{
 "date": "2026-09-13",
 "exp": "mid-section defect: chained-dup vs GT-heavy-ghost",
 "shuffle_seed": 202609134,
 "arm_of": {
  "甲": "v62",
  "乙": "v63"
 },
 "files": {
  "甲": "bta_mid_A.mp4",
  "乙": "bta_mid_B.mp4"
 },
 "context": "回环投票已定谳(v6.2胜). 本题只审中段(约4-17s): 甲=链式想象区(桌椅复制) 乙=GT锚直拼(缝鬼影重)"
}