{
  "version": 3,
  "architecture": "424 \u2192 96 ReLU \u2192 2",
  "parameters": 40994,
  "weightBytes": 163976,
  "modelSha256": "931fa7d10cc2ba4dacb6a4f43d8a2e31284dd39137bb8f8dfea47a1c511caec0",
  "datasetSha256": "1da6c0521f51aaec4e3ea5e960080abed193ef73309c15c39dad8162dd7f48f6",
  "counts": {
    "train": 800,
    "validation": 192,
    "holdout": 256
  },
  "trainFamilies": [
    "paired-columns",
    "transverse-baffles",
    "framed-lookout",
    "offset-niche",
    "long-stacks",
    "perimeter-stacks",
    "ring-court",
    "cross-court"
  ],
  "heldoutFamilies": [
    "radial-machine",
    "split-vista",
    "reading-island",
    "offset-court"
  ],
  "checkpointSelection": "Lowest NLL on validation seeds from training families only",
  "selectedEpoch": 17,
  "exactTrainHoldoutGeometryOverlap": 0,
  "runtime": "Node v26.10.0; compact CPU JavaScript on the development Mac. Not browser/device latency.",
  "comparison": {
    "previous": "Original v2 weights, same architecture and bounded sampler",
    "retrained": "Composition v3 weights, same architecture and bounded sampler",
    "procedural": "Purpose-only baseline selects only the eight training grammars using the same purpose, routes and annotations. Never selects a held-out grammar.",
    "proceduralGated": "The same purpose-only procedural baseline with the same declared composition proxy and up to sixteen attempts. Provides an equally validated procedural comparison.",
    "delivered": "V3 with bounded rejection using the declared composition proxy, then explicit procedural fallback. An engineered delivery policy, not an improvement in learned raw capability.",
    "authoredReference": "Privileged family-aware authored target, included as an upper reference; it knows the held-out family grammar."
  },
  "protocol": "Frozen eight training families, same-family validation for checkpoint selection, four held-out families evaluated only after checkpoint selection. Same 256 held-out design conditions and seeds for all methods. Sightline is cleared by procedural code but is not part of the neural reservation mask. Raw neural validity is reported separately from retries and fallback.",
  "proxyDefinition": "Intention proxy = connected floors, protected clearance, visible focal point, clear optional discovery, and wall density in a predeclared purpose band. This is an engineering proxy, not an atmosphere or enjoyment score.",
  "purposeWallDensityBands": {
    "machine hall": [
      0.07,
      0.4
    ],
    "observation room": [
      0.07,
      0.4
    ],
    "archive": [
      0.12,
      0.48
    ],
    "signal court": [
      0.1,
      0.44
    ]
  },
  "summary": {
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      "rooms": 256,
      "connected": 256,
      "clearance": 256,
      "visibleFocal": 142,
      "discoveryClear": 256,
      "densityWithinPurposeBand": 130,
      "intentionProxyPass": 70,
      "meanWallDensity": 0.08916558159722221,
      "meanIsolatedWallFraction": 0.23393599218133762,
      "rawConnected": 255,
      "rawVisibleFocal": 142,
      "fallbacks": 0,
      "meanAttempts": 1.00390625,
      "heldoutTileNll": 1.4086505488881145,
      "generationMsP50": 1.1307080000001406,
      "generationMsP95": 1.2622080000001006,
      "uniqueGeometries": 255,
      "notExactTrainingMatch": 256
    },
    "retrained": {
      "rooms": 256,
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      "clearance": 256,
      "visibleFocal": 153,
      "discoveryClear": 256,
      "densityWithinPurposeBand": 194,
      "intentionProxyPass": 101,
      "meanWallDensity": 0.1485731336805555,
      "meanIsolatedWallFraction": 0.20440801857271995,
      "rawConnected": 216,
      "rawVisibleFocal": 157,
      "fallbacks": 2,
      "meanAttempts": 1.3046875,
      "heldoutTileNll": 0.41724576649141726,
      "generationMsP50": 1.1743750000000546,
      "generationMsP95": 3.4977499999999964,
      "uniqueGeometries": 256,
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    "delivered": {
      "rooms": 256,
      "connected": 256,
      "clearance": 256,
      "visibleFocal": 256,
      "discoveryClear": 256,
      "densityWithinPurposeBand": 256,
      "intentionProxyPass": 256,
      "meanWallDensity": 0.15581597222222218,
      "meanIsolatedWallFraction": 0.13789011895352032,
      "proceduralFallbacks": 25,
      "meanNeuralAttempts": 3.4140625,
      "generationMsP50": 3.2259579999999914,
      "generationMsP95": 9.407624999999996,
      "uniqueGeometries": 256,
      "notExactTrainingMatch": 256
    },
    "procedural": {
      "rooms": 256,
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      "visibleFocal": 256,
      "discoveryClear": 256,
      "densityWithinPurposeBand": 228,
      "intentionProxyPass": 228,
      "meanWallDensity": 0.17559136284722224,
      "meanIsolatedWallFraction": 0.03391293838257804,
      "generationMsP50": 0.05375000000003638,
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      "uniqueGeometries": 256,
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    "proceduralGated": {
      "rooms": 256,
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      "visibleFocal": 256,
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      "densityWithinPurposeBand": 256,
      "intentionProxyPass": 256,
      "meanWallDensity": 0.18893771701388884,
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      "discoveryClear": 256,
      "densityWithinPurposeBand": 182,
      "intentionProxyPass": 182,
      "meanWallDensity": 0.14716254340277782,
      "meanIsolatedWallFraction": 0.03989824049623939
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  },
  "byFamily": {
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      "delivered": {
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        "proceduralFallbacks": 5,
        "meanNeuralAttempts": 3.125,
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        "generationMsP95": 8.978165999999987,
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        "rooms": 64,
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        "densityWithinPurposeBand": 49,
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        "meanWallDensity": 0.14854600694444445,
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      "proceduralGated": {
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        "generationMsP50": 0.06341700000001538,
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        "uniqueGeometries": 64,
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        "densityWithinPurposeBand": 32,
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        "meanWallDensity": 0.08257378472222221,
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        "meanWallDensity": 0.16286892361111108,
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        "generationMsP50": 0.05420800000001691,
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        "densityWithinPurposeBand": 36,
        "intentionProxyPass": 36,
        "meanWallDensity": 0.09016927083333336,
        "meanIsolatedWallFraction": 0.03059275793650794
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    },
    "reading-island": {
      "previous": {
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        "connected": 64,
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        "visibleFocal": 32,
        "discoveryClear": 64,
        "densityWithinPurposeBand": 8,
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        "rawConnected": 64,
        "rawVisibleFocal": 32,
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      "retrained": {
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        "densityWithinPurposeBand": 47,
        "intentionProxyPass": 25,
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        "meanWallDensity": 0.22536892361111116,
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    "offset-court": {
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        "uniqueGeometries": 64,
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      "delivered": {
        "rooms": 64,
        "connected": 64,
        "clearance": 64,
        "visibleFocal": 64,
        "discoveryClear": 64,
        "densityWithinPurposeBand": 64,
        "intentionProxyPass": 64,
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        "proceduralFallbacks": 4,
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        "uniqueGeometries": 64,
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      },
      "procedural": {
        "rooms": 64,
        "connected": 64,
        "clearance": 64,
        "visibleFocal": 64,
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        "densityWithinPurposeBand": 55,
        "intentionProxyPass": 55,
        "meanWallDensity": 0.17003038194444445,
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        "generationMsP50": 0.05429099999992104,
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        "uniqueGeometries": 64,
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      },
      "proceduralGated": {
        "rooms": 64,
        "connected": 64,
        "clearance": 64,
        "visibleFocal": 64,
        "discoveryClear": 64,
        "densityWithinPurposeBand": 64,
        "intentionProxyPass": 64,
        "meanWallDensity": 0.1833767361111111,
        "meanIsolatedWallFraction": 0.012090311137804493,
        "generationMsP50": 0.053167000000030384,
        "generationMsP95": 0.18666600000005928,
        "uniqueGeometries": 64,
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      },
      "authoredReference": {
        "rooms": 64,
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        "clearance": 64,
        "visibleFocal": 64,
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        "densityWithinPurposeBand": 57,
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        "meanWallDensity": 0.1796875,
        "meanIsolatedWallFraction": 0.028415381522915534
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    }
  },
  "limitations": [
    "The procedural method uses explicit look and focal coordinates. The fixed neural feature contract encodes route and clearance effects in its mask, without separate look/focal coordinate channels; this limits the comparison and is a candidate for a future input revision.",
    "Only four held-out synthetic design families; seed variations are not independent human designs.",
    "Purpose is a four-way input. Family names, prose, landmarks and transformation semantics are not language inputs.",
    "Procedural geometry explicitly preserves the entry view; neural output must learn it. Hard routes and clearance are imposed for both.",
    "Novel exact geometry is not useful novelty. Human preference and first-time play testing are still needed.",
    "The delivery gate was added after inspecting the first held-out audit. Delivery results are a policy audit, not an untouched estimate of learned generalization.",
    "Teacher-forced tile NLL and intention proxies do not establish an enjoyable game."
  ],
  "previews": [
    {
      "design": {
        "family": "radial-machine",
        "purpose": "machine hall",
        "intent": "Four radial supports frame the instrument, leaving a diagonal entry view.",
        "entry": 4,
        "exit": 3,
        "look": {
          "x": 1,
          "y": 4
        },
        "focal": {
          "x": 7,
          "y": 7,
          "type": "instrument"
        },
        "optional": {
          "x": 4,
          "y": 9,
          "label": "Maintenance record"
        },
        "seed": 740000
      },
      "outputs": {
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          "metrics": {
            "connected": true,
            "clearance": true,
            "entryFocalSightline": false,
            "optionalDiscoveryClear": true,
            "openFraction": 0.673469387755102,
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            "densityInPurposeBand": true,
            "isolatedWallFraction": 0.14285714285714285,
            "intentionProxy": false
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          "rawMetrics": {
            "connected": true,
            "clearance": true,
            "entryFocalSightline": false,
            "optionalDiscoveryClear": true,
            "openFraction": 0.673469387755102,
            "wallDensity": 0.09722222222222222,
            "densityInPurposeBand": true,
            "isolatedWallFraction": 0.14285714285714285,
            "intentionProxy": false
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          "source": "learned",
          "attempts": 1,
          "ms": 1.6749580000000037,
          "nll": 35.950075244098194,
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