I love the simplicity of Pass, but I wanted just a few more features, like being able to store (and retrieve) extra data easily. Unstructured data below the initial password wasn't really enough for me.
I ended up taking huge inspiration from Pass, but writing my own implementation[1] with a few more features that increased it's usefulness for my use cases.
I posted it a while ago on here[2] and Reddit[3], but it basically stores each entry as a Bash script, which gives it so much flexibility: auto-typing, references, multiple fields, executable functions, etc. I also wrote a blog post on it[4].
I'd be interested to hear what people think of if if anyone did/does end up giving it a go.
In my pass files, I put the password as the first line, optional username as second line, then I format the rest of the file as a YAML doc. So you can decrypt the file, scan for the first "---" and then everything after that is YAML (or multiple YAML docs if you have more "---").
Regardless, cool little set of programs you have!