PreventPotions

Evidence

Ran on Kiln's test stand (2026-11-04): PreventPotionsMod did not start: java.lang.NoClassDefFoundError: net/fabricmc/fabric/api/event/player/UseItemCallback.

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.UseItemCallback
• net.fabricmc.fabric.api.networking.v1.ServerPlayConnectionEvents
• net.fabricmc.fabric.api.networking.v1.ServerPlayConnectionEvents.Join
• net.minecraft.commands.CommandSourceStack
• net.minecraft.commands.Commands
• net.minecraft.commands.Commands.CommandSelection
• net.minecraft.server.MinecraftServer
• net.minecraft.server.network.ServerGamePacketListenerImpl
• net.minecraft.server.permissions.PermissionLevel
• net.minecraft.server.players.PlayerList
• net.minecraft.world.entity.player.Inventory
• ServerPlayer.getInventory()
• ItemStack.is()
• Items.LINGERING_POTION
• Items.POTION
• Items.SPLASH_POTION
• Items.TIPPED_ARROW

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

In the author's words

PreventPotions is a lightweight Minecraft Paper plugin that lets server owners disable potion use and effects in different forms. It works out of the box with default settings, while still allowing full customization through config.yml.

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file PreventPotions-fabric-26.3-1.2.0.jar. The scan reads the mod's classes; it does not run them.