orbit/data/systems.json

{
  "_comment": "System archetypes. Each type is themable (theme) and has attributes that steer the SystemGenerator: star classes, binary chance, planet class weights, moon/belt chances, habitability, hazard, and free-space settlement odds (settlements: deepSpaceStation / waypoint). objectCount is a GLOBAL rule, not per-type: the starting system is exempt (it always holds exactly two generated planets — gas giant + rocky — beside the home world, plus at most one free-space station). Every other system rolls its TOTAL object count — planets + free-space stations together — from this table: `barren` of systems hold ZERO objects (a jump-gate-only system — star and gates, nothing else), the rest hold `objects` counts. The split is resolved by rolling the free-space stations first (per-type odds in attributes.settlements × the core→rim gradient, at most two — deepSpaceStation + waypoint), then planets = N − stations. Every planet is settled by rule (data/settlements.json → allPlanetsSettled + settledKindByClass). distribution.weight sets how common the type is; distribution.radiusBand ([inner, outer] as a fraction of galaxy radius) is the first proximity rule — richer distribution rules slot into galaxy.json `distribution.rules` later.",
  "objectCount": {
    "barren": 0.10,
    "objects": { "2": 0.15, "3": 0.30, "4": 0.30, "5": 0.15 }
  },
  "types": {
    "main": {
      "label": "Main Sequence",
      "description": "An ordinary star and its worlds — the galaxy's working majority.",
      "theme": { "color": "#9fb4e8" },
      "distribution": { "weight": 34, "radiusBand": null },
      "attributes": {
        "star": {
          "classes": { "G": 30, "K": 40, "M": 30 },
          "mass": { "G": [0.8, 1.4], "K": [0.5, 0.8], "M": [0.1, 0.5] }
        },
        "binaryChance": 0.05,
        "planetClasses": { "rocky": 45, "gas": 25, "ice": 18, "lava": 12 },
        "moonChance": 0.3,
        "beltChance": 0.35,
        "habitability": 0.1,
        "hazard": 0.1,
        "settlements": {
          "deepSpaceStation": { "chance": 0.25 },
          "waypoint": { "chance": 0.35 }
        }
      }
    },
    "redDwarf": {
      "label": "Red Dwarf",
      "description": "A small, long-lived M star with close-in, moon-rich worlds.",
      "theme": { "color": "#e8927c" },
      "distribution": { "weight": 26, "radiusBand": [0.0, 0.6] },
      "attributes": {
        "star": {
          "classes": { "M": 85, "K": 15 },
          "mass": { "M": [0.08, 0.35], "K": [0.5, 0.8] }
        },
        "binaryChance": 0.12,
        "planetClasses": { "rocky": 50, "gas": 15, "ice": 28, "lava": 7 },
        "moonChance": 0.45,
        "beltChance": 0.3,
        "habitability": 0.22,
        "hazard": 0.12,
        "settlements": {
          "deepSpaceStation": { "chance": 0.2 },
          "waypoint": { "chance": 0.3 }
        }
      }
    },
    "binary": {
      "label": "Binary",
      "description": "Two stars, one system. Tangled orbits, wide spacings, rich debris.",
      "theme": { "color": "#c9a7ff" },
      "distribution": { "weight": 10, "radiusBand": [0.15, 0.95] },
      "attributes": {
        "star": {
          "classes": { "F": 25, "G": 40, "K": 35 },
          "mass": { "F": [1.0, 1.6], "G": [0.8, 1.4], "K": [0.5, 0.8] }
        },
        "binaryChance": 1.0,
        "planetClasses": { "rocky": 30, "gas": 40, "ice": 20, "lava": 10 },
        "moonChance": 0.5,
        "beltChance": 0.6,
        "habitability": 0.06,
        "hazard": 0.18,
        "settlements": {
          "deepSpaceStation": { "chance": 0.3 },
          "waypoint": { "chance": 0.3 }
        }
      }
    },
    "habitable": {
      "label": "Habitable",
      "description": "Temperate, well-lit, and quietly crowded with life. Rare.",
      "theme": { "color": "#7ce8a4" },
      "distribution": { "weight": 10, "radiusBand": [0.2, 0.75] },
      "attributes": {
        "star": {
          "classes": { "G": 70, "K": 30 },
          "mass": { "G": [0.85, 1.3], "K": [0.6, 0.85] }
        },
        "binaryChance": 0.03,
        "planetClasses": { "rocky": 62, "gas": 18, "ice": 14, "lava": 6 },
        "moonChance": 0.35,
        "beltChance": 0.25,
        "habitability": 0.5,
        "hazard": 0.05,
        "settlements": {
          "deepSpaceStation": { "chance": 0.25 },
          "waypoint": { "chance": 0.4 }
        }
      }
    },
    "nebula": {
      "label": "Nebula",
      "description": "Young, bright, and still messy — debris where planets should be.",
      "theme": { "color": "#5fd4d0" },
      "distribution": { "weight": 12, "radiusBand": [0.4, 1.0] },
      "attributes": {
        "star": {
          "classes": { "A": 20, "F": 30, "G": 50 },
          "mass": { "A": [1.4, 2.1], "F": [1.0, 1.6], "G": [0.8, 1.4] }
        },
        "binaryChance": 0.1,
        "planetClasses": { "rocky": 20, "gas": 25, "ice": 15, "lava": 40 },
        "moonChance": 0.2,
        "beltChance": 0.8,
        "habitability": 0.02,
        "hazard": 0.35,
        "settlements": {
          "deepSpaceStation": { "chance": 0.2 },
          "waypoint": { "chance": 0.45 }
        }
      }
    },
    "void": {
      "label": "Void",
      "description": "Old, cold, and mostly empty. The rim's quiet dead ends.",
      "theme": { "color": "#7d88a8" },
      "distribution": { "weight": 8, "radiusBand": [0.7, 1.0] },
      "attributes": {
        "star": {
          "classes": { "M": 90, "K": 10 },
          "mass": { "M": [0.08, 0.3], "K": [0.4, 0.6] }
        },
        "binaryChance": 0.08,
        "planetClasses": { "rocky": 20, "gas": 10, "ice": 55, "lava": 15 },
        "moonChance": 0.1,
        "beltChance": 0.2,
        "habitability": 0.02,
        "hazard": 0.5,
        "settlements": {
          "deepSpaceStation": { "chance": 0.15 },
          "waypoint": { "chance": 0.25 }
        }
      }
    }
  }
}