Server-Side Horror

Evidence

Ran on Kiln's test stand (2026-11-04): ServersideHorror did not start: java.lang.NoClassDefFoundError: net/minecraft/server/level/ServerEntity$Synchronizer.

What it needs from Kiln

• Mixin
• com.mojang.authlib.GameProfile
• com.mojang.authlib.properties.Property
• com.mojang.authlib.properties.PropertyMap
• net.fabricmc.fabric.api.command.v2.CommandRegistrationCallback
• net.minecraft.commands.CommandSourceStack
• net.minecraft.commands.Commands
• net.minecraft.commands.Commands.CommandSelection
• net.minecraft.commands.arguments.EntityArgument
• net.minecraft.core.BlockPos.MutableBlockPos
• net.minecraft.core.Direction.Plane
• net.minecraft.core.component.DataComponents
• net.minecraft.core.particles.DustParticleOptions
• net.minecraft.network.Connection
• net.minecraft.network.chat.ClickEvent
• net.minecraft.network.chat.ClickEvent.RunCommand
• net.minecraft.network.chat.HoverEvent
• net.minecraft.network.chat.HoverEvent.ShowText
• net.minecraft.network.chat.Style
• net.minecraft.network.protocol.PacketFlow
• net.minecraft.network.protocol.game.ClientboundAddEntityPacket
• net.minecraft.network.protocol.game.ClientboundPlayerInfoRemovePacket
• net.minecraft.network.protocol.game.ClientboundPlayerInfoUpdatePacket
• net.minecraft.network.protocol.game.ClientboundPlayerInfoUpdatePacket.Action
• net.minecraft.network.protocol.game.ClientboundRemoveEntitiesPacket
• net.minecraft.network.protocol.game.ClientboundSetEntityDataPacket
• net.minecraft.network.syncher.SynchedEntityData
• net.minecraft.network.syncher.SynchedEntityData.DataValue
• net.minecraft.server.MinecraftServer
• net.minecraft.server.level.ServerEntity
• net.minecraft.server.level.ServerEntity.Synchronizer
• net.minecraft.server.network.CommonListenerCookie
• net.minecraft.server.network.ServerGamePacketListenerImpl
• net.minecraft.server.players.PlayerList
• net.minecraft.util.Mth
• net.minecraft.world.clock.ServerClockManager
• net.minecraft.world.entity.Entity.RemovalReason
• net.minecraft.world.entity.EntitySpawnReason
• net.minecraft.world.entity.EntityType
• net.minecraft.world.entity.EntityTypes
• net.minecraft.world.entity.LightningBolt
• and 80 more

On the roadmap: Minecraft's libraries and client API (0.2), Code next to data (0.3), Machines (0.4), Mixin (0.5)

In the author's words

Fully Configurable Ambient Horror Mod

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file serversidehorror-26.3-fabric-5.1.jar. The scan reads the mod's classes; it does not run them.