Freecam (Fair Play)

Evidence

Ran on Kiln's test stand (2026-11-04): FabricServer did not start: java.lang.NoClassDefFoundError: net/minecraft/network/protocol/common/custom/CustomPacketPayload; FreecamFabric did not start: java.lang.NoClassDefFoundError: net/minecraft/client/player/AbstractClientPlayer.

What it needs from Kiln

• an access widener
• Mixin
• com.mojang.authlib.GameProfile
• com.mojang.blaze3d.platform.InputConstants.Key
• io.netty.handler.codec.DecoderException
• 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.ServerStopping
• net.fabricmc.fabric.api.event.lifecycle.v1.ServerTickEvents
• net.fabricmc.fabric.api.event.lifecycle.v1.ServerTickEvents.EndTick
• 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.Camera
• net.minecraft.client.CameraType
• net.minecraft.client.Options
• net.minecraft.client.gui.screens.GenericMessageScreen
• net.minecraft.client.multiplayer.ClientChunkCache
• net.minecraft.client.multiplayer.ServerData
• net.minecraft.client.player.AbstractClientPlayer
• net.minecraft.client.player.ClientInput
• net.minecraft.client.player.KeyboardInput
• net.minecraft.client.renderer.GameRenderer
• net.minecraft.network.FriendlyByteBuf
• net.minecraft.network.codec.StreamCodec
• net.minecraft.network.protocol.common.custom.CustomPacketPayload
• net.minecraft.network.protocol.common.custom.CustomPacketPayload.Type
• net.minecraft.network.protocol.common.custom.CustomPacketPayload.TypeAndCodec
• net.minecraft.server.MinecraftServer
• net.minecraft.server.network.ServerGamePacketListenerImpl
• net.minecraft.server.permissions.PermissionSet
• net.minecraft.server.permissions.Permissions
• net.minecraft.server.players.PlayerList
• net.minecraft.tags.FluidTags
• net.minecraft.util.Mth
• net.minecraft.world.entity.Entity.RemovalReason
• net.minecraft.world.entity.LivingEntity.SwingDescription
• net.minecraft.world.entity.MoveSimulationType
• net.minecraft.world.entity.Pose
• and 41 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

Fork of Freecam without "banned" features

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file legacyfreecam-fabric-2.0.0+mc26.3.jar. The scan reads the mod's classes; it does not run them.