Cooperative End Access

Evidence

Ran on Kiln's test stand (2026-11-04): CooperativeEndAccessFabric did not start: java.lang.NoClassDefFoundError: net/fabricmc/fabric/api/event/lifecycle/v1/ServerLifecycleEvents.

What it needs from Kiln

• com.mojang.authlib.GameProfile
• net.fabricmc.fabric.api.entity.event.v1.ServerLivingEntityEvents
• net.fabricmc.fabric.api.entity.event.v1.ServerLivingEntityEvents.AfterDeath
• net.fabricmc.fabric.api.event.lifecycle.v1.ServerLifecycleEvents
• net.fabricmc.fabric.api.event.lifecycle.v1.ServerLifecycleEvents.ServerStarted
• net.fabricmc.fabric.api.event.lifecycle.v1.ServerLifecycleEvents.ServerStopping
• net.fabricmc.fabric.api.event.lifecycle.v1.ServerTickEvents
• net.fabricmc.fabric.api.event.lifecycle.v1.ServerTickEvents.EndTick
• net.fabricmc.fabric.api.event.player.PlayerBlockBreakEvents
• net.fabricmc.fabric.api.event.player.PlayerBlockBreakEvents.After
• net.fabricmc.fabric.api.event.player.UseBlockCallback
• net.minecraft.core.particles.ParticleTypes
• net.minecraft.core.particles.PowerParticleOption
• net.minecraft.server.MinecraftServer
• net.minecraft.server.players.PlayerList
• net.minecraft.util.Prediction
• net.minecraft.world.entity.EntityTypes
• net.minecraft.world.entity.item.ItemEntity
• net.minecraft.world.entity.player.Inventory
• net.minecraft.world.level.block.EndPortalFrameBlock
• ServerLevel.sendParticles()
• ServerPlayer.drop()
• ServerPlayer.getGameProfile()
• ServerPlayer.getInventory()
• ServerPlayer.isDeadOrDying()
• ServerPlayer.playSound()
• ServerPlayer.position()
• ServerPlayer.sendSystemMessage()
• SoundEvents.END_PORTAL_FRAME_FILL
• SoundEvents.NOTE_BLOCK_BASS
• LivingEntity.getType()
• ItemStack.is()
• Items.ENDER_EYE
• Blocks.END_PORTAL
• Blocks.END_PORTAL_FRAME
• Vec3.add()
• Vec3.normalize()
• Vec3.scale()
• Vec3.subtract()

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

In the author's words

Softly restrict the End with vanilla-ish gameplay mechanics that make sure your SMP's dragon fight is always a group activity!

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file CooperativeEndAccess-fabric-0.2.2+26.3.jar. The scan reads the mod's classes; it does not run them.