Function default_registration_file 

pub fn default_registration_file(
    get: &dyn Fn(&str) -> Option<String>,
    user_home: &Path,
) -> PathBuf

The registration file’s default location: $XDG_STATE_HOME/opencode/service.json, else ~/.local/state/opencode/service.json (packages/util/src/global.ts:79 roots).