Atlas Client

Evidence

Ran on Kiln's test stand (2026-11-04): Client did not start: java.lang.NoClassDefFoundError: net/minecraft/client/player/AbstractClientPlayer.

What it needs from Kiln

• an access widener
• Mixin
• com.mojang.authlib.Environment
• com.mojang.authlib.GameProfile
• com.mojang.authlib.minecraft.UserApiService
• com.mojang.authlib.minecraft.UserApiService.UserProperties
• com.mojang.authlib.services.MinecraftServicesDiscoveryService
• com.mojang.blaze3d.pipeline.RenderTarget
• com.mojang.blaze3d.platform.InputConstants.Key
• com.mojang.blaze3d.platform.NativeImage
• com.mojang.blaze3d.platform.TextInputManager
• com.mojang.blaze3d.platform.Window
• com.mojang.blaze3d.systems.RenderSystem
• com.mojang.blaze3d.vertex.DefaultVertexFormat
• com.mojang.blaze3d.vertex.PoseStack
• com.mojang.blaze3d.vertex.PoseStack.Pose
• com.mojang.blaze3d.vertex.VertexConsumer
• com.mojang.renderpearl.api.pipeline.PrimitiveTopology
• com.mojang.renderpearl.api.textures.GpuTexture
• com.mojang.renderpearl.api.vertex.VertexFormat
• com.mojang.renderpearl.backend.opengl.FrameBufferAttachment
• com.mojang.renderpearl.backend.opengl.FrameBufferCache
• com.mojang.renderpearl.backend.opengl.GlStateManager
• com.mojang.renderpearl.backend.opengl.GlTexture
• io.netty.buffer.ByteBuf
• io.netty.buffer.Unpooled
• net.fabricmc.fabric.api.client.command.v2.ClientCommandRegistrationCallback
• net.fabricmc.fabric.api.client.command.v2.ClientCommands
• net.fabricmc.fabric.api.client.command.v2.FabricClientCommandSource
• net.fabricmc.fabric.api.client.event.lifecycle.v1.ClientLifecycleEvents
• net.fabricmc.fabric.api.client.event.lifecycle.v1.ClientLifecycleEvents.ClientStarted
• net.fabricmc.fabric.api.client.event.lifecycle.v1.ClientLifecycleEvents.ClientStopping
• net.fabricmc.fabric.api.client.event.lifecycle.v1.ClientTickEvents.EndLevelTick
• net.fabricmc.fabric.api.client.message.v1.ClientReceiveMessageEvents
• net.fabricmc.fabric.api.client.message.v1.ClientReceiveMessageEvents.Chat
• 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.client.rendering.v1.level.LevelRenderContext
• 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

Make Minecraft your own with 88 modules, movable HUDs, skins, capes, emotes and community chat, all accessible while you play.

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file atlas-client-3.0.3-mc26.3.jar. The scan reads the mod's classes; it does not run them.