config/game.local.json

{
  "world": {
    "width": 240,
    "depth": 80,
    "terrain": "plain_green",
    "seed": 42,
    "survival": true
  },
  "npcs": {
    "count": 6
  },
  "simulation": {
    "tick_ms": 500
  },
  "server": {
    "host": "127.0.0.1",
    "port": 8000
  }
}