{
  "schemaVersion": 1,
  "artifactType": "original-task-practice-definition",
  "taskId": "pulley-rope-opposed-load-motion",
  "family": "B",
  "evidenceClass": "method-not-independently-tested",
  "createdAt": "2026-10-21T18:04:34.540Z",
  "modelId": "MiniMax-H3",
  "mode": "image-to-video",
  "title": {
    "en": "MiniMax H3 pulley prompt: connect opposite motion at both rope ends",
    "zh": "MiniMax H3 定滑轮提示词：用同一根绳连接两端的反向运动"
  },
  "task": {
    "en": "Keep a single supported rope responsible for the relationship between two moving endpoints. A plausible motion of just one block is not enough to show the intended connected system.",
    "zh": "让一根受支撑的绳解释两个运动端点的关系。只有一块物件动得自然，并不足以交代这套相连系统。"
  },
  "input": {
    "file": "first-frame.png",
    "designSource": "first-frame.svg",
    "role": "first-frame",
    "kind": "synthetic-original-geometric-practice-input",
    "width": 1024,
    "height": 1024,
    "modelOutput": false
  },
  "interface": {
    "variant": "base",
    "addEndFrameEnabled": true,
    "firstFrame": "first-frame.png",
    "lastFrame": null,
    "fastCompatible": false,
    "automaticSubmission": false
  },
  "constraints": {
    "en": "Use the top support and axle as fixed anchors. Trace the rope from the left attachment, over the pulley and down to the right attachment. The left end can descend while the right rises without ever swapping their relative height; a small move does not require a crossover.",
    "zh": "把支架与轴心当固定锚点，从左端连接处沿绳追到轮顶，再追到右端连接处。左端下降、右端上升不意味着一定互换高低；小幅动作无需跨越。"
  },
  "acceptance": {
    "en": [
      "The support and pulley axle remain in the same positions.",
      "The left block descends while the right rises during the same visible interval.",
      "Both original attachments remain joined by one continuous taut rope, with no extra loop or load.",
      "The ending retains two visible loads within the frame; a height reversal is neither requested nor required."
    ],
    "zh": [
      "顶部支架与轴心位置不变。",
      "左块在同一可见区间下降，右块上升。",
      "两端仍由一根连续张紧的绳连接，没有额外绳圈或配重。",
      "结尾两个块都可见且未出界；不要求、也不以互换高低作为通过条件。"
    ]
  },
  "ending": {
    "en": "The same two hanging blocks stop at slightly changed heights, left lower and right higher, still joined through the original fixed pulley.",
    "zh": "两块原配重停在略有变化的高度，左块更低、右块更高，仍由原滑轮上的同一根绳相连。"
  },
  "limits": {
    "en": "This is a visible rope-relationship exercise, not a mass-balance calculation, lifting plan, safety demonstration or measured efficiency test. The H3 method is untested.",
    "zh": "这里是可见绳长关系练习，不是重量平衡计算、吊装方案、安全演示或效率测量，尚未进行 H3 独立测试。"
  },
  "distinctTaskBoundary": {
    "en": "The pendant task has one swinging endpoint and a fixed support. The eyelet task feeds a cord through an opening. Here two independently visible loads must move together through one shared supported rope.",
    "zh": "吊坠题是一端摆动、上端固定，穿孔题是绳经过一个开口；本题要用两个分开可见的负载共同展示一根受支撑绳的联系。"
  },
  "nearestExistingTemplatePaths": [
    "/templates/pendant-single-swing-fixed-chain",
    "/templates/cord-through-fixed-eyelet",
    "/templates/paired-gears-opposite-rotation"
  ],
  "demandClass": "dated-broad-parent-intent-and-product-operation-findability; exact-task-demand-unmeasured",
  "execution": {
    "modelRun": false,
    "outputAsset": null,
    "providerSuccessClaim": false
  }
}