Minecraft Coder Pack (MCP)

Minecraft Coder Pack (MCP) is a core toolkit: It decompiles and deobfuscates the closed-source Minecraft client/server JARs, providing human-readable code for mod development.

MCP is the foundational toolset for classic Minecraft modding (versions 1.7.10 through 1.12.2, and its modern fork, MCP-Reborn, supports 1.13+). It solves a critical problem: Minecraft’s original Java code is obfuscated (unreadable). MCP uses a collection of scripts, tools, and community-contributed mappings (Notch, Searge, and MCP) to reverse-engineer the code, converting cryptic variable and method names into clear, functional labels like `spawnEntityInWorld`. This process generates a clean, decompiled workspace, enabling developers to build, test, and re-obfuscate their mods for runtime compatibility with the official game launcher.

https://github.com/Hexeption/MCP-Reborn