{
  "schemaVersion": 1,
  "artifactType": "original-task-practice-definition",
  "taskId": "conveyor-parcel-contact-transport",
  "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 conveyor prompt: carry a parcel with its moving support",
    "zh": "MiniMax H3 传送带提示词：物件随支撑面走，自己不滚动"
  },
  "task": {
    "en": "Separate a moving support surface from a fixed machine frame. The parcel should travel because it remains supported by the moving top belt, without rolling itself or being followed by the camera.",
    "zh": "分清移动的支撑表面和静止的机架。物件应因持续受上层带面支撑而向前走，不是自己滚动，也不是相机追着它移动。"
  },
  "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": "Track the end-roller axles and legs as fixed anchors, not the rotating roller surfaces. Compare the parcel bottom with nearby top-belt marks. The destination is still on the belt, before the right edge.",
    "zh": "以两端轴心和支腿作固定锚点，不把允许转动的滚轮表面当静止点。比较包底与附近带面标记；终点仍在带上，位于右端边缘之前。"
  },
  "acceptance": {
    "en": [
      "The machine legs, frame and both roller axles stay fixed in the shot.",
      "Top-belt marks and the parcel advance toward frame right over the same interval.",
      "The parcel remains upright and supported, without obvious backward slip, rolling or a gap below it.",
      "The same single parcel stops before the belt edge; no drop, duplication or loop reset occurs."
    ],
    "zh": [
      "支脚、机架和两端轴心在镜头里保持原位。",
      "上层带面标记和方包在同一时间向右前进。",
      "方包保持直立和受支撑，没有明显后滑、滚动或底部空隙。",
      "同一个方包停在带边之前，没有掉落、复制或循环复位。"
    ]
  },
  "ending": {
    "en": "The original upright parcel rests farther right on the same belt, still fully supported and short of the edge. The machine frame remains where it started.",
    "zh": "原来的直立方包在同一带面上向右挪了一段，仍完全受到支撑且未到边缘，机架留在原位。"
  },
  "limits": {
    "en": "This checks visible support and relative motion, not belt traction, load capacity, industrial safety or a friction coefficient. It is an untested H3 teaching method.",
    "zh": "这里只检查可见支撑与相对运动，不验证牵引力、载重、工业安全或摩擦系数，尚未在 H3 上独立测试。"
  },
  "distinctTaskBoundary": {
    "en": "The tracking-walk task moves the camera, the rolling-cylinder task rotates the transported body, and placement ends on a fixed surface. This task keeps the camera fixed and carries a nonrotating body on a moving support.",
    "zh": "跟随走路题移动相机，圆柱滚动题让被运物自己转动，放置题落在静止表面；这里固定相机，让移动支撑面带着不旋转的物体前进。"
  },
  "nearestExistingTemplatePaths": [
    "/templates/tracking-walk-constant-direction",
    "/templates/cylinder-roll-translate-rotate",
    "/templates/hand-place-object-on-table"
  ],
  "demandClass": "dated-broad-parent-intent-and-product-operation-findability; exact-task-demand-unmeasured",
  "execution": {
    "modelRun": false,
    "outputAsset": null,
    "providerSuccessClaim": false
  }
}