{
  "schema": 1,
  "event": "advance",
  "update": 9876,
  "from_stage": 27,
  "to_stage": 28,
  "curriculum_schedule": "v10",
  "win_rate": 0.975,
  "conversion_rate": 0.975,
  "death_rate": 0.025,
  "window_size": 40,
  "win_gate": 0.95,
  "from": {
    "maps": [
      "Onion"
    ],
    "bots": 24,
    "nations": "4",
    "difficulty": "Easy",
    "decision_ticks": 15,
    "win_at": 0.95
  },
  "to": {
    "maps": [
      "Onion"
    ],
    "bots": 26,
    "nations": "4",
    "difficulty": "Easy",
    "decision_ticks": 15,
    "win_at": 0.95
  },
  "summary": "Advanced stage 27→28 at update 9876 (WR=97.5% vs gate 95.0%; DR=2.5%; CR=97.5%). Onion bots=24 nations=4 Easy → Onion bots=26 nations=4 Easy."
}