 5918,
   "hit_pct": 70.4
  },
  {
   "ts": "2026-09-07 18:37:02",
   "prompt_tokens": 29853,
   "cache_hit_tokens": 20480,
   "cache_miss_tokens": 9373,
   "hit_pct": 68.6
  },
  {
   "ts": "2026-09-07 18:37:04",
   "prompt_tokens": 22409,
   "cache_hit_tokens": 20480,
   "cache_miss_tokens": 1929,
   "hit_pct": 91.4
  },
  {
   "ts": "2026-09-07 18:37:05",
   "prompt_tokens": 19998,
   "cache_hit_tokens": 2816,
   "cache_miss_tokens": 17182,
   "hit_pct": 14.1
  },
  {
   "ts": "2026-09-07 18:37:08",
   "prompt_tokens": 22561,
   "cache_hit_tokens": 22400,
   "cache_miss_tokens": 161,
   "hit_pct": 99.3
  },
  {
   "ts": "2026-09-07 18:37:22",
   "prompt_tokens": 32336,
   "cache_hit_tokens": 23168,
   "cache_miss_tokens": 9168,
   "hit_pct": 71.6
  },
  {
   "ts": "2026-09-07 18:37:26",
   "prompt_tokens": 34379,
   "cache_hit_tokens": 33920,
   "cache_miss_tokens": 459,
   "hit_pct": 98.7
  },
  {
   "ts": "2026-09-07 18:41:21",
   "prompt_tokens": 69663,
   "cache_hit_tokens": 13184,
   "cache_miss_tokens": 56479,
   "hit_pct": 18.9
  },
  {
   "ts": "2026-09-07 18:41:40",
   "prompt_tokens": 70936,
   "cache_hit_tokens": 70784,
   "cache_miss_tokens": 152,
   "hit_pct": 99.8
  },
  {
   "ts": "2026-09-07 18:41:46",
   "prompt_tokens": 72716,
   "cache_hit_tokens": 72576,
   "cache_miss_tokens": 140,
   "hit_pct": 99.8
  },
  {
   "ts": "2026-09-07 18:41:55",
   "prompt_tokens": 74610,
   "cache_hit_tokens": 73344,
   "cache_miss_tokens": 1266,
   "hit_pct": 98.3
  },
  {
   "ts": "2026-09-07 18:42:32",
   "prompt_tokens": 77664,
   "cache_hit_tokens": 75264,
   "cache_miss_tokens": 2400,
   "hit_pct": 96.9
  },
  {
   "ts": "2026-09-07 18:42:53",
   "prompt_tokens": 81810,
   "cache_hit_tokens": 81664,
   "cache_miss_tokens": 146,
   "hit_pct": 99.8
  },
  {
   "ts": "2026-09-07 18:43:00",
   "prompt_tokens": 19994,
   "cache_hit_tokens": 8576,
   "cache_miss_tokens": 11418,
   "hit_pct": 42.9
  },
  {
   "ts": "2026-09-07 18:43:26",
   "prompt_tokens": 19994,
   "cache_hit_tokens": 8576,
   "cache_miss_tokens": 11418,
   "hit_pct": 42.9
  },
  {
   "ts": "2026-09-07 18:43:44",
   "prompt_tokens": 19995,
   "cache_hit_tokens": 8576,
   "cache_miss_tokens": 11419,
   "hit_pct": 42.9
  },
  {
   "ts": "2026-09-07 18:44:01",
   "prompt_tokens": 19995,
   "cache_hit_tokens": 8576,
   "cache_miss_tokens": 11419,
   "hit_pct": 42.9
  },
  {
   "ts": "2026-09-07 18:44:04",
   "prompt_tokens": 29895,
   "cache_hit_tokens": 20352,
   "cache_miss_tokens": 9543,
   "hit_pct": 68.1
  },
  {
   "ts": "2026-09-07 18:44:15",
   "prompt_tokens": 19998,
   "cache_hit_tokens": 8576,
   "cache_miss_tokens": 11422,
   "hit_pct": 42.9
  },
  {
   "ts": "2026-09-07 18:44:30",
   "prompt_tokens": 19998,
   "cache_hit_tokens": 8576,
   "cache_miss_tokens": 11422,
   "hit_pct": 42.9
  },
  {
   "ts": "2026-09-07 18:45:23",
   "prompt_tokens": 85097,
   "cache_hit_tokens": 84352,
   "cache_miss_tokens": 745,
   "hit_pct": 99.1
  }
 ]
}