{
  "schemaVersion": 1,
  "taskId": "loose-knot-tighten-crossing-order",
  "creationKind": "original-geometric-illustration-and-method",
  "evidenceClass": "method-not-independently-tested",
  "firstFrameFile": "S01-first-frame.png",
  "reviewGuide": {
    "file": "review-guide.svg",
    "role": "authored intended geometry/review illustration; not a model result and not an uploaded last frame"
  },
  "inputCount": 1,
  "sourceType": "fictional-geometric-practice-not-real-product",
  "input": "The input is a flat drawing of one continuous ochre rope. Its two endpoints have distinct teal and coral caps. Three projected crossings have explicit front/back occlusion, generated from one open three-dimensional parameter path; rope-path.json records the original points and which branch is above at each crossing. The drawing is an authored loose single-knot diagram, not a reconstructed physical rope or a guarantee about hidden three-dimensional material.",
  "anchors": "Start at a colored end cap and trace the same strand through all three crossings to the other cap. An underpass is hidden behind a different part of the same strand, not a cut end. The supplied guide circles the crossing locations only; do not upload it as another frame.",
  "originalPrompt": {
    "en": "Use the supplied original loose single-knot illustration as the first frame. It contains one ochre rope with one teal end cap, one coral end cap and three already defined over-under crossings. Keep the camera and pale background fixed. Gently draw the existing ends a small distance outward along their current upper-left and upper-right exit directions. Let the same central knot become a little more compact as the free end sections extend. Keep both colored caps on the original endpoints and preserve the existing front/back order at every crossing. The rope stays one continuous strand: no cutting, solid pass-through, fused junction, exchanged crossing, extra knot or new rope. Do not untie it into a straight line or turn it into linked rings. Stop with the same slightly more compact knot and both ends visible. This is an untested visual continuity request, not a physical tying, tension or safety demonstration.",
    "zh": "使用提供的原创松单结插画作为首帧：一根赭色绳，有青绿色端帽、珊瑚色端帽，以及已经定义好的三处上下交叉。相机与浅色背景固定。沿两端当前左上和右上的出绳方向，把原有端点轻缓向外拉一小段，让同一个中央结体稍微紧凑，同时可见自由端段有所延长。两色端帽始终留在原端点，每处交叉的前后遮挡次序保持不变。绳子一直是同一条连续绳，不切断、不穿过实体绳身、不融合成分支、不交换上下次序、不新增绳结或第二根绳。不把结解成直线，也不变成互扣链环。结尾保留同一个略紧凑的单结，两端可见。这是未实测的视觉连续性要求，不是真实系结、拉力或安全演示。"
  },
  "steps": {
    "en": [
      "Before using the prompt, trace from the coral cap to the teal cap and check the three over-under relationships against the separate guide. If you redraw the source and cannot follow one continuous route, stop and fix the drawing first.",
      "Move the original two ends a small distance outward along their existing upper-left and upper-right exit directions. Ask for the current knot body to become more compact, rather than creating an extra loop.",
      "For a future clip, pause at each crossing while the central body contracts. Compare which branch is in front; a smooth-looking final knot is insufficient if a strand passed through another in the middle.",
      "Compare end lengths and the fixed canvas. Shortening the central knot should be accompanied by visible change along the free end sections, not a global camera zoom. Stop before making claims about tension, strength or a physically tight endpoint."
    ],
    "zh": [
      "使用前从珊瑚色端帽追到青绿色端帽，逐处对照三处上下遮挡。自行重画后若无法沿同一条路线追通，应先停下修图。",
      "沿原有左上、右上出绳方向，把原两端各向外轻缓拉一小段。要求现有结体更紧凑，不新增绳圈。",
      "以后检查实际片段时，在中央结体缩紧的过程中逐处暂停；前景绳段不能变成下穿段。末尾看似漂亮，不能掩盖中途穿过绳身。",
      "比较两侧端段与固定画布。中央缩紧应伴随可见端段调整，不能由全画面缩放代替；不进一步声称张力、强度或真实勒紧端点。"
    ]
  },
  "acceptance": {
    "en": [
      "Exactly two original colored end caps remain on the same continuous strand.",
      "Each original over-under crossing keeps its front/back order during motion.",
      "No visible branch cuts, fuses or passes through the solid rope at a crossing.",
      "The central knot becomes modestly more compact while free end sections visibly adjust.",
      "The canvas and camera stay fixed; whole-image scaling is not counted as tightening.",
      "The ending is the same single knot with two ends, not a new knot, chain, bag opening or straight cord."
    ],
    "zh": [
      "始终只有原来的两个有色端帽，连在同一根连续绳上。",
      "每处已有交叉在运动中保持原来的前后次序。",
      "交叉处没有切断、融合或实体绳段互相穿过。",
      "中央结体只小幅紧凑，可见自由端段随之调整。",
      "画布和相机固定，不把整幅缩放算作收紧。",
      "结尾仍是原来的单结和两端，不变成新结、链条、袋口或直绳。"
    ]
  },
  "ending": {
    "en": "Keep a note for each of the three crossings and for both end caps. The supplied route is source geometry for review, not a measured path recovered from a generated clip.",
    "zh": "为三处交叉和两个端帽分别留记录。随包路径只是供核对的作者几何源，不是从生成结果测出的运动路线。"
  },
  "modelGeneration": "not-executed",
  "paidCalls": 0,
  "outputMedia": [],
  "sourceBriefRef": "S14-next-original-task-briefs-20261022-02#loose-knot-tighten-crossing-order",
  "exactTaskSearchVolume": null,
  "extraObservationSources": [
    "rope-path.json"
  ]
}