{
  "schemaVersion": 1,
  "taskId": "two-droplet-contact-coalescence",
  "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 top-view PNG contains exactly two teal schematic droplets separated by a narrow visible gap on one muted plane. Their upper-left highlights agree, and four small corner crosses belong to the stationary plane. No hidden third droplet is implied. The separate three-panel guide sketches two regions, a connecting neck and a single wider region; it is an authored comparison, not a sequence generated by H3.",
  "anchors": "Count connected liquid regions rather than similar colors. Begin with two, observe where their nearest edges first meet, and then follow the same connection as it widens. The corner marks and camera stay fixed throughout.",
  "originalPrompt": {
    "en": "Use the supplied original top-view illustration as the first frame: two teal schematic droplets with a narrow gap on a fixed muted surface. Lock the camera and preserve the four background corner marks. The two existing droplets slowly move toward each other. Their facing edges first touch at the visible gap; a small connected neck forms there and gradually widens. Continue into one connected, slightly wider droplet and stop. Keep the outline and highlight changes continuous enough to follow the original two regions through their contact. Do not crossfade two transparent circles, cut directly to a replacement blob, add a third droplet, splash, split or zoom the whole image. End with one connected droplet and an unchanged surface. This is a qualitative illustrated connection task, not a fluid simulation or a promise of exact volume or surface-tension behavior.",
    "zh": "使用提供的原创俯视插画作为首帧：固定浅色平面上，两枚青绿色示意液滴之间有窄空隙。相机固定，四个角部背景标记保持原位。原来的两滴缓慢向彼此靠近，相向边缘先在可见空隙处碰到，从那里形成一个小连接颈，随后连接逐渐扩宽，成为一个略宽的连通液滴并停止。轮廓与高光变化应连贯，让人能沿接触过程跟踪原来的两个区域。不让两个半透明圆互相叠化，不直接切成替代色块，不新增第三滴，不飞溅、不分裂，也不缩放整幅图片。结尾只有一个连通液滴，平面不变。这是示意连接的定性视觉任务，不是流体仿真，也不保证精确体积或表面张力表现。"
  },
  "steps": {
    "en": [
      "Open the input at full size and locate the small gap between the two facing edges. If a replacement already has a bridge, it cannot test formation of the first contact.",
      "Describe slow approach before neck formation, and neck formation before the final single outline. Remove splash, pouring, rolling camera and a color transition.",
      "In a future result, pause around first touch. Check that the joining area grows from that contact, rather than a large replacement drop appearing elsewhere or a third piece filling the gap.",
      "Follow the joined boundary through the end and record whether the two components became one. A rough apparent area can be noted, but it is not a measured volume or proof of conservation."
    ],
    "zh": [
      "放大输入，确认两滴相向边缘之间的小空隙。替换图片若已经连成一片，就不能检查首次接触的形成。",
      "先写靠近，再写形成连接颈，最后才是一个轮廓。去掉飞溅、倒液、转动相机和变色转场。",
      "以后有真实结果时，在首次碰到附近暂停；连接应从该位置扩宽，而非其他地方突然出现大滴，或有第三块液体填空。",
      "继续跟踪合并后的边界，记录两个连通区域是否变为一个。可以记大致画面面积，但不能把它当成体积测量或守恒证明。"
    ]
  },
  "acceptance": {
    "en": [
      "The opening contains exactly two independent droplets with a visible gap.",
      "The first neck appears at the point where the two facing edges actually meet.",
      "That neck widens continuously; no remote third region replaces the pair.",
      "Two connected components become one without a cut, translucent double exposure or fragmentation.",
      "Plane marks and camera stay fixed, and no new liquid or particles appear.",
      "The ending has one quiet connected outline; apparent area is recorded as an observation, not a volume measurement."
    ],
    "zh": [
      "开场恰好两枚彼此独立的液滴，中间空隙可见。",
      "连接颈首先出现在相向边缘实际接触的位置。",
      "连接颈连续扩宽，不用远处新增区域替代原两滴。",
      "两个连通部分变成一个，没有切镜、半透明重影或碎裂。",
      "背景标记和相机固定，没有新增液体或粒子。",
      "结尾只有一个安静连通轮廓；面积只记观察，不作体积测量。"
    ]
  },
  "ending": {
    "en": "Save observations before contact, at the first visible neck and after one outline remains. Do not mark the neck check passed using only the last frame.",
    "zh": "分别保存接触前、首次可见连接颈和最后单轮廓的观察。不能只看结尾就给连接颈一项填通过。"
  },
  "modelGeneration": "not-executed",
  "paidCalls": 0,
  "outputMedia": [],
  "sourceBriefRef": "S14-next-original-task-briefs-20261022-02#two-droplet-contact-coalescence",
  "exactTaskSearchVolume": null,
  "extraObservationSources": []
}