Stack review (Hoshe + Tyre) of T-1083+T-1082+T-1080. Every finding fixed or disposed:
- believability.rs sample_indices: replace the rejection-sampling loop (could stall
when n ≈ take) with deterministic partial Fisher-Yates — O(n), guaranteed
termination, distinct, sorted (Hoshe+Tyre).
- believability.rs drainage proxy: exclude water-body districts (all elev 0, no banks)
and require both wet + dry voxels — they were passing vacuously and inflating the
metric (Hoshe).
- believability.rs read_cities: log skipped malformed rows instead of dropping silently
(Hoshe).
- voxel.rs: add the 3 WaterBody zones to all_families_no_panic_at_extreme_positions +
fix the "7 families" comment (Hoshe).
- climate_constants.toml: bold warning that [moisture_gradient] is not loaded until
T-1032 — tune ClimateConstants::default() (Tyre).
- Q-123: record the per-zone "water renders wet" threshold + the land-relative
vegetation-present denominator as calibration items (Tyre + the open 7th criterion).
- T-1083 ticket: note the sampling-fix attribution (landed in the T-1082 commit).
Believability golden regenerated (sampler + drainage fixes moved the metrics).
clippy --all-targets -D warnings clean; 1580 lib tests + harness pass.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
moisture_q was a single body constant (derive_moisture_q took only &BodyParams →
80 for every one of 2048 ocean-world districts), so vegetation/terrain/ecotones
were uniform — "nothing to fuzz" (the T-1080 believability bug).
- district_profile.rs: derive_moisture_q is now a body ceiling (hydrosphere+atmosphere)
× per-district gradient — latitude (equator wet → pole dry), elevation (orographic/
rain-shadow), continentality (100 − ocean_fraction_q). Integer/D-010, no new plumbing
(elev_q/ocean_fraction_q/latitude_deg already reach build_district_profile). Mirrors
D-240's temperature model. Coefficients in ClimateConstants + climate_constants.toml
[moisture_gradient] (provisional; Q-123 calibrates). Tuned so a wet body stays mostly
green with drier patches and a frozen body clamps mostly barren. + gradient unit test.
- region_profile.rs: region-tier moisture gets the region-latitude gradient (elevation/
continentality are district-scale).
- Propagates to precipitation_class / vegetation_class / morphology_zone (all read
moisture_q). D-239 §2 amended. Believability golden regenerated.
Probe (Arbour @ yolo): moisture_q distinct 1 → 49 (spread 0 → 48); 5/7 → 6/7 criteria.
Edict (frozen): moisture 0..20 ×21 — gradient within its low ceiling. Remaining fail
(vegetation-present) is the metric dividing by all-sampled incl. water on a 2/3-ocean
world — a Q-123 calibration concern, not a climate defect.
clippy --all-targets -D warnings clean; 1580 lib tests + harnesses pass.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Add the D-240 hydrosphere modulator: water-rich worlds compress the equator->pole
temperature gradient toward the band midpoint (milder at both ends); dry worlds
swing the full class band.
- [hydrosphere_maritime] table in climate_constants.toml + ClimateConstants
field/method (maritime_factor). Keyed on the ACTUAL bodies.hydrosphere vocab
(liquid_water/ocean/extensive=0.6, rivers/moderate=0.8, ice=0.85, subsurface*
=0.9-0.95; minimal/trace/none/NULL -> 1.0).
- derive_temperature_c step 2 now lerps across a maritime-compressed sub-band
(mid +/- band_half*factor) instead of the full band. Clamp still guarantees the
class-band invariant.
- New maritime_hydrosphere_compresses_the_gradient test (ocean delta < dry delta).
Verified on real worlds: liquid_water/ocean temperate worlds now delta ~24 (milder)
vs dry ~40, all in-band. cargo test passes, clippy -D warnings clean, fmt clean.
Note: discovered derive_moisture_q has the SAME vocab mismatch (expects 'ocean',
DB uses 'liquid_water' for 175 bodies -> falls to default moisture). Pre-existing,
out of scope here — filing a follow-up.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Replace the sun-driven Stefan-Boltzmann temperature with the D-240 class-envelope
model. Temperature derives only from authored fields — no orbit/star physics.
- [planet_class_temperature] envelope table in climate_constants.toml (approved
bands: frozen [-90,-25] .. hot_arid [20,58] .. volcanic [30,90]); cold_/hot_/
warm_ prefix parsing; temperate fallback for unknowns.
- derive_temperature_c(params, constants, body_seed): band = envelope(planet_class);
latitude lerps across it (equator=warm, pole=cold); atmosphere greenhouse +
elevation lapse modulate within; small seed nudge for per-body variety; CLAMP to
band — a body can never escape its class. Airless -> None.
- Delete the dead astrophysics: derive_distance_au, ClimateConstants::luminosity(),
the [star_luminosity] table. Strip orbital_period_days/spectral_class/star_type/
axial_tilt_deg from BodyParams + BodyParamsReader (read 3 cols from bodies, no
star_systems join). DB columns left in place (no regen).
- New every_planet_class_derives_within_its_band test (13 classes x 5 atmo x 19 lat
x 4 seeds, all in band) — the D-240 consistency guard.
Verified on 25 diverse real bodies: the worlds that derived to +356C now sit inside
their class bands (temperate capped at 28C). cargo test passes, clippy -D warnings
clean, fmt clean.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
First foundation slice of the Atlas-to-tile derivation model (epic T-974),
building the carrier layer ahead of its T-1027+ consumers.
T-1026 — Anti-squaring domain warp (D-239 §4): stateless pure
fn(seed,body_id,pos)->(f64,f64), ±8m, f64 to the final voxel then as-i32
truncation for IEEE-754 cross-target determinism. New domain_warp.rs,
SeedDomain::DomainWarp; golden-vector + cross-thread tests. Position math
only — D-010 integer discipline preserved downstream. Marked dead_code
until the T-1028 VoxelColumn pipeline consumes it.
T-1023 — RegionProfile carrier (D-239 §1,§10): new RegionProfile +
TectonicClass/GlaciationGrade/PrecipitationClass enums + BodyParams; derived
per-region river_threshold replacing the global 200 for tile consumers.
regions: BTreeMap on BodyWorldState, populated via the cascade's new
RegionProfile layer (runs when body_params is Some, else falls back to
Settlement). D-010 integer discipline, BTree ordering.
T-1024 — District climate primitives (D-239 §2): nullable temperature_c +
moisture on RegionProfile, mean-annual scalar (no clock dep; dynamic branch
deferred to Q-105). Hybrid inputs — new bodies.axial_tilt_deg column imported
from planet-gen body-defs (populate_axial_tilt_deg, 2611 bodies), luminosity
and orbital distance derived at runtime; greenhouse + diurnal-swing tables in
source-canonical climate_constants.toml. D-239 implementation note added.
cargo test: 1498 passed, 0 failed. clippy clean (pre-existing
large_enum_variant only). make check-systems-db: stamp fresh.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
jpmschweitzerandClaude Opus 4.8