clef is the Go Ethereum client's external signer (an external service that signs transactions).

bee-clef starts up a custom clef instance that is preconfigured to be suitable for bee's automated operation.

This repo contains the source files for building packages for various package managers and platforms.

It takes the original clef binary and starts it up as a service with a special configuration that is probably only suitable for bee.

bee can be configured to use other external signers, but bee-clef is probably not interesting outside the scope of being an external signer service for bee.

You probably want to follow the Swarm Bee manual, or head straight to the release download page.