Tempest, the framework Brent Roose is working on, allows you to attach a tag to a singleton definition, which means you can have multiple singletons of the same class, as long as their tags differ.
PHP
Run seeders from migrations
A practical look at why you should populate essential data from migrations instead of seeders. Once your app is live, manually running seeders becomes a deployment risk. Migrations are deterministic, automatic, and roll back cleanly. Read more…