Class WeatherApi

Force every segment to a fixed type (or null to clear). Makes the biome-deviation + thermal-coupling tests deterministic without pinning a seed.

Clear the forced-type override.

Per-field additive deviation for an already-resolved locality at a game-time. The caller resolved the Locality | null, so this never does I/O — biome's per-read cost stays a hash. A clear segment is zero in every field, so a weather-flat read is biome-identical.

Current sample + the next-segments segment types for a scope.

True iff the WeatherLogic singleton is present (weather configured). A non-creating presence check — the biome seam calls this before any address walk, so weather-absent costs nothing.

The next segment-boundary game-time strictly after timeS. Boot calls this when registering the boundary system schedule — which also forces the singleton into existence (activating weather).

The segment-boundary callback, fired by the WorldClock system schedule. Runs the presence-gated thermal restamp fan-out; weather arms nothing itself.

The current weather sample at a scope (resolves its covering Locality).

Deterministic weather sample for an instant + locality. Pure: same (timeS, locality) always yields the same sample, across processes. A future time is computable now (the forecast property).