In day 4 I mentioned that only 4 indexed config libraries are marked as "client only". This seems like not a lot, but only two config libraries I know of would be marked as "server only"; QoMC and MonkeyLib538 (I know, both of these work in singleplayer too, but neither of them have any functionality for client side).
QoMC is a config library designed to auto-generate commands based on existing Kaleido Config configs. Just like McQoy, Integration is implicit; you don't need to do anything to get it to work.
MonkeyLib538 (Mentioned in day 6) does a similar thing, except works with OffsetUtils538 instead of Kaleido Config, though unlike QoMC does need manual initialization.
Bonus fact: The only pure-java config libraries are OffsetUtils538, Kaleido Config, and Gson!
Bonus bonus fact: The only config libraries that provide a ui and are server-only are MonkeyLib538 and QoMC, because why would you write a config library that is server-only, but doesn't have a ui. Guess you'd make a library to mixin into options.txt :clueless: