{
  "schemaVersion": 1,
  "title": "OptiPacker single-layer packing experiment",
  "model": "jev-1.13.0",
  "scope": {
    "parts": "Identical parts represented by occupied square cells.",
    "placement": "One 10 mm-thick layer on a 10 mm placement lattice.",
    "rotations": "In-plane quarter turns; the half-turn fixture permits only 0 and 180 degrees.",
    "clearance": "Square-buffer part clearance and wall margins declared per fixture.",
    "utilization": "Occupied part volume divided by the full single-layer container volume.",
    "upperBound": "Minimum of requested quantity and usable area divided by part area. Clearance and tileability can make this bound unattainable.",
    "playback": "The robot animation replays completed layouts. Playback speed is separate from solver runtime.",
    "application": "Mesh footprint extraction, mixed parts, vertical packing and loading-path constraints require separate integration."
  },
  "methods": {
    "grid": {
      "description": "Uniform bounding-box grid using the production grid-count helper."
    },
    "geometry": {
      "description": "Shape-aware geometric beam search from the wider-search controls.",
      "beamWidth": 8,
      "branchLimit": 8
    },
    "jev": {
      "description": "First recorded Jev-guided beam-selection trial.",
      "beamWidth": 4,
      "branchLimit": 8,
      "repeat": 1
    }
  },
  "runtimeScope": "Recorded runtime includes placement generation, search and final layout validation. Jev runtime includes network latency. Geometric measurements follow an excluded warmup run.",
  "sourceNote": "Public fixture definitions and result fields derived from the final experiment and follow-up wider geometric controls. The controls were added after observing the original asymmetric-L gain.",
  "sources": [
    {
      "path": "tasks/experiments/jev-packing-final/results.json",
      "contents": "Fixtures, grid results, first Jev trial per fixture, and Jev runtime means and packed counts across three trials."
    },
    {
      "path": "tasks/experiments/jev-packing-controls/results.json",
      "contents": "Geometric ranking results with beam width 8 and branch limit 8."
    }
  ],
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      "cellMm": 10,
      "thicknessMm": 10,
      "gapCells": 0,
      "wallCells": 0,
      "rotations": [
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        90,
        180,
        270
      ],
      "id": "l-small",
      "shape": [
        "#.",
        "##"
      ],
      "widthCells": 6,
      "heightCells": 4,
      "requested": 8
    },
    {
      "cellMm": 10,
      "thicknessMm": 10,
      "gapCells": 0,
      "wallCells": 0,
      "rotations": [
        0,
        90,
        180,
        270
      ],
      "id": "l-thin",
      "shape": [
        "#..",
        "#..",
        "###"
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      "widthCells": 6,
      "heightCells": 5,
      "requested": 6
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    {
      "cellMm": 10,
      "thicknessMm": 10,
      "gapCells": 0,
      "wallCells": 0,
      "rotations": [
        0,
        90,
        180,
        270
      ],
      "id": "l-asymmetric",
      "shape": [
        "#...",
        "#...",
        "####"
      ],
      "widthCells": 8,
      "heightCells": 6,
      "requested": 8
    },
    {
      "cellMm": 10,
      "thicknessMm": 10,
      "gapCells": 0,
      "wallCells": 0,
      "rotations": [
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        180
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      "id": "l-half-turns",
      "shape": [
        "#..",
        "#..",
        "###"
      ],
      "widthCells": 7,
      "heightCells": 5,
      "requested": 7
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    {
      "cellMm": 10,
      "thicknessMm": 10,
      "gapCells": 1,
      "wallCells": 1,
      "rotations": [
        0,
        90,
        180,
        270
      ],
      "id": "l-clearance",
      "shape": [
        "#.",
        "##"
      ],
      "widthCells": 9,
      "heightCells": 8,
      "requested": 8
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    {
      "cellMm": 10,
      "thicknessMm": 10,
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      "rotations": [
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      "id": "rectangle-control",
      "shape": [
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