I don't use pass myself (I have severe NIH[1]), but its design has inspired me many times over: very, very few tools rise to the challenge of adhering to the Unix philosophy without cargo-culting it, and pass is one of them. I highly recommend that people looking to write engineer-friendly tools study its manpage[2].
Similarly, I wrote "hunter2" [0] to manage my passwords, for places where I'm still forced to use passwords. Although I didn't know of "pass" when I wrote it, it accomplishes the same goals. One difference is that it doesn't rely on PGP keys but just uses bare RSA keys from a smartcard. This is because the vast majority of authentication systems I work with use an X.509 certificate with an RSA key pair, hardly anything uses a password any more (since doing so requires a lot of paperwork).
[1]: https://github.com/woodruffw/kbs2
[2]: https://git.zx2c4.com/password-store/about/