Book Copy

Evidence

Ran on Kiln's test stand (2026-11-04): BookCopyFabric did not start: java.lang.NoClassDefFoundError: net/minecraft/network/protocol/Packet.

What it needs from Kiln

• Mixin
• net.fabricmc.fabric.api.client.command.v2.ClientCommandRegistrationCallback
• net.minecraft.client.GameNarrator
• net.minecraft.client.gui.Hud
• net.minecraft.client.gui.components.ChatComponent
• net.minecraft.commands.SharedSuggestionProvider
• net.minecraft.core.component.DataComponents
• net.minecraft.nbt.CompoundTag
• net.minecraft.nbt.NbtIo
• net.minecraft.nbt.NbtOps
• net.minecraft.network.chat.ClickEvent
• net.minecraft.network.chat.ClickEvent.SuggestCommand
• net.minecraft.network.chat.Style
• net.minecraft.network.protocol.game.ServerboundEditBookPacket
• net.minecraft.server.network.Filterable
• net.minecraft.world.entity.player.Inventory
• net.minecraft.world.item.component.BookContent
• net.minecraft.world.item.component.WrittenBookContent
• net.minecraft.network.protocol.Packet
• Minecraft.getNarrator()
• Gui.hud
• ClientPacketListener.send()
• LocalPlayer.connection
• LocalPlayer.getInventory()
• MutableComponent.withStyle()
• ItemStack.get()
• ItemStack.is()
• Items.WRITABLE_BOOK
• Items.WRITTEN_BOOK

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

This mod adds a simple client-side /bookcopy command, which allows you to save written books and import them later in another book.

Scan

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