You’re right, I realize now that cog doesn’t process an input template but the actual output file, modifying it in place. Perhaps that why it took so long to gain popularity: that fact seems somewhat non-obvious from the documentation. Even the examples on a cursory glance are not obviously not templates. At least to me.

Re-reading the docs I realize that sure enough, they say very clearly what it does. But I think it just doesn’t click immediately.

Now that get it, I have a few problems coming to mind that I can solve with cog that I didn’t have a great solution to before. So I’m jumping on the bandwagon.