{
 "id": "B11-B",
 "counterpart": "B11-A",
 "genre": "sailing",
 "interaction_family": "trigger_mechanism",
 "initial_scene": {
  "description": "a ship helm deck in steady daylight, a large wooden ship wheel on its stand, a thick rolled-up canvas sail bundle firmly lashed to the horizontal yard arm high on the mast, and a bow beacon lamp with dark matte glass a single sailor seen in third person from behind, standing in place at the wheel with both hands on the spokes",
  "third_person_player": true,
  "player_pose_and_item": "a single sailor seen in third person from behind, standing in place at the wheel with both hands on the spokes",
  "action_target": "the large ship wheel",
  "other_key_objects": [
   "ship_wheel",
   "main_sail",
   "bow_beacon"
  ],
  "shared_visual_state": [
   "the main sail is a thick rolled-up canvas bundle lashed to the yard arm",
   "the bow beacon lamp is dark matte glass with no glow"
  ],
  "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/B11.png"
 },
 "hidden_state": {
  "variable": "nav_mode",
  "A": "SAIL",
  "B": "BEACON",
  "visible_in_initial_frame": false
 },
 "rule": {
  "text": "If the nav_mode is SAIL, the main sail spreads fully out; if it is BEACON, the bow beacon glows strong green.",
  "precondition": "nav_mode == 'SAIL'",
  "effect": "sail.unfurled = true",
  "else_effect": "beacon.green = true",
  "mapping": {
   "SAIL": "sail.unfurled = true",
   "BEACON": "beacon.green = true"
  }
 },
 "shared_action": "The large ship wheel clearly rotates clockwise by about a quarter turn.",
 "instruction": "Preserve the first frame. nav_mode = BEACON, so the resolved rule is: the bow beacon glows strong green. Action: The large ship wheel clearly rotates clockwise by about a quarter turn. Show the action, then exactly this consequence: the bow beacon glows strong green The counter-outcome must NOT happen at any point: the main sail is fully spread. Instead, the main sail is a thick rolled-up canvas bundle lashed to the yard arm 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
  },
  "beacon": {
   "green": false
  },
  "nav_mode": "BEACON"
 },
 "gold_end_state": {
  "sail.unfurled": false,
  "beacon.green": true
 },
 "delta": {
  "beacon.green": true
 },
 "visual_vocab": {
  "sail.unfurled": {
   "false": "the main sail is a thick rolled-up canvas bundle lashed to the yard arm",
   "true": "the main sail is fully spread"
  },
  "beacon.green": {
   "false": "the bow beacon lamp is dark matte glass with no glow",
   "true": "the bow beacon glows strong green"
  }
 },
 "gold_A": "the main sail spreads fully out",
 "gold_B": "the bow beacon glows strong green",
 "terminal_visual_states": {
  "occurs": {
   "variable": "beacon.green",
   "value": true,
   "phrase": "the bow beacon glows strong green",
   "judge_label": "the beacon glows green",
   "in_final_frame": true
  },
  "not_occurs": {
   "variable": "sail.unfurled",
   "value": true,
   "phrase": "the main sail is fully spread",
   "judge_label": "the sail is spread",
   "in_final_frame": false,
   "instead_remains": "the main sail is a thick rolled-up canvas bundle lashed to the yard arm"
  }
 },
 "prompt_ok": [
  "SAIL",
  "BEACON"
 ],
 "judge": {
  "initial_questions": [
   {
    "question": "Is it true that the player stands with both hands on the ship wheel?",
    "statement": "the player stands with both hands on the ship wheel",
    "answers": [
     "yes",
     "no"
    ],
    "expected": "yes"
   },
   {
    "question": "Is it true that the rolled-up sail bundle is lashed to the yard arm?",
    "statement": "the rolled-up sail bundle is lashed to the yard arm",
    "answers": [
     "yes",
     "no"
    ],
    "expected": "yes"
   }
  ],
  "action_question": {
   "question": "Did the ship wheel clearly rotate?",
   "answers": [
    "yes",
    "no"
   ],
   "expected": "yes"
  },
  "outcome_question": {
   "question": "At the end, is the main sail spread, or the beacon glowing green?",
   "answers": [
    "the sail is spread",
    "the beacon glows green",
    "unclear"
   ],
   "expected": "the beacon glows green",
   "not_expected": "the sail is spread"
  }
 },
 "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"
}