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settled-reach/docs/atlas/proposals/GJ402.json
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jpmschweitzerandClaude Opus 4.6 db241b88bd refactor(schema): rename biome_summary to planet_class (D-188) 
"Biome" describes per-zone vegetation classification (Whittaker table).
"Planet class" describes overall planetary character. The conflation
caused the planet generator to misclassify ~270 bodies as barren.

Scope: systems.db column, schema SQL, Rust atlas code, wiki table
headers (Biome → Class), atlas proposal JSONs, all docs/decisions,
tooling scripts. Also normalizes atmosphere vocabulary (breathable →
standard) and expands planet class mapping to all 26 wiki values.
Unknown classes default to temperate for modder safety.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
2026-04-06 17:10:35 +02:00

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{
"system_id": "GJ 402",
"proper_name": "Prospect Hill",
"star_type": "M",
"spectral_class": "M4:",
"wiki_data": {
"habitable_count": 1,
"inhabited_count": 1,
"has_gas_giant": true,
"has_asteroid_belt": true,
"has_horizon_station": true,
"raw_bodies_line": null
},
"bodies": [
{
"body_id": "GJ402b",
"proper_name": null,
"body_type": "planet",
"orbit_index": 1,
"parent_body_id": null,
"inhabited": false,
"population": 0,
"mass_class": "terrestrial",
"surface_gravity": 0.28,
"orbital_period_days": 3,
"rotation_period_hours": 72,
"atmosphere": "none",
"planet_class": "barren",
"hydrosphere": "none",
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "inner scorched, tidally locked"
},
{
"body_id": "GJ402c",
"proper_name": "Arkwright",
"body_type": "planet",
"orbit_index": 2,
"parent_body_id": null,
"inhabited": true,
"population": 80000000,
"mass_class": "terrestrial",
"surface_gravity": 0.82,
"orbital_period_days": 10,
"rotation_period_hours": 240,
"atmosphere": "breathable",
"planet_class": "arid",
"hydrosphere": "minimal",
"economic_role": "extraction",
"settlement_pattern": "urban",
"industrial_corridor": null,
"notes": "primary inhabited world, tidally locked, dim M4 red light, supplemental lighting agriculture, mineral extraction industry, Wave 3 settlement with 300 years of gradual cultural formation, Community Assembly, Prospect Hill Extraction Consortium"
},
{
"body_id": "GJ402c-1",
"proper_name": null,
"body_type": "moon",
"orbit_index": 1,
"parent_body_id": "GJ402c",
"inhabited": false,
"population": 0,
"mass_class": "dwarf",
"surface_gravity": 0.04,
"orbital_period_days": 4,
"rotation_period_hours": 96,
"atmosphere": "none",
"planet_class": "barren",
"hydrosphere": "none",
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "small moon"
},
{
"body_id": "GJ402d",
"proper_name": null,
"body_type": "planet",
"orbit_index": 3,
"parent_body_id": null,
"inhabited": false,
"population": 0,
"mass_class": "terrestrial",
"surface_gravity": 0.35,
"orbital_period_days": 28,
"rotation_period_hours": 672,
"atmosphere": "thin",
"planet_class": "frozen",
"hydrosphere": "ice",
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "cold rocky, tidally locked"
},
{
"body_id": "GJ402e",
"proper_name": null,
"body_type": "planet",
"orbit_index": 4,
"parent_body_id": null,
"inhabited": false,
"population": 0,
"mass_class": "terrestrial",
"surface_gravity": 0.28,
"orbital_period_days": 80,
"rotation_period_hours": 1920,
"atmosphere": "none",
"planet_class": "frozen",
"hydrosphere": "ice",
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "frozen rocky, tidally locked"
},
{
"body_id": "GJ402f",
"proper_name": null,
"body_type": "gas_giant",
"orbit_index": 5,
"parent_body_id": null,
"inhabited": false,
"population": 0,
"mass_class": "gas_giant",
"surface_gravity": null,
"orbital_period_days": 400,
"rotation_period_hours": 10.0,
"atmosphere": "dense",
"planet_class": null,
"hydrosphere": null,
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "moderate gas giant"
},
{
"body_id": "GJ402f-1",
"proper_name": null,
"body_type": "moon",
"orbit_index": 1,
"parent_body_id": "GJ402f",
"inhabited": false,
"population": 0,
"mass_class": "dwarf",
"surface_gravity": 0.05,
"orbital_period_days": 5,
"rotation_period_hours": 120,
"atmosphere": "none",
"planet_class": "barren",
"hydrosphere": "none",
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "inner gas giant moon"
},
{
"body_id": "GJ402f-2",
"proper_name": null,
"body_type": "moon",
"orbit_index": 2,
"parent_body_id": "GJ402f",
"inhabited": false,
"population": 0,
"mass_class": "dwarf",
"surface_gravity": 0.03,
"orbital_period_days": 12,
"rotation_period_hours": 288,
"atmosphere": "none",
"planet_class": "frozen",
"hydrosphere": "ice",
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "icy outer gas giant moon"
},
{
"body_id": "GJ402g",
"proper_name": null,
"body_type": "planet",
"orbit_index": 6,
"parent_body_id": null,
"inhabited": false,
"population": 0,
"mass_class": "terrestrial",
"surface_gravity": 0.22,
"orbital_period_days": 1500,
"rotation_period_hours": 18.0,
"atmosphere": "none",
"planet_class": "frozen",
"hydrosphere": "ice",
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "outer ice world"
},
{
"body_id": "GJ402h",
"proper_name": null,
"body_type": "planet",
"orbit_index": 7,
"parent_body_id": null,
"inhabited": false,
"population": 0,
"mass_class": "dwarf",
"surface_gravity": 0.1,
"orbital_period_days": 3800,
"rotation_period_hours": 22.0,
"atmosphere": "none",
"planet_class": "frozen",
"hydrosphere": "ice",
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "distant ice dwarf"
},
{
"body_id": "GJ402-belt",
"proper_name": null,
"body_type": "asteroid_belt",
"orbit_index": 8,
"parent_body_id": null,
"inhabited": false,
"population": 0,
"mass_class": null,
"surface_gravity": null,
"orbital_period_days": null,
"rotation_period_hours": null,
"atmosphere": null,
"planet_class": null,
"hydrosphere": null,
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "sparse belt"
},
{
"body_id": "GJ402-oort",
"proper_name": null,
"body_type": "oort_cloud",
"orbit_index": 9,
"parent_body_id": null,
"inhabited": false,
"population": 0,
"mass_class": null,
"surface_gravity": null,
"orbital_period_days": null,
"rotation_period_hours": null,
"atmosphere": null,
"planet_class": null,
"hydrosphere": null,
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "oort cloud"
}
],
"stations": [
{
"station_id": "GJ402c-S1",
"proper_name": "Brindle",
"orbits_body_id": "GJ402c",
"station_type": "industrial",
"population": 5000000,
"economic_role": "extraction",
"docking_class": "standard",
"has_gate_infrastructure": false,
"notes": "Prospect Hill Extraction Consortium, mineral export staging, Junction Liaison Committee, new transit services sector"
},
{
"station_id": "GJ402-oort-S1",
"proper_name": "Standish",
"orbits_body_id": "GJ402-oort",
"station_type": "horizon",
"population": 0,
"economic_role": "transit",
"docking_class": "major",
"has_gate_infrastructure": true,
"notes": "horizon station, 2 apertures"
}
]
}
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