Well, not the UI part. And it's probably buggy as hell* - be warned - but It Works For Me ^TM. (And issues/PRs more than welcome!)
[0] - https://github.com/OJFord/passbase
* A big part of my motivation to do it was as a toy thing to learn some Rust, so it has all the hall marks of someone kludging around trying to learn something new. Critiques/"WTH ARE YOU DOING"/PRs with style improvements also welcome :)
While I didn't try it myself (I just run my own git server), symlinking the directory of that to kbfs (or maybe just create a git repo there and make some magic to locally push stuff) should work.
It's actually more along the lines of the latter I wanted to do with Passbase - seeing as it's already using KBFS it would be (relatively) easy to do password sharing, just throw it in a shared private folder.
I was thinking more of the shared pizza-order password with room-mates, or groceries, bill-paying - whatever - than professional teams, though.
I digress, yes, I'd definitely recommend using Pass over anything I've cobbled together!