MicroTimingReplay

Evidence

Ran on Kiln's test stand (2026-11-04): MicroTimingReplay did not start: java.lang.NoClassDefFoundError: net/minecraft/nbt/Tag; MTRClient did not start: java.lang.NoClassDefFoundError: net/minecraft/network/protocol/common/custom/CustomPacketPayload.

What it needs from Kiln

• Mixin
• com.mojang.blaze3d.platform.InputConstants.Key
• com.mojang.blaze3d.platform.Window
• com.mojang.math.Transformation
• net.fabricmc.fabric.api.client.networking.v1.ClientPlayConnectionEvents
• net.fabricmc.fabric.api.client.networking.v1.ClientPlayConnectionEvents.Disconnect
• net.fabricmc.fabric.api.client.networking.v1.ClientPlayConnectionEvents.Join
• net.fabricmc.fabric.api.client.networking.v1.ClientPlayNetworking
• net.fabricmc.fabric.api.client.networking.v1.ClientPlayNetworking.Context
• net.fabricmc.fabric.api.client.networking.v1.ClientPlayNetworking.PlayPayloadHandler
• net.fabricmc.fabric.api.command.v2.CommandRegistrationCallback
• net.fabricmc.fabric.api.event.lifecycle.v1.ServerLifecycleEvents
• net.fabricmc.fabric.api.event.lifecycle.v1.ServerLifecycleEvents.ServerStarted
• net.fabricmc.fabric.api.event.lifecycle.v1.ServerLifecycleEvents.ServerStopped
• net.fabricmc.fabric.api.event.lifecycle.v1.ServerLifecycleEvents.ServerStopping
• net.fabricmc.fabric.api.event.lifecycle.v1.ServerTickEvents
• net.fabricmc.fabric.api.event.lifecycle.v1.ServerTickEvents.EndTick
• net.fabricmc.fabric.api.event.player.AttackBlockCallback
• net.fabricmc.fabric.api.event.player.UseBlockCallback
• net.fabricmc.fabric.api.networking.v1.PayloadTypeRegistry
• net.fabricmc.fabric.api.networking.v1.ServerPlayConnectionEvents
• net.fabricmc.fabric.api.networking.v1.ServerPlayConnectionEvents.Disconnect
• net.fabricmc.fabric.api.networking.v1.ServerPlayNetworking
• net.fabricmc.fabric.api.networking.v1.ServerPlayNetworking.Context
• net.fabricmc.fabric.api.networking.v1.ServerPlayNetworking.PlayPayloadHandler
• net.minecraft.client.KeyboardHandler
• net.minecraft.client.OptionInstance
• net.minecraft.client.Options
• net.minecraft.client.gui.GuiGraphicsExtractor.HoveredTextEffects
• net.minecraft.client.gui.Hud
• net.minecraft.client.gui.components.AbstractSliderButton
• net.minecraft.client.gui.components.AbstractWidget
• net.minecraft.client.gui.components.Button
• net.minecraft.client.gui.components.Button.Builder
• net.minecraft.client.gui.components.Button.CreateNarration
• net.minecraft.client.gui.components.Button.OnPress
• net.minecraft.client.gui.components.EditBox
• net.minecraft.client.gui.components.Tooltip
• net.minecraft.client.gui.components.WidgetTooltipHolder
• net.minecraft.client.gui.navigation.ScreenRectangle
• net.minecraft.client.input.KeyEvent
• and 82 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

Record sub-tick events and replay them in game!

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file microtimingreplay-1.0.0-26.3.jar. The scan reads the mod's classes; it does not run them.