Closes the 8a follow-up. string.GetHashCode is stable on Mono but randomized
per process on .NET Core, so a headless sim that generates zones would get
different zones on every run.
- Extensions.StableHash folds a string's UTF-8 bytes through CultMath's pcg
from the FNV-1a offset basis. No new CultMath API.
- ZoneGenerator seeds from `Name.StableHash() ^ pcg3d(Position).x`.
- Zone seeds from `Name.StableHash() ?? 1337u`. CultMath's Random maps
seed 0 to its default, and the abs/Convert.ToUInt32 pair that threw on
int.MinValue is gone.
Old runs are discarded, so a different galaxy per seed costs nothing.
Tests: StableHashIsNotProcessRandomized pins "Adrasteia" to 2427892944, the
value an independent Add-Type transcription of CultMath's pcg produced. It
fails with GetHashCode substituted back in.
Builds: headless, 15 tests pass, Unity batchmode compile reports no error CS.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Owner: ActionGameManager composes the process's one cache. Its CultCache
getter attaches the catalog, GameData/run.cc and GameData/player.cc on
first access, in either scene, and nothing reopens it.
- RunSave (SavedGame.cs) replaces the SavedGame constructor:
- Capture builds the live run as plain documents and writes nothing. Zone
contents are `zone.Contents?.PackZone() ?? zone.PackedContents`, so a
zone generated earlier but not loaded this session keeps its contents
and its orbit and body records instead of being erased by the next save.
- Commit is the only writer of SavedGame and SavedZone: one Commit with
zone i at `savedzone-{i}`, SavedGame.Zones set to those refs, and every
stored SavedZone outside that set removed. Orbits and bodies staged by
zone generation land in the same single-file write.
- Clear removes every run record in one Commit.
- Run begins: New Game's first statement is RunSave.Clear. Run saves:
ActionGameManager.SaveRun at wormhole arrival and quit. Run ends: Die
clears the run, then saves settings.
- Run exists only as the run store's SavedGame global: MainMenu enables
Continue from it (and logs when the run store holds records but no
SavedGame), and StartGame reads it once to pick the new-run or resume
branch.
- PlayerSettings: the getter returns the player store's global and, on
first launch, commits GetDefaultPlayerSettings; it is the only creator.
SavePlayerSettings commits the instance.
- InputDisplayLayout reads its InputLayout from the catalog by the layout
asset's name and throws when the catalog has none.
Tests: new RunSaveTests (5): RepeatedSavesKeepRecordCountConstant,
SaveRemovesZonesNoLongerInTheRun, SaveWritesOnlyTheRunStore,
ResumeThenSaveKeepsUnloadedZoneContents, ClearRemovesEveryRunRecord. Each
fails with its rule mutated out.
Builds: headless, 11 tests pass, Unity batchmode compile reports no error CS.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
