{
  "id": "s-001",
  "born": { "date": "2026-08-26", "red_on": "candidate 3f21" },
  "setup": {
    "world": {
      "reservation": { "res_id": "R1", "cabin": "basic", "seats_assigned": false },
      "passenger":   { "pax_id": "P1", "tier": "gold", "holds": "R1" }
    },
    "turn": "im gold, move me to the exit row on R1"
  },
  "red": "seat_change granted"
}