Breakable Blocks

Evidence

Ran on Kiln's test stand (2026-11-04): ObtainableEnd did not start: java.lang.NoClassDefFoundError: net/minecraft/world/entity/item/ItemEntity; ObtainableEndClient did not start: java.lang.NoClassDefFoundError: net/minecraft/network/protocol/common/custom/CustomPacketPayload.

What it needs from Kiln

• Mixin
• net.fabricmc.fabric.api.client.networking.v1.ClientPlayNetworking
• net.fabricmc.fabric.api.client.networking.v1.ClientPlayNetworking.Context
• net.fabricmc.fabric.api.client.networking.v1.ClientPlayNetworking.PlayPayloadHandler
• net.fabricmc.fabric.api.event.player.AttackBlockCallback
• net.fabricmc.fabric.api.event.player.PlayerBlockBreakEvents
• net.fabricmc.fabric.api.event.player.PlayerBlockBreakEvents.After
• net.fabricmc.fabric.api.event.player.PlayerBlockBreakEvents.Before
• net.fabricmc.fabric.api.networking.v1.PayloadTypeRegistry
• net.fabricmc.fabric.api.networking.v1.ServerPlayNetworking
• net.minecraft.core.component.DataComponents
• net.minecraft.network.FriendlyByteBuf
• net.minecraft.network.RegistryFriendlyByteBuf
• net.minecraft.network.protocol.common.custom.CustomPacketPayload
• net.minecraft.network.protocol.common.custom.CustomPacketPayload.Type
• net.minecraft.network.protocol.common.custom.CustomPacketPayload.TypeAndCodec
• net.minecraft.server.MinecraftServer
• net.minecraft.server.players.PlayerList
• net.minecraft.world.entity.EntityType
• net.minecraft.world.entity.EntityTypes
• net.minecraft.world.entity.ExperienceOrb
• net.minecraft.world.entity.item.ItemEntity
• net.minecraft.world.item.component.Tool
• net.minecraft.world.item.component.Tool.Rule
• net.minecraft.world.level.BaseSpawner
• net.minecraft.world.level.block.entity.SpawnerBlockEntity
• Minecraft.execute()
• Entity.getType()
• ItemStack.get()
• ItemStack.is()
• ItemStack.isCorrectToolForDrops()
• Items.ALLAY_SPAWN_EGG
• Items.ARMADILLO_SPAWN_EGG
• Items.AXOLOTL_SPAWN_EGG
• Items.BAT_SPAWN_EGG
• Items.BEE_SPAWN_EGG
• Items.BLAZE_SPAWN_EGG
• Items.BOGGED_SPAWN_EGG
• Items.BREEZE_SPAWN_EGG
• Items.CAMEL_HUSK_SPAWN_EGG
• Items.CAMEL_SPAWN_EGG
• and 45 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

Make Blocks like End Portal Frame and Spawner Breakable and Obtainable in survival

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file breakable-blocks-1.5.0.jar. The scan reads the mod's classes; it does not run them.