I setup a fresh forge project in IntelliJ and added the repo and dependency for Charset in my build.gradle file exactly as stated in the readme.
Starting the client works and Charset is loaded without any problems. I then wanted to update to the latest available version of the mod 0.5.0.248, so I changed the version number in the build.gradle file and updated the dependencies in my IDE. When starting the client again I get a MissingModsException:

MissingModsException: Mod simplelogic (SimpleLogic) requires [charset]

I then opened up the charset jar in my dependencies and saw, that it only contains the SimpleLogic packages and classes, no Charset. I went back and the last working version is indeed 0.5.0.119. It looks like Versions 0.5.0.220 and higher all have the wrong content. Checking the latest jenkins build (0.5.0.248) however seems okay, so there must be some mixup when publishing to the maven repo. Does SimpleLogic maybe overwrite something? Thanks.

I've been semi-aware, but the Maven/CI situation of Charset is a big, big mess right now. I'll fix it, but not very soon unfortunately.

Any reason for depending on Charset, by the way? I'm curious!