Instant Feedback

Evidence

Ran on Kiln's test stand (2026-11-04): InstantFeedback did not start: java.lang.NoClassDefFoundError: net/minecraft/core/HolderGetter; InstantFeedbackClient did not start: java.lang.NoClassDefFoundError: net/minecraft/core/particles/ParticleType.

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.AttributesContext
• net.fabricmc.fabric.api.biome.v1.BiomeModificationContext.GenerationSettingsContext
• 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.client.particle.v1.ParticleProviderRegistry
• net.fabricmc.fabric.api.client.particle.v1.ParticleProviderRegistry.PendingParticleProvider
• net.fabricmc.fabric.api.item.v1.ItemComponentTooltipProviderRegistry
• net.fabricmc.fabric.api.particle.v1.FabricParticleTypes
• net.fabricmc.fabric.api.resource.conditions.v1.ResourceCondition
• net.fabricmc.fabric.api.resource.conditions.v1.ResourceConditionType
• net.fabricmc.fabric.api.resource.conditions.v1.ResourceConditions
• net.fabricmc.fabric.api.tag.convention.v2.ConventionalBiomeTags
• net.minecraft.advancements.predicates.DamageSourcePredicate
• net.minecraft.advancements.predicates.DamageSourcePredicate.Builder
• net.minecraft.advancements.predicates.DataComponentMatchers
• net.minecraft.advancements.predicates.DataComponentMatchers.Builder
• net.minecraft.advancements.predicates.entity.EntityPredicate
• net.minecraft.advancements.predicates.entity.EntityPredicate.Builder
• net.minecraft.advancements.triggers.CriteriaTriggers
• net.minecraft.advancements.triggers.SummonedEntityTrigger
• net.minecraft.client.particle.FallingLeavesParticle
• net.minecraft.client.particle.FlameParticle
• net.minecraft.client.particle.FlameParticle.Provider
• net.minecraft.client.particle.ParticleProvider
• net.minecraft.client.particle.SimpleAnimatedParticle
• net.minecraft.client.particle.SingleQuadParticle
• net.minecraft.client.particle.SingleQuadParticle.Layer
• net.minecraft.client.particle.SpriteSet
• net.minecraft.core.ClientAsset
• net.minecraft.core.ClientAsset.ResourceTexture
• net.minecraft.core.Direction.Axis
• net.minecraft.core.Direction.Plane
• net.minecraft.core.HolderGetter
• net.minecraft.core.HolderLookup.RegistryLookup
• net.minecraft.core.HolderSet
• net.minecraft.core.HolderSet.Named
• and 81 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

Implements the most requested features from feedback.minecraft.net

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file instantfeedback-4.1.1+26.3.jar. The scan reads the mod's classes; it does not run them.