I wrote a pass-like password manager that's built using a layered architecture and one of the lower layers basically fits your exact use-case! The three layers that make up the password manager are:

- securestore - An encrypted file store - vcstore - A version controlled file store - pass - Password manager functionality

Each layer builds on the last, so in your case, you could just use the vcstore layer directly without the password manager functionality. I wrote a blog post on it[1] if it sounds interesting.

[1]: https://vimist.github.io/2020/04/12/A-New-Password-Manager.h...

Great use case!

That's a nice idea.