STARTLINER

The core design goal is nondestructive modding, with many configurations being capable of using the same clean data.
Downloaded packages are stored in %LOCALAPPDATA%\STARTLINER\data\pkg (or $XDG_DATA_HOME/startliner/pkg).
Each profile is associated with a prefix directory %LOCALAPPDATA%\STARTLINER\data\profile-{game}-{name} which includes:
- option with junctions of vanilla opts as well as Rainycolor package opts
- BepInEx with Rainycolor mods copied over
  - It's currently pointless to symlink those since they are measured in kilobytes
- segatools.ini generated on-the-fly and pointing at option
- logs
Persistent configuration is stored in %APPDATA%\STARTLINER (or $XDG_CONFIG_HOME/startliner).