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settled-reach/governance/decisions
jpmschweitzerandClaude Opus 5.5 10811029e5 docs(meta): D-258 — ids, not fields; biome and terrain are two maps
Supersedes the same morning's shape; its four rulings stand.

- Scope, measured: 257 bodies with an atmosphere (airless deferred, with
  room left in the format). Full 1024x512.
- Ruling 5: bake class ids only. What a class IS lives in class tables,
  authored as TOML and imported into systems.db under the stamp, so a
  definition is written once, can grow, and changes every world without a
  re-bake. Per-pixel temperature and moisture are dropped: ~38 MiB for a
  within-class gradient that bilinear class mixing and the climate model
  mostly recover, and that the simulator often clamps flat anyway.
- Ruling 6: terrain type and biome are separate maps. compute_biome already
  computes the Whittaker class first and then paints terrain over it, so
  biomemap takes it pre-override and terrainmap carries the override. Terrain
  carries no climate, and the biome underneath always does.
- Open: the anomaly scatter's story features (placement, and a 3% rate
  Jeroen calls high, for a balancing pass).
- Records the mountain-rock units bug fixed in the previous commit, and
  sulfuric scrub's unreachable elevation window, left as found.

T-1295, T-1215, T-1297 re-shaped to match.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-09-25 14:03:45 +02:00
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