{
  "width": 32,
  "height": 32,
  "default_cell": {
    "biome_type": "temperate_grassland",
    "clade_affinities": ["bovid", "cervid"],
    "development": "agricultural",
    "covenant": "moderate",
    "elevation_floor": 0.0,
    "elevation_ceiling": 0.48,
    "moisture_floor": 0.25,
    "moisture_ceiling": 0.65,
    "temp_modifier": 0.0
  },
  "regions": [
    {
      "comment": "─── NORTH: Tundra / Boreal Forest (rows 0–7, full width) ───",
      "x": 0, "y": 0, "w": 32, "h": 5,
      "biome_type": "tundra",
      "clade_affinities": ["polar_ursid", "wolverine"],
      "development": "wilderness",
      "covenant": "nominal",
      "elevation_floor": 0.08,
      "elevation_ceiling": 0.58,
      "moisture_floor": 0.0,
      "moisture_ceiling": 0.42,
      "temp_modifier": -0.18
    },
    {
      "comment": "Boreal belt under tundra",
      "x": 0, "y": 5, "w": 32, "h": 4,
      "biome_type": "boreal",
      "clade_affinities": ["polar_ursid", "wolverine", "mustelid"],
      "development": "frontier",
      "covenant": "weak",
      "elevation_floor": 0.05,
      "elevation_ceiling": 0.55,
      "moisture_floor": 0.35,
      "moisture_ceiling": 0.75,
      "temp_modifier": -0.1
    },
    {
      "comment": "─── UPPER MIDDLE: Temperate Forest (rows 9–14, left half cols 0–15) ───",
      "x": 0, "y": 9, "w": 16, "h": 6,
      "biome_type": "temperate_deciduous",
      "clade_affinities": ["cervid", "canid", "mustelid"],
      "development": "agricultural",
      "covenant": "moderate",
      "elevation_floor": 0.0,
      "elevation_ceiling": 0.52,
      "moisture_floor": 0.42,
      "moisture_ceiling": 0.82,
      "temp_modifier": 0.0
    },
    {
      "comment": "─── UPPER MIDDLE: Northern Plains (rows 9–14, right half cols 16–31) ───",
      "x": 16, "y": 9, "w": 16, "h": 6,
      "biome_type": "temperate_grassland",
      "clade_affinities": ["canid", "equid"],
      "development": "agricultural",
      "covenant": "moderate",
      "elevation_floor": 0.0,
      "elevation_ceiling": 0.38,
      "moisture_floor": 0.22,
      "moisture_ceiling": 0.58,
      "temp_modifier": 0.03
    },
    {
      "comment": "─── MIDDLE LEFT: Eastern Industrial Belt (rows 15–22, cols 0–9) ───",
      "x": 0, "y": 15, "w": 10, "h": 8,
      "biome_type": "temperate_deciduous",
      "clade_affinities": ["canid", "mustelid", "bovid", "cervid"],
      "development": "industrial",
      "covenant": "strong",
      "elevation_floor": 0.0,
      "elevation_ceiling": 0.45,
      "moisture_floor": 0.35,
      "moisture_ceiling": 0.72,
      "temp_modifier": 0.05
    },
    {
      "comment": "─── MIDDLE CENTRE: Central Grasslands (rows 15–22, cols 10–21) ───",
      "x": 10, "y": 15, "w": 12, "h": 8,
      "biome_type": "temperate_grassland",
      "clade_affinities": ["bovid", "cervid", "equid"],
      "development": "agricultural",
      "covenant": "moderate",
      "elevation_floor": 0.0,
      "elevation_ceiling": 0.4,
      "moisture_floor": 0.2,
      "moisture_ceiling": 0.55,
      "temp_modifier": 0.05
    },
    {
      "comment": "─── MIDDLE RIGHT: Western Mountains (rows 15–22, cols 22–31) ───",
      "x": 22, "y": 15, "w": 10, "h": 8,
      "biome_type": "mountain_alpine",
      "clade_affinities": ["ursid", "caprid", "feline"],
      "development": "frontier",
      "covenant": "weak",
      "elevation_floor": 0.62,
      "elevation_ceiling": 1.0,
      "moisture_floor": 0.25,
      "moisture_ceiling": 0.72,
      "temp_modifier": -0.1
    },
    {
      "comment": "Mountain foothills transition east of mountains",
      "x": 19, "y": 15, "w": 3, "h": 8,
      "biome_type": "mountain_forested",
      "clade_affinities": ["ursid", "cervid"],
      "development": "frontier",
      "covenant": "weak",
      "elevation_floor": 0.42,
      "elevation_ceiling": 0.72,
      "moisture_floor": 0.3,
      "moisture_ceiling": 0.7,
      "temp_modifier": -0.05
    },
    {
      "comment": "─── SOUTH LEFT: Southeastern Coast (rows 23–31, cols 0–9) ───",
      "x": 0, "y": 23, "w": 10, "h": 9,
      "biome_type": "coastal",
      "clade_affinities": ["feline", "mustelid", "canid"],
      "development": "urban",
      "covenant": "strong",
      "elevation_floor": 0.0,
      "elevation_ceiling": 0.25,
      "moisture_floor": 0.4,
      "moisture_ceiling": 0.8,
      "temp_modifier": 0.12
    },
    {
      "comment": "─── SOUTH RIGHT: Subtropical Lowlands / The Tangles (rows 23–31, cols 10–31) ───",
      "x": 10, "y": 23, "w": 22, "h": 9,
      "biome_type": "subtropical_forest",
      "clade_affinities": ["hybrid", "feline", "reptilian", "canid"],
      "development": "frontier",
      "covenant": "nominal",
      "elevation_floor": 0.0,
      "elevation_ceiling": 0.45,
      "moisture_floor": 0.62,
      "moisture_ceiling": 1.0,
      "temp_modifier": 0.2
    },
    {
      "comment": "Southern wetland pockets within The Tangles",
      "x": 12, "y": 25, "w": 8, "h": 5,
      "biome_type": "wetland",
      "clade_affinities": ["hybrid", "amphibian"],
      "development": "wilderness",
      "covenant": "nominal",
      "elevation_floor": 0.0,
      "elevation_ceiling": 0.22,
      "moisture_floor": 0.78,
      "moisture_ceiling": 1.0,
      "temp_modifier": 0.18
    },
    {
      "comment": "Mountain southern extension (cols 22–31, rows 23–27)",
      "x": 22, "y": 23, "w": 10, "h": 5,
      "biome_type": "mountain_alpine",
      "clade_affinities": ["ursid", "caprid"],
      "development": "wilderness",
      "covenant": "nominal",
      "elevation_floor": 0.55,
      "elevation_ceiling": 1.0,
      "moisture_floor": 0.22,
      "moisture_ceiling": 0.65,
      "temp_modifier": -0.08
    }
  ]
}