Held Item Tooltips

Evidence

Ran on Kiln's test stand (2026-11-04): HeldItemTooltipsFabric did not start: java.lang.NoClassDefFoundError: net/minecraft/core/RegistryAccess; HeldItemTooltipsFabricClient did not start: java.lang.NoClassDefFoundError: net/minecraft/core/RegistryAccess.

What it needs from Kiln

• an access widener
• Mixin
• net.minecraft.client.OptionInstance
• net.minecraft.client.Options
• net.minecraft.client.gui.Hud
• net.minecraft.client.multiplayer.MultiPlayerGameMode
• net.minecraft.core.component.DataComponentMap
• net.minecraft.core.component.DataComponents
• net.minecraft.core.component.TypedDataComponent
• net.minecraft.network.chat.CommonComponents
• net.minecraft.network.chat.FormattedText
• net.minecraft.network.chat.Style
• net.minecraft.network.chat.contents.PlainTextContents
• net.minecraft.util.Mth
• net.minecraft.util.profiling.Profiler
• net.minecraft.util.profiling.ProfilerFiller
• net.minecraft.world.entity.EquipmentSlotGroup
• net.minecraft.world.entity.ai.attributes.AttributeModifier
• net.minecraft.world.entity.ai.attributes.AttributeModifier.Operation
• net.minecraft.world.entity.player.Inventory
• net.minecraft.world.item.AdventureModePredicate
• net.minecraft.world.item.DyeColor
• net.minecraft.world.item.Item.TooltipContext
• net.minecraft.world.item.ItemStackTemplate
• net.minecraft.world.item.TooltipFlag
• net.minecraft.world.item.TooltipFlag.Default
• net.minecraft.world.item.component.ItemAttributeModifiers
• net.minecraft.world.item.component.ItemAttributeModifiers.Display
• net.minecraft.world.item.component.ItemAttributeModifiers.Display.Type
• net.minecraft.world.item.component.ItemContainerContents
• net.minecraft.world.item.component.TooltipDisplay
• net.minecraft.world.item.component.TooltipProvider
• net.minecraft.world.item.equipment.trim.ArmorTrim
• org.apache.logging.log4j.LogManager
• net.minecraft.core.RegistryAccess
• Minecraft.gameMode
• Minecraft.options
• Font.width()
• Gui.hud
• GuiGraphicsExtractor.centeredText()
• GuiGraphicsExtractor.pose()
• LocalPlayer.getInventory()
• and 22 more

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

See item enchantments, potion effects, shulker box contents and much more directly above your hotbar.

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file helditemtooltips-v26.3.0-mc26.3.x+fabric.jar. The scan reads the mod's classes; it does not run them.