{
  "schemaVersion": 1,
  "slug": "elastic-ring-over-taper-recover",
  "ownerPath": "/templates/elastic-ring-over-taper-recover",
  "semanticKey": "one closed annulus expands around a tapered collar then contracts around a narrower stem without opening",
  "demand": {
    "type": "independent-product-lookup-value",
    "historicalExactQuery": null,
    "exactSearchVolume": null,
    "rationale": "Keep a closed loop identifiable while its opening changes to pass an obstacle. The ring must widen around the tapered body, clear its widest collar and narrow again around the lower stem. A slit, disappearing back half or uniformly shrinking scene would avoid the actual constraint.",
    "status": "author-proposed; independent admission pending"
  },
  "input": "first-frame.png",
  "inputRoles": {
    "first-frame": "one authored PNG",
    "last-frame": null,
    "guide": "review only; do not upload"
  },
  "constraints": [
    "The mandrel tip, collar and lower stem remain fixed and unchanged.",
    "The ring opening widens before it passes the widest collar.",
    "One closed band persists without a slit, free ends or an extra ring.",
    "The front/back overlap remains consistent while the ring descends.",
    "The coral mark stays attached to the same ring region through expansion and recovery.",
    "Recovery occurs below the collar, and the final ring still surrounds the narrower stem."
  ],
  "steps": [
    "Locate the collar and the narrower stem below it. A simple cone with no narrower region would not support the requested recovery-after-clearance ending.",
    "Request one downward pass. Describe gradual widening along the taper before clearance, then narrowing only after the entire ring is below the collar. Keep it around the stem.",
    "In a future result, inspect the front and visible side arcs during maximum opening. Track the coral dot after recovery and check that a hidden rear arc has not become an invented break or extra free end."
  ],
  "nearestOwners": [
    "/templates/sponge-compress-release-shape",
    "/templates/drawstring-gather-opening"
  ],
  "substantiveDifference": "The sponge changes a solid volume between pads, while the drawstring gathers a fabric mouth using two free cord ends. This original input is a closed annulus with no ends, and its hole must clear a fixed collar before recovering around a different shaft section.",
  "modelExecution": {
    "performed": false,
    "taskId": null,
    "result": null,
    "paidCalls": 0
  },
  "sourceType": "original-local-deterministic-illustration",
  "rights": "Original authored geometry and prose; no third-party media. Independent review pending."
}