Instrumentum

Evidence

Ran on Kiln's test stand (2026-11-04): Instrumentum did not start: java.lang.NoSuchMethodError: 'boolean net.fabricmc.loader.api.FabricLoader.isDevelopmentEnvironment()'; InstrumentumClient did not start: java.lang.NoSuchMethodError: 'boolean net.fabricmc.loader.api.FabricLoader.isDevelopmentEnvironment()'.

What it needs from Kiln

• Mixin
• net.fabricmc.fabric.api.attachment.v1.AttachmentRegistry
• net.fabricmc.fabric.api.attachment.v1.AttachmentRegistry.Builder
• net.fabricmc.fabric.api.attachment.v1.AttachmentSyncPredicate
• net.fabricmc.fabric.api.client.event.lifecycle.v1.ClientTickEvents.EndLevelTick
• net.fabricmc.fabric.api.event.lifecycle.v1.ServerTickEvents
• net.fabricmc.fabric.api.event.lifecycle.v1.ServerTickEvents.EndLevelTick
• net.minecraft.advancements.predicates.DamageSourcePredicate
• net.minecraft.advancements.predicates.DamageSourcePredicate.Builder
• net.minecraft.client.Camera
• net.minecraft.client.OptionInstance
• net.minecraft.client.Options
• net.minecraft.client.renderer.GameRenderer
• net.minecraft.client.renderer.culling.Frustum
• net.minecraft.client.renderer.extract.LevelExtractor
• net.minecraft.core.HolderGetter
• net.minecraft.core.HolderLookup.RegistryLookup
• net.minecraft.core.HolderSet
• net.minecraft.core.HolderSet.Direct
• net.minecraft.core.HolderSet.Named
• net.minecraft.core.component.DataComponentType
• net.minecraft.core.component.DataComponentType.Builder
• net.minecraft.core.particles.ParticleOptions
• net.minecraft.core.particles.ParticleTypes
• net.minecraft.data.worldgen.BootstrapContext
• net.minecraft.network.codec.ByteBufCodecs
• net.minecraft.network.codec.StreamCodec
• net.minecraft.network.codec.StreamCodec.CodecOperation
• net.minecraft.tags.ItemTags
• net.minecraft.tags.TagKey
• net.minecraft.util.Mth
• net.minecraft.util.Unit
• net.minecraft.util.Util
• net.minecraft.world.TickRateManager
• net.minecraft.world.entity.EquipmentSlotGroup
• net.minecraft.world.entity.Mob
• net.minecraft.world.entity.player.Abilities
• net.minecraft.world.item.enchantment.ConditionalEffect
• net.minecraft.world.item.enchantment.Enchantment
• net.minecraft.world.item.enchantment.Enchantment.Builder
• net.minecraft.world.item.enchantment.Enchantment.Cost
• and 54 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

Adds essential enchantments to elevate your tools: Vein Mining, Excavate, Grapple, and more.

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file instrumentum-1.1.0-26.3.jar. The scan reads the mod's classes; it does not run them.