Head Index

Calls something that is on Kiln's roadmap. Parts of it may already run.

Evidence

Ran on Kiln's test stand (2026-11-04): HeadIndex did not start: java.lang.NoClassDefFoundError: net/fabricmc/fabric/api/transfer/v1/transaction/TransactionContext.

What it needs from Kiln

Mixin
com.mojang.authlib.GameProfile
com.mojang.authlib.GameProfileRepository
com.mojang.authlib.minecraft.SessionService
com.mojang.authlib.properties.Property
com.mojang.authlib.properties.PropertyMap
com.mojang.authlib.services.ProfileResult
com.mojang.authlib.services.response.NameAndId
net.fabricmc.fabric.api.command.v2.CommandRegistrationCallback
net.fabricmc.fabric.api.permission.v1.PermissionPredicates
net.fabricmc.fabric.api.transfer.v1.item.ItemVariant
net.fabricmc.fabric.api.transfer.v1.item.PlayerInventoryStorage
net.fabricmc.fabric.api.transfer.v1.transaction.Transaction
net.minecraft.commands.CommandSourceStack
net.minecraft.commands.Commands
net.minecraft.commands.Commands.CommandSelection
net.minecraft.commands.arguments.GameProfileArgument
net.minecraft.core.component.DataComponents
net.minecraft.network.chat.ClickEvent
net.minecraft.network.chat.ClickEvent.OpenUrl
net.minecraft.network.chat.Style
net.minecraft.server.MinecraftServer
net.minecraft.server.Services
net.minecraft.server.permissions.PermissionLevel
net.minecraft.server.players.NameAndId
net.minecraft.tags.TagKey
net.minecraft.util.Prediction
net.minecraft.world.entity.player.Inventory
net.minecraft.world.inventory.AbstractContainerMenu
net.minecraft.world.inventory.MenuType
net.minecraft.world.item.component.ItemLore
net.minecraft.world.item.component.ResolvableProfile
net.minecraft.world.level.block.ColorCollection
org.apache.commons.io.FileUtils
org.apache.logging.log4j.LogManager
org.apache.logging.log4j.Logger
net.fabricmc.fabric.api.transfer.v1.transaction.TransactionContext
MutableComponent.setStyle()
MutableComponent.withStyle()
Identifier.tryParse()
ServerLevel.getServer()
and 19 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

An easy to use, server-side head database mod for the Fabric Loader.

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file headindex-1.2.2.jar. The scan reads the mod's classes; it does not run them.

Reports from players

No reports from players yet.

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