MobStacker

Evidence

Ran on Kiln's test stand (2026-11-04): MobStacker did not start: java.lang.NoSuchMethodError: 'boolean net.fabricmc.loader.api.FabricLoader.isModLoaded(java.lang.String)'.

What it needs from Kiln

• Mixin
• net.fabricmc.fabric.api.command.v2.CommandRegistrationCallback
• net.fabricmc.fabric.api.event.lifecycle.v1.CommonLifecycleEvents
• net.fabricmc.fabric.api.event.lifecycle.v1.CommonLifecycleEvents.TagsLoaded
• net.fabricmc.fabric.api.event.lifecycle.v1.ServerLifecycleEvents
• net.fabricmc.fabric.api.event.lifecycle.v1.ServerLifecycleEvents.ServerStarting
• net.fabricmc.fabric.api.event.lifecycle.v1.ServerLifecycleEvents.ServerStopped
• net.minecraft.commands.CommandSourceStack
• net.minecraft.commands.Commands
• net.minecraft.commands.Commands.CommandSelection
• net.minecraft.commands.SharedSuggestionProvider
• net.minecraft.commands.arguments.EntityArgument
• net.minecraft.core.RegistryAccess
• net.minecraft.core.RegistryAccess.Frozen
• net.minecraft.core.component.DataComponents
• net.minecraft.nbt.CompoundTag
• net.minecraft.nbt.ListTag
• net.minecraft.nbt.NumericTag
• net.minecraft.nbt.StringTag
• net.minecraft.nbt.Tag
• net.minecraft.network.chat.ClickEvent
• net.minecraft.network.chat.ClickEvent.RunCommand
• net.minecraft.network.chat.ClickEvent.SuggestCommand
• net.minecraft.network.chat.HoverEvent
• net.minecraft.network.chat.HoverEvent.ShowText
• net.minecraft.network.chat.Style
• net.minecraft.network.protocol.game.ClientboundSetEntityDataPacket
• net.minecraft.network.syncher.EntityDataAccessor
• net.minecraft.network.syncher.SynchedEntityData
• net.minecraft.network.syncher.SynchedEntityData.DataItem
• net.minecraft.network.syncher.SynchedEntityData.DataValue
• net.minecraft.server.MinecraftServer
• net.minecraft.server.level.ServerChunkCache
• net.minecraft.server.permissions.PermissionSet
• net.minecraft.server.permissions.Permissions
• net.minecraft.server.players.PlayerList
• net.minecraft.tags.DamageTypeTags
• net.minecraft.tags.TagKey
• net.minecraft.util.ProblemReporter
• net.minecraft.util.ProblemReporter.PathElement
• net.minecraft.util.ProblemReporter.ScopedCollector
• and 53 more

On the roadmap: Minecraft's libraries and client API (0.2), Code next to data (0.3), Mixin (0.5)

In the author's words

Greatly increases performance by stacking mobs together reducing the physical number of entities in the world with a config for further customization. Includes a mob cap module.

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file mobstacker-fabric-26.3-1.26.10.1.jar. The scan reads the mod's classes; it does not run them.