{
  "blueprintId": "expansion-056",
  "slug": "hand-place-object-on-table",
  "language": "en",
  "mode": "image-to-video",
  "modelId": "MiniMax-H3",
  "evidenceClass": "original-practice-method-not-model-tested",
  "primaryInput": "/learning-assets/pseo-expansion70-20261014/hand-place-object-on-table/first-frame.png",
  "inputPolicy": "Upload only the clean first frame; diagram is for review.",
  "title": "Hand places an object: contact before release",
  "description": "Practice a single cube placement with an original hand-and-table input and separate checks for landing, finger release and object stability.",
  "goal": "Bring the teal cube to the tabletop, establish contact, release the grip and withdraw the hand while the cube remains. The task evaluates visible contact order, without claiming a physically simulated grasp.",
  "preparation": [
    "Use the supplied hand-and-cube illustration as the starting image. For a replacement, keep the fingers, cube base and intended table area unobstructed.",
    "Choose a plain rigid object with a simple outline. Avoid transparent glass, dangling straps or a printed label until the contact sequence can be reviewed.",
    "Leave an empty landing area on the visible tabletop. The hand must have room to clear the cube without exiting through it or revealing an unknown surface.",
    "Only the hand and held cube move; the table and camera remain fixed. The clean first frame contains no landing target or arrows; the diagram carries the review guides."
  ],
  "prompt": "Start from the uploaded scene showing one hand holding the teal cube above the wooden table. Lower the cube gently until its flat base meets the visible tabletop. Keep the fingers holding it until contact is established, then open the fingers and withdraw the hand toward frame left. The cube remains upright in the same landing position after release. Keep the cube’s size and solid outline unchanged and keep the table and camera fixed. Show one placement only, ending with a clear gap between the resting cube and the hand.",
  "steps": [
    {
      "title": "Locate the landing surface",
      "body": "Name the visible tabletop and leave it empty. Compare the initial cube base to that surface so a floating ending is easier to identify."
    },
    {
      "title": "Order landing and release",
      "body": "Write the base contact before opening fingers. A generic “put it down” gives fewer observable stages to diagnose if the cube falls or the hand vanishes."
    },
    {
      "title": "Inspect the first separation",
      "body": "Pause when a gap appears between fingers and cube. Check that the base is already supported and that the fingertips neither fuse with the side nor cut through the top."
    },
    {
      "title": "Follow the cube after withdrawal",
      "body": "Watch the last interval with the hand clear. Keep the cube’s position, orientation and count under review; a correct-looking landing can be followed by a slide or duplicate."
    }
  ],
  "acceptance": [
    "Exactly one cube remains visible throughout the placement.",
    "The cube base visibly reaches the tabletop before the grip opens.",
    "The fingers retain a coherent shape during contact and separation.",
    "The hand does not pass through a face of the cube.",
    "The cube remains upright without changing dimensions after release.",
    "The table edge and landing area remain fixed.",
    "A clear final gap separates the withdrawn hand and the stationary cube."
  ],
  "troubleshooting": [
    {
      "symptom": "The cube is released while still floating",
      "change": "Change only the order sentence: maintain the grip until the base meets the table. Recheck contact before adding any faster movement."
    },
    {
      "symptom": "Fingers melt into the cube",
      "change": "Reduce only the grip-opening amplitude and ask the hand to clear sideways; inspect the first separation frame rather than only the ending."
    },
    {
      "symptom": "The cube follows the retreating hand",
      "change": "Strengthen only the post-release resting state. Keep the same landing location and compare whether the cube moves after the fingers have opened."
    }
  ],
  "ending": "Finish with the cube resting alone on the table and the hand visibly clear. Save the first-contact and first-separation observations; they explain the failure more precisely than a general realism score.",
  "assetCaption": "Original illustrated practice input and separate observation diagram. These are authored teaching assets, not a MiniMax H3 output or a model-tested result."
}