NOTE: This code is not maintained anymore and IMHO not interesting since CVS and its pserver protocol must be totally uninteresting these days.
SqCVS is a clean implementation of the CVS pserver protocol in Squeak. It is written on top of SocketStream found in standard Squeak/Pharo images. SqCVS has no UI and it still doesn't know how to do "add" and "remove". But it knows how to do pretty much of the CVS protocol.