{
  "schemaVersion": 1,
  "slug": "perforated-sheet-progressive-tear",
  "ownerPath": "/templates/perforated-sheet-progressive-tear",
  "semanticKey": "one prestarted crack advances through bridges on a perforated line while two sides separate",
  "demand": {
    "type": "independent-product-lookup-value",
    "historicalExactQuery": null,
    "exactSearchVolume": null,
    "rationale": "Make the moving tear front, rather than a cut transition, explain separation. The starting sheet already has a short open split and a visible perforation line. The task is to continue that split through the remaining bridges until two pieces exist.",
    "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 broad sheet and its two left clamps remain fixed.",
    "The tear begins at the existing starter split and reaches consecutive bridges along the same line.",
    "New open edges appear behind a moving front; the entire seam does not open at once.",
    "Material ahead of the front stays connected until the front reaches it.",
    "No new off-route crack or detached fragment appears.",
    "The ending contains exactly two paper pieces with corresponding facing edges."
  ],
  "steps": [
    "Inspect the first intact bridge immediately below the starter split. The input must show both the opened segment and the connected remainder; a fully detached strip has no tear left to demonstrate.",
    "Request one continuous rightward pull with the split extending downward along the perforation. Keep the central sheet in place and exclude scissors, hands and adhesive peeling.",
    "For later review, record at least two advancing front positions before full separation. Check that each new gap appears at the current front, not simultaneously along the whole seam."
  ],
  "nearestOwners": [
    "/templates/scissors-one-snip-paper-separation",
    "/templates/peel-label-progressive-contact-boundary"
  ],
  "substantiveDifference": "Scissors make a localized separation at a tool contact; label peeling preserves one sheet while its adhesion boundary moves. Here no tool or backing exists: a material crack progresses across original bridges and changes one sheet into two pieces.",
  "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.",
  "revision": {
    "id": "wave1-r3",
    "reason": "Rename landmark at (647,493) from last-bridge to last-perforation because it lies within the final punched opening. Input PNG/SVG/geometry, owner and prompts unchanged."
  },
  "inputBinding": {
    "pngSha256": "b4384539a3c53863f1feaf862b495e8cbb94516193e493661a9953af176fe9a8",
    "geometrySha256": "a36f9d40d4958c7c2e4faf95f584f0c16070a182631e0acc48077df7a539ef49",
    "landmarksSha256": "cfa576c00ae43ad13e2f5d2cfa091da673d05d6d107d881dc9ff830de3edd62c",
    "reviewGuideSha256": "5edaa75e20b5f1ca5b00680d362b0756bc587664fe3e5c843420f902c717b761"
  }
}