DeepUnderWorld

Evidence

Ran on Kiln's test stand (2026-11-04): DeepUnderWorld did not start: java.lang.NoSuchFieldError: Class net.minecraft.core.registries.Registries does not have member field 'net.minecraft.resources.ResourceKey POINT_OF_INTEREST_TYPE'.

What it needs from Kiln

• an access widener
• Mixin
• net.fabricmc.fabric.api.biome.v1.BiomeModification
• net.fabricmc.fabric.api.biome.v1.BiomeModificationContext
• net.fabricmc.fabric.api.biome.v1.BiomeModificationContext.MobSpawnSettingsContext
• net.fabricmc.fabric.api.biome.v1.BiomeModifications
• net.fabricmc.fabric.api.biome.v1.BiomeSelectionContext
• net.fabricmc.fabric.api.biome.v1.ModificationPhase
• net.fabricmc.fabric.api.creativetab.v1.FabricCreativeModeTab
• net.fabricmc.fabric.api.event.registry.DynamicRegistrySetupCallback
• net.fabricmc.fabric.api.event.registry.DynamicRegistryView
• net.minecraft.advancements.predicates.LocationPredicate
• net.minecraft.advancements.predicates.LocationPredicate.Builder
• net.minecraft.core.BlockPos.MutableBlockPos
• net.minecraft.core.Direction.Axis
• net.minecraft.core.Direction.AxisDirection
• net.minecraft.core.RegistrationInfo
• net.minecraft.core.RegistryAccess
• net.minecraft.core.particles.ParticleTypes
• net.minecraft.references.BlockItemId
• net.minecraft.server.MinecraftServer
• net.minecraft.tags.BlockTags
• net.minecraft.tags.TagKey
• net.minecraft.util.BlockUtil
• net.minecraft.util.BlockUtil.FoundRectangle
• net.minecraft.util.Mth
• net.minecraft.util.valueproviders.UniformInt
• net.minecraft.world.Difficulty
• net.minecraft.world.attribute.EnvironmentAttributeSystem
• net.minecraft.world.attribute.EnvironmentAttributes
• net.minecraft.world.entity.EntityDimensions
• net.minecraft.world.entity.EntitySpawnReason
• net.minecraft.world.entity.EntityType
• net.minecraft.world.entity.EntityTypes
• net.minecraft.world.entity.MobCategory
• net.minecraft.world.entity.Relative
• net.minecraft.world.entity.ai.village.poi.PoiManager
• net.minecraft.world.entity.ai.village.poi.PoiManager.Occupancy
• net.minecraft.world.entity.ai.village.poi.PoiRecord
• net.minecraft.world.entity.ai.village.poi.PoiType
• net.minecraft.world.entity.ai.village.poi.PoiTypes
• net.minecraft.world.entity.player.Abilities
• and 80 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

The new dimension of the Underworld has changed the way to Nether dimension.

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file deepunderworld-1.7-mc26.3-fabric.jar. The scan reads the mod's classes; it does not run them.