[thedougd]

You can also embed the source into a png or svg and commit those to the repo. Diagrams.net will allow you to open from the source embedded png or svg.

[thrtythreeforty]

This is possibly one of Diagrams's killer features, especially in the days of proprietary cloud document hosting that (poorly) attempts to hide the "file" abstraction. You can plunk your diagram directly into the doc without worrying if you'll be able to keep track of the source if you need to edit it later.