Getting started with CraftCMS 3.1's project config files and I can't find any documentation about whether
storage/config-deltas/delta.yaml should be committed to git
No, you would not check these files into Git.
I have a
.gitignore rule to just ignore everything in
storage/ and so I treat it as a cache directory.
Which it is... except for the unfortunate fact that any rebrand (logo, icon) files are stored in
storage/ as well. But I just manually add them in via
git add -f