We're likely to start with a regeneration flow of "regenerate everything whether we think it's changed or not".

We might want to optimize this by checking for commits in the API paths since the last-generated-commit per library, and only regenerate a library if there are any such commits. (This is what v0.1.0 does, so the code should be easy to find.) That would also allow us to create a commit saying "I've regenerated libraries X, Y and Z" without having to detect which libraries have actually changed.

Currently setting as 0.2.0, but could easily move.