I have an application that is a UI, an API, and a backing db for the API. All three are in different repos.

The state of each is (typically) tightly-bound to the others, i.e., if I make a change in the UI, it generally needs a change in the API, and that generally needs a change in the db schema.

My problem is that, given a commit id in one repo, there’s no way to know what commit in the other repos is compatible. Is there a Git-based solution to this?

I’ve considered tagging, but that relies on the developers getting it right.

TIA.