I wrote a similar password manager (without knowing that pass already exists): https://github.com/snoack/mypass

But I ended up storing everything into one single encrypted file, rather than having one file per password. Though I see the point about the UNIX philosophy (i.e. "everything is a file"), but that way you'd leak information, i.e. what the passwords stored are for.

Anyway, I'd appreciate any feedback on mypass.