# Launcher Upgrade Checklist

- [x] Build passes for `LanMountainDesktop.Launcher`.
- [x] `update check` command returns structured JSON result.
- [x] `plugin update` command returns structured JSON result.
- [x] Legacy plugin install arguments still execute.
- [x] OOBE and splash are implemented as separate windows.
- [x] Update and rollback logic use version directory markers.