{
 "id": "B48-A",
 "counterpart": "B48-B",
 "genre": "sailing",
 "interaction_family": "trigger_gesture",
 "initial_scene": {
  "description": "a ship deck in steady daylight, the main sail furled and tied to its yard, and a large wooden water wheel on the ship's side standing still in the water a single sailor seen in third person from behind, standing in place at mid-deck",
  "third_person_player": true,
  "player_pose_and_item": "a single sailor seen in third person from behind, standing in place at mid-deck",
  "action_target": "the player's two-arm command",
  "other_key_objects": [
   "main_sail",
   "side_water_wheel"
  ],
  "shared_visual_state": [
   "the main sail is furled and tied to the yard",
   "the large side water wheel stands still"
  ],
  "camera": "locked third-person, fixed framing",
  "style": "stylized 3D third-person adventure game environment, clean uncluttered composition, readable silhouettes, medium-wide fixed gameplay camera, soft cool-neutral ambient lighting, restrained materials, no HUD, no subtitles, no readable text",
  "keyframe": "frames/B48.png"
 },
 "hidden_state": {
  "variable": "ship_mode",
  "A": "SAIL",
  "B": "WHEEL",
  "visible_in_initial_frame": false
 },
 "rule": {
  "text": "If the ship_mode is SAIL, the main sail spreads fully out; if it is WHEEL, the side water wheel spins fast.",
  "precondition": "ship_mode == 'SAIL'",
  "effect": "sail.unfurled = true",
  "else_effect": "wheel.spinning = true",
  "mapping": {
   "SAIL": "sail.unfurled = true",
   "WHEEL": "wheel.spinning = true"
  }
 },
 "shared_action": "The player stays in place and makes one clear forward command gesture with both arms.",
 "instruction": "Preserve the first frame. ship_mode = SAIL, so the resolved rule is: the main sail spreads fully out. Action: The player stays in place and makes one clear forward command gesture with both arms. Show the action, then exactly this consequence: the main sail spreads fully out The counter-outcome must NOT happen at any point: the large side water wheel spins fast. Instead, the large side water wheel stands still throughout the clip. Hold the final state for about the last second. One continuous 3-second third-person clip, fixed camera, no HUD, no subtitles, no readable text.",
 "initial_state": {
  "sail": {
   "unfurled": false
  },
  "wheel": {
   "spinning": false
  },
  "ship_mode": "SAIL"
 },
 "gold_end_state": {
  "sail.unfurled": true,
  "wheel.spinning": false
 },
 "delta": {
  "sail.unfurled": true
 },
 "visual_vocab": {
  "sail.unfurled": {
   "false": "the main sail is furled and tied to the yard",
   "true": "the main sail is fully spread"
  },
  "wheel.spinning": {
   "false": "the large side water wheel stands still",
   "true": "the large side water wheel spins fast"
  }
 },
 "gold_A": "the main sail spreads fully out",
 "gold_B": "the side water wheel spins fast",
 "terminal_visual_states": {
  "occurs": {
   "variable": "sail.unfurled",
   "value": true,
   "phrase": "the main sail is fully spread",
   "judge_label": "the sail is spread",
   "in_final_frame": true
  },
  "not_occurs": {
   "variable": "wheel.spinning",
   "value": true,
   "phrase": "the large side water wheel spins fast",
   "judge_label": "the wheel spins",
   "in_final_frame": false,
   "instead_remains": "the large side water wheel stands still"
  }
 },
 "prompt_ok": [
  "SAIL",
  "WHEEL"
 ],
 "judge": {
  "initial_questions": [
   {
    "question": "Is it true that the player stands at mid-deck?",
    "statement": "the player stands at mid-deck",
    "answers": [
     "yes",
     "no"
    ],
    "expected": "yes"
   },
   {
    "question": "Is it true that the sail is furled and the water wheel is still?",
    "statement": "the sail is furled and the water wheel is still",
    "answers": [
     "yes",
     "no"
    ],
    "expected": "yes"
   }
  ],
  "action_question": {
   "question": "Did the player make one clear two-arm command gesture?",
   "answers": [
    "yes",
    "no"
   ],
   "expected": "yes"
  },
  "outcome_question": {
   "question": "At the end, is the sail spread, or the water wheel spinning?",
   "answers": [
    "the sail is spread",
    "the wheel spins",
    "unclear"
   ],
   "expected": "the sail is spread",
   "not_expected": "the wheel spins"
  }
 },
 "constraints": {
  "identical_initial_frame": true,
  "hidden_state_not_visually_leaked": true,
  "same_action_across_twins": true,
  "both_outcomes_change": true,
  "one_action_per_chunk": true,
  "duration_seconds": "2-5"
 },
 "input_image": "input.png"
}