This plugin is an example of an invisible UXP plugin. An invisible plugin remains hidden during its whole life cycle -- meaning it does not have any UI or (persistent) menu options.
This plugin will surface an alert dialog. Note that the alert is shown when entrypoints.plugin.create()
is called. This method is called only upon upon plugin installation so if you want to see the alert appear again, you'll have to uninstall and reinstall the plugin.