I don't understand, though. Since it's a model, why say "gitable=no" instead of having ability to have those "frozen sources of truth" git-committed?

In fact, it's not clear to me, can I even get the model code out of this? I see "model export" but can't tell what the toolbox means from your visual tool.

I really want to use this, but only if it integrates back into the everything-as-code record. (I don't even care if bi-directional for now, but it has to snapshot the model out.)