Isn't this exactly what the radio feature does?

i thought the radio feature played a fixed set of five random songs over and over and over.

Well, that will happen if you pick an artist that is somewhat obscure, to be sure.

I wrote a fairly similar library that additionally uses data from last.fm and pandora, and supports compiling by track similarity as well: https://github.com/gwicke/compilation

I'm using it to power the auto-playlist feature in my fork of https://github.com/andrewrk/groovebasin, a node music player.

I also wrote something like this! Mine is in Python rather than Node and it allows you to download mp3s of the songs: https://github.com/schollz/playlistfromsong

Having never used Spotify, what is this doing that is notable?

So...pandora?

Why is this named "Npm"?

It isn't, it's called singlespotify. I think the submitter was thrown off since it's installed using npm.

The submitter is the creator.

It's actually called singlespotify. Post title is misleading.

https://github.com/kabirvirji/singlespotify/commits/master thoes are some high quality, descriptive commit messages

almost as if it's a fun hobby project!

scroll down you'll see some better ones