IsTutorial duplicated Galaxy.IsPrelude; its readers read CurrentGalaxy.IsPrelude, and RunSave.Capture writes
SavedGame.IsTutorial from galaxy.IsPrelude with no isTutorial argument. TutorialPassed was never written and its only
reader was New Game's unreachable main-galaxy branch, which goes with it (S2 brings the main galaxy back as a
scenario). spawnturret's two identical generator branches collapse to one. Old player.cc files still load.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>