This plugin tries to disable the so-called "book banning" edge case, which is achieved by filling a writable book to the brim with UTF-8 characters, chosen to take the most bytes, in order to make it blow up in size. These books are then duplicated and filled into various containers like ordinary chests, shulker boxes and the like, which - when transmitted over the network - blow read/write limiters, that cause an exception in the player's netty pipe, which then again closes the connection. Item entities in chunks, items in the inventory, opened containers, etc. can all cause this disconnect and thus, if done right, cause the player to be unable to join again without being disconnected almost instantly.
When a container block is about to be broken, it's inventory is checked.
When an inventory is about to be opened, it is checked.
When an item is about to be dropped, it is checked.
When an item is about to be picked up, it is checked. The player inventory is checked at the next tick, to ensure that if the player already holds malicious items, the total size of the inventory update will still end up below the threshold. This is a countermeasure against kicking players by giving them books incrementally.
When a player is about to join the server, their inventory is checked.
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