{
  "readme": [
    "Allowed XY scale range when a source footprint module is mapped onto an approved library asset.",
    "Shared contract: tools/city-massing/generate-oldtown-fill.mjs decides the module lattice with it,",
    "and tools/city-massing/assemble-lod-district.py refuses to place anything outside it.",
    "Below the minimum the facade windows/balconies stop reading as architecture; above the maximum",
    "the asset is stretched past a believable building. Keep both readers in sync through this file."
  ],
  "variants": {
    "house": {
      "nominal_m": [12, 9],
      "minScale": [0.55, 0.55],
      "maxScale": [1.7, 1.7]
    },
    "slab": {
      "nominal_m": [30, 12],
      "minScale": [0.6, 0.62],
      "maxScale": [1.5, 1.5]
    },
    "midrise": {
      "nominal_m": [20, 16],
      "minScale": [0.65, 0.65],
      "maxScale": [1.45, 1.45]
    },
    "midrise-wide": {
      "nominal_m": [28, 24],
      "minScale": [0.7, 0.7],
      "maxScale": [1.4, 1.4]
    }
  },
  "lattice": {
    "inset_m": 0.25,
    "gap_m": 0.8,
    "maxModulesPerFootprint": 24
  }
}