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settled-reach/docs/atlas/proposals/GJ42.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 42",
"proper_name": "Langemark",
"star_type": "K",
"spectral_class": "K2V",
"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": "GJ42b",
"proper_name": null,
"body_type": "planet",
"orbit_index": 1,
"parent_body_id": null,
"inhabited": false,
"population": null,
"mass_class": "terrestrial",
"surface_gravity": 0.64,
"orbital_period_days": 52.0,
"rotation_period_hours": 1248.0,
"atmosphere": "none",
"planet_class": "barren",
"hydrosphere": null,
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "inner rocky; tidally locked at 52-day period × 24 = 1248h rotation; heavily irradiated dayside; no atmosphere"
},
{
"body_id": "GJ42c",
"proper_name": "Poperinge",
"body_type": "planet",
"orbit_index": 2,
"parent_body_id": null,
"inhabited": true,
"population": 55000,
"mass_class": "terrestrial",
"surface_gravity": 0.89,
"orbital_period_days": 200.0,
"rotation_period_hours": 24.8,
"atmosphere": "standard",
"planet_class": "temperate",
"hydrosphere": "liquid_water",
"economic_role": "agricultural",
"settlement_pattern": "dispersed",
"industrial_corridor": "agricultural_export",
"notes": "primary inhabited world; K2V habitable zone; genuine agricultural potential found by founding pastoral cooperative; temperate conditions, good soil, river-valley farmland; Wave 3 settlement ~300 years old; population peaked ~80 years ago and in slow consistent decline as young adults leave for inner-corridor systems offering more economic variety; self-governing council of landholders (reformed ~150 years ago to include non-agricultural members); no Assembly or Compact presence; Gate Corporation maintenance rotation is extent of institutional contact"
},
{
"body_id": "GJ42c-1",
"proper_name": null,
"body_type": "moon",
"orbit_index": 1,
"parent_body_id": "GJ42c",
"inhabited": false,
"population": null,
"mass_class": "dwarf",
"surface_gravity": 0.07,
"orbital_period_days": 21.4,
"rotation_period_hours": 513.6,
"atmosphere": "none",
"planet_class": "barren",
"hydrosphere": null,
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "Poperinge's single moon; tidally locked; used in local calendar reckoning by farming community"
},
{
"body_id": "GJ42d",
"proper_name": null,
"body_type": "planet",
"orbit_index": 3,
"parent_body_id": null,
"inhabited": false,
"population": null,
"mass_class": "terrestrial",
"surface_gravity": 0.52,
"orbital_period_days": 510.0,
"rotation_period_hours": 21.2,
"atmosphere": "thin",
"planet_class": "arid",
"hydrosphere": null,
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "dry rocky world beyond habitable zone; thin atmosphere; polar ice caps; surveyed early settlement era, no viable resource concentration found"
},
{
"body_id": "GJ42-belt",
"proper_name": null,
"body_type": "asteroid_belt",
"orbit_index": 4,
"parent_body_id": null,
"inhabited": false,
"population": null,
"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 main belt; early prospectors found insufficient concentration for cooperative extraction economics; no active operations"
},
{
"body_id": "GJ42e",
"proper_name": null,
"body_type": "gas_giant",
"orbit_index": 5,
"parent_body_id": null,
"inhabited": false,
"population": null,
"mass_class": "gas_giant",
"surface_gravity": 2.1,
"orbital_period_days": 2200.0,
"rotation_period_hours": 11.4,
"atmosphere": "hydrogen-helium",
"planet_class": null,
"hydrosphere": null,
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "mid-system gas giant; amber-tan banding; no active resource extraction"
},
{
"body_id": "GJ42e-1",
"proper_name": null,
"body_type": "moon",
"orbit_index": 1,
"parent_body_id": "GJ42e",
"inhabited": false,
"population": null,
"mass_class": "dwarf",
"surface_gravity": 0.08,
"orbital_period_days": 12.6,
"rotation_period_hours": 302.4,
"atmosphere": "none",
"planet_class": "barren",
"hydrosphere": null,
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "inner gas giant moon; dark cratered surface"
},
{
"body_id": "GJ42e-2",
"proper_name": null,
"body_type": "moon",
"orbit_index": 2,
"parent_body_id": "GJ42e",
"inhabited": false,
"population": null,
"mass_class": "dwarf",
"surface_gravity": 0.06,
"orbital_period_days": 27.8,
"rotation_period_hours": 667.2,
"atmosphere": "none",
"planet_class": "frozen",
"hydrosphere": null,
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "outer gas giant moon; icy surface; subsurface ice confirmed"
},
{
"body_id": "GJ42f",
"proper_name": null,
"body_type": "planet",
"orbit_index": 6,
"parent_body_id": null,
"inhabited": false,
"population": null,
"mass_class": "terrestrial",
"surface_gravity": 0.42,
"orbital_period_days": 5800.0,
"rotation_period_hours": 18.4,
"atmosphere": "none",
"planet_class": "frozen",
"hydrosphere": null,
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "outer ice-rock world; methane frost surface; uninhabited"
},
{
"body_id": "GJ42g",
"proper_name": null,
"body_type": "planet",
"orbit_index": 7,
"parent_body_id": null,
"inhabited": false,
"population": null,
"mass_class": "dwarf",
"surface_gravity": 0.07,
"orbital_period_days": 14000.0,
"rotation_period_hours": 14.2,
"atmosphere": "none",
"planet_class": "frozen",
"hydrosphere": null,
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "outer ice dwarf; trans-neptunian analog"
},
{
"body_id": "GJ42h",
"proper_name": null,
"body_type": "planet",
"orbit_index": 8,
"parent_body_id": null,
"inhabited": false,
"population": null,
"mass_class": "dwarf",
"surface_gravity": 0.05,
"orbital_period_days": 31000.0,
"rotation_period_hours": 11.8,
"atmosphere": "none",
"planet_class": "frozen",
"hydrosphere": null,
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "distant outer ice dwarf; scattered disk object"
},
{
"body_id": "GJ42i",
"proper_name": null,
"body_type": "planet",
"orbit_index": 9,
"parent_body_id": null,
"inhabited": false,
"population": null,
"mass_class": "dwarf",
"surface_gravity": 0.04,
"orbital_period_days": 58000.0,
"rotation_period_hours": 10.2,
"atmosphere": "none",
"planet_class": "frozen",
"hydrosphere": null,
"economic_role": null,
"settlement_pattern": null,
"industrial_corridor": null,
"notes": "extreme outer ice dwarf; detached scattered-disk object"
},
{
"body_id": "GJ42-oort",
"proper_name": null,
"body_type": "oort_cloud",
"orbit_index": 10,
"parent_body_id": null,
"inhabited": false,
"population": null,
"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; gate infrastructure sited here"
}
],
"stations": [
{
"station_id": "GJ42-oort-S1",
"proper_name": "Langemark Horizon",
"orbits_body_id": "GJ42-oort",
"station_type": "horizon",
"population": 2000,
"economic_role": "transit",
"docking_class": "major",
"has_gate_infrastructure": true,
"notes": "two-aperture through-route horizon station; maintained under standing 10-year commercial agreement with Gate Corporation; Gate Corp maintenance team rotates every 14 months; modest permanent crew handles transit scheduling and corridor resupply; connects Echternach inbound and Bout du Chemin outbound; deliberate non-growth policy — council views the station as infrastructure, not community expansion"
}
]
}
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