instance.baseDir.
Config directory.
Content directory (the default silo unless siloRouting.defaultBasePath is set).
Credential files.
gog home: service-account keys, OAuth client credentials, keyring.
IMAP secret files: the imap folder under credentialsDir.
The instance repo.
Service state.
Token metrics output.
Every path core resolves from
instance.baseDirandpaths.