Jump Delay Fix

Evidence

Ran on Kiln's test stand (2026-11-04): JumpDelayFixFabric did not start: java.lang.NoSuchFieldError: Class net.minecraft.client.Minecraft does not have member field 'java.io.File gameDirectory'.

What it needs from Kiln

• net.fabricmc.fabric.api.client.event.lifecycle.v1.ClientLifecycleEvents
• net.fabricmc.fabric.api.client.event.lifecycle.v1.ClientLifecycleEvents.ClientStopping
• 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.minecraft.client.Options
• net.minecraft.client.gui.components.Button
• net.minecraft.client.gui.components.Button.Builder
• net.minecraft.client.gui.components.Button.OnPress
• net.minecraft.client.multiplayer.PlayerInfo
• net.minecraft.client.multiplayer.ServerData
• net.minecraft.world.entity.player.Abilities
• org.lwjgl.sdl.SDLKeycode
• KeyMapping.isDown()
• Minecraft.gameDirectory
• Minecraft.getCurrentServer()
• Minecraft.hasSingleplayerServer()
• Minecraft.options
• Minecraft.setScreenAndShow()
• GuiGraphicsExtractor.centeredText()
• Screen.extractRenderState()
• ClientPacketListener.getPlayerInfo()
• LocalPlayer.getAbilities()
• LocalPlayer.getId()
• LocalPlayer.isAlive()
• LocalPlayer.isFallFlying()
• LocalPlayer.isInWater()
• LocalPlayer.isPassenger()
• LocalPlayer.isSleeping()
• LocalPlayer.isSwimming()
• LocalPlayer.isVisuallyCrawling()
• LocalPlayer.jumpFromGround()
• LocalPlayer.onGround()

On the roadmap: Minecraft's libraries and client API (0.2), Code next to data (0.3)

In the author's words

Eliminates vanilla jump delay for instant, ultra-responsive movement. Lightweight client-side mod for Fabric & NeoForge with smart server auto-tuning, perfect for PvP & parkour.

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file jumpdelayfix-fabric-26.3-1.4.2.jar. The scan reads the mod's classes; it does not run them.