Save project as pattern

How can I save a project as a sample project and copy or duplicate it?
Things that might be helpful to know (Agenda version, OS and model, etc):

It’s not yet possible to create a project “template”, but one way to do this is to create the project like you’d like to have it, then export it as an Agenda file. Now each time you double-click the agenda file it will ask you if you want to import it, which allows you to use it as a new project to start from.