uuidswap

Calls something that is on Kiln's roadmap. Parts of it may already run.

Evidence

Ran on Kiln's test stand (2026-11-04): Uuid did not start: java.lang.NoClassDefFoundError: net/fabricmc/fabric/api/networking/v1/ServerPlayConnectionEvents.

What it needs from Kiln

Mixin
net.fabricmc.fabric.api.command.v2.CommandRegistrationCallback
net.fabricmc.fabric.api.event.lifecycle.v1.ServerTickEvents
net.fabricmc.fabric.api.event.lifecycle.v1.ServerTickEvents.EndTick
net.fabricmc.fabric.api.event.player.UseEntityCallback
net.fabricmc.fabric.api.networking.v1.ServerPlayConnectionEvents
net.fabricmc.fabric.api.networking.v1.ServerPlayConnectionEvents.Disconnect
net.minecraft.commands.CommandSourceStack
net.minecraft.commands.Commands
net.minecraft.commands.Commands.CommandSelection
net.minecraft.commands.arguments.UuidArgument
net.minecraft.core.component.DataComponentType
net.minecraft.core.component.DataComponents
net.minecraft.server.MinecraftServer
net.minecraft.server.Services
net.minecraft.server.network.ServerGamePacketListenerImpl
net.minecraft.server.permissions.PermissionCheck
net.minecraft.server.players.NameAndId
net.minecraft.server.players.PlayerList
net.minecraft.server.players.UserNameToIdResolver
net.minecraft.world.SimpleContainer
net.minecraft.world.SimpleMenuProvider
net.minecraft.world.entity.EntityReference
net.minecraft.world.entity.TamableAnimal
net.minecraft.world.inventory.ChestMenu
net.minecraft.world.inventory.MenuType
net.minecraft.world.item.component.ItemLore
net.minecraft.world.item.component.ResolvableProfile
net.minecraft.world.level.block.ColorCollection
net.minecraft.world.level.storage.LevelResource
ServerLevel.getAllEntities()
ServerLevel.getServer()
ServerPlayer.closeContainer()
ServerPlayer.connection
ServerPlayer.isShiftKeyDown()
ServerPlayer.openMenu()
ServerPlayer.permissions()
ServerPlayer.sendSystemMessage()
ItemStack.is()
ItemStack.set()
Items.ARROW
and 4 more

On the roadmap: Code next to data (0.3), Machines (0.4), Mixin (0.5)

In the author's words

Copy/replace player save data by UUID, with pet owner transfer support.

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file uuid-fabric-26.3-1.0.0+26.3.jar. The scan reads the mod's classes; it does not run them.

Reports from players

No reports from players yet.

Thank you. Your report is counted.