{
  "schemaVersion": 1,
  "artifactType": "original-task-practice-definition",
  "taskId": "paired-gears-opposite-rotation",
  "family": "B",
  "evidenceClass": "method-not-independently-tested",
  "createdAt": "2026-10-21T15:59:01.000Z",
  "modelId": "MiniMax-H3",
  "mode": "image-to-video",
  "title": {
    "en": "MiniMax H3 two-gear prompt: opposite rotation with fixed centers",
    "zh": "MiniMax H3 双齿轮提示词：中心固定，反向转动"
  },
  "task": {
    "en": "Rotate two visible schematic gears in opposite directions while their centers stay fixed. The useful task is a relationship between moving parts, not a single object spinning in place.",
    "zh": "让两只示意齿轮在中心固定的前提下反向转动。重点是多个运动部件之间的关系，不是单物体原地旋转。"
  },
  "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": "Keep both axle centers fixed. Track the two colored teeth separately and watch where the wheels meet; a convincing spinning texture is not enough if the teeth merge or the centers drift.",
    "zh": "固定两个轴心，分别跟踪彩色齿，并看两轮相遇的位置。转动纹理热闹，不代表接合正确。"
  },
  "acceptance": {
    "en": [
      "Both axle centers remain at their original positions and each wheel keeps its size.",
      "The left marked tooth moves clockwise and the right one counterclockwise.",
      "The meeting region keeps two distinguishable sets of teeth rather than a fused surface.",
      "Both wheels stop and hold without adding parts."
    ],
    "zh": [
      "两个轴心位置固定，轮盘尺寸不变。",
      "左标记顺时针，右标记逆时针。",
      "接合区仍分得清两组齿，不融成一层。",
      "两轮停下，不增加部件。"
    ]
  },
  "ending": {
    "en": "Two separate wheels stop at new tooth-mark angles on their original fixed axles.",
    "zh": "两只分离轮盘停在新的标记角度，轴心仍在原位。"
  },
  "limits": {
    "en": "The schematic and prompt do not validate involute profiles, clearance, torque transmission, tooth counts or an exact angular ratio.",
    "zh": "不验证渐开线、间隙、扭矩传递、齿数或精确角速度比。"
  },
  "distinctTaskBoundary": {
    "en": "The watch exercise moves one hand around a fixed center; this task coordinates two separate parts through a shared meeting region. Historical transformation prompts with turning gears remain broad scene references, not verified mechanical examples or this fixed-axle exercise.",
    "zh": "秒针页只绕单个中心转动，本题通过一个接合区协调两个部件。历史变身长片里的转动齿轮属于场景参考，不是机械验证或本页固定轴练习。"
  },
  "nearestExistingTemplatePaths": [
    "/templates/watch-second-hand-single-step",
    "/templates/desk-lamp-one-joint-tilt"
  ],
  "demandClass": "historical-parent-query-and-task-operation-findability; exact-task-demand-unmeasured",
  "execution": {
    "modelRun": false,
    "outputAsset": null,
    "providerSuccessClaim": false
  }
}