Item Editor - Component & NBT

Evidence

Ran on Kiln's test stand (2026-11-04): ItemEditorClient did not start: java.lang.NoClassDefFoundError: net/minecraft/nbt/Tag.

What it needs from Kiln

• com.mojang.authlib.GameProfile
• com.mojang.authlib.properties.Property
• com.mojang.authlib.properties.PropertyMap
• com.mojang.blaze3d.platform.InputConstants.Key
• com.mojang.blaze3d.platform.TextInputManager
• com.mojang.blaze3d.platform.Window
• com.mojang.math.Transformation
• io.netty.buffer.Unpooled
• net.fabricmc.fabric.api.client.command.v2.ClientCommandRegistrationCallback
• net.fabricmc.fabric.api.client.command.v2.ClientCommands
• net.fabricmc.fabric.api.client.command.v2.FabricClientCommandSource
• net.fabricmc.fabric.api.client.networking.v1.ClientPlayConnectionEvents
• net.fabricmc.fabric.api.client.networking.v1.ClientPlayConnectionEvents.Disconnect
• net.fabricmc.fabric.api.client.networking.v1.ClientPlayConnectionEvents.Join
• net.fabricmc.loader.api.ModContainer
• net.fabricmc.loader.api.Version
• net.fabricmc.loader.api.metadata.CustomValue
• net.fabricmc.loader.api.metadata.ModMetadata
• net.minecraft.SharedConstants
• net.minecraft.WorldVersion
• net.minecraft.advancements.predicates.BlockPredicate
• net.minecraft.advancements.predicates.DataComponentMatchers
• net.minecraft.advancements.predicates.ItemPredicate
• net.minecraft.advancements.predicates.MinMaxBounds
• net.minecraft.advancements.predicates.MinMaxBounds.Ints
• net.minecraft.client.KeyboardHandler
• net.minecraft.client.MouseHandler
• net.minecraft.client.Options
• net.minecraft.client.StringSplitter
• net.minecraft.client.User
• net.minecraft.client.gui.GuiGraphicsExtractor.HoveredTextEffects
• net.minecraft.client.gui.components.AbstractWidget
• net.minecraft.client.gui.components.Button
• net.minecraft.client.gui.components.Button.Builder
• net.minecraft.client.gui.components.Button.OnPress
• net.minecraft.client.gui.components.EditBox
• net.minecraft.client.gui.components.MultiLineTextWidget
• net.minecraft.client.gui.components.MultilineTextField
• net.minecraft.client.gui.components.Tooltip
• net.minecraft.client.gui.components.Whence
• and 81 more

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

In the author's words

Client-side item, component and NBT editor for Fabric. Customize held items, edit NBT data, and modify item components via an extensible GUI.

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file Item Editor-26.3-b25.jar. The scan reads the mod's classes; it does not run them.