The variable has been included since TES3MP's earliest proof of concept, but never used for anything. It is now possible to get and set it, due to semi-popular demand.
Rename the old WorldKillCount that was a Player packet into PlayerPlaceholder. Rename the unused CellCreate that was a Worldstate packet into WorldKillCount. On the server, move kill count-related script functions from QuestFunctions to WorldstateFunctions.
Previously, creatures with fast spellcasting animations would cast their spells before their success had actually been calculated, causing them to fail.
Originally, the PlayerSkill packet contained skills, attribute increases and level progress. In 78441c769a, the attribute increases were moved to the PlayerAttribute packet and the level progress was moved to the PlayerLevel packet, but – due to an oversight – attribute increases and level progress were still being applied to the local player only when a PlayerSkill packet was received, based on whatever values were stored from the last PlayerAttribute and PlayerLevel packets.
Previously, multiple stacks of the same item ID could overwrite data in each other because of how the logic in ContainerStore::add() works. For example, a stack of 5 grand soul gems with no souls would get added to the player, then the attempt to add a grand soul gem with a particular soul would retrieve the previous stack first before setting all of it to that soul, resulting in 6 grand soul gems with that soul.
Previously, client mods adding packet-sending scripts to the spawn area made clients send the associated packets as soon as they inputted their character name when joining a server using those mods. This made the clients either get disconnected for not replying to a handshake first, or it made them get kicked for sending object packets that are disallowed for players who are not logged in.
To fix this, LocalPlayer's hasFinishedCharGen() has been replaced with isLoggedIn(), because the former was already returning true when players inputted their names.
Whenever an item is added to or removed from the player's ContainerStore, that player sends a PlayerInventory packet with just that addition or removal.
This eliminates all the unnecessary packet spam related to oversized PlayerInventory packets that had existed in one form or another since the initial implementation of inventory sync in 1b259e2d33
Additionally, move booleans from BasePlayer to LocalPlayer when they are only needed on the client, and make the usage of the isReceivingQuickKeys boolean consistent with the new isReceivingInventory boolean by having them both in the processors of their associated packets.
For a long time, whenever a PlayerInventory packet was sent, it contained all the items in the player's inventory, because that's how Koncord originally implemented it and I always had too many other priorities to go back and rework it.
From now on, clients only send PlayerInventory packet with the one item added or removed, with the single exception being trading with merchants, where the entire inventory is still sent for the time being.