The plugin contains the following cheats:
1) Infinite Stamina
2) Have all Good Buffs
3) Bag Item x99
4) Bag Item quality Max
5) Fast farming 1 (after sowing)
6) Fast Farming 2 (after a day)
7) Feeding Animal (Max Affection and Always Happy after a day)
8) Feeding Animal Product S Rank (After a day)
9) Pet Lvl 10 (after a day)
If you need to cheat in a specific item, I recommend investing in a Powersaves device - I've tested its 3OT codes alongside plugin codes and I've never run into any problems. It's a bit less convenient but if you need the item or clothing codes in a hurry that's your best bet at the moment.
Thank you so much KariRaquan! The codes seem to be working so far, and these are all the major ones I wanted for the game.