Mappings Overview (5.0+)

https://minescript.net/mappings/

What are obfuscated symbols and mappings?

Minecraft’s code is obfuscated: class, method, and field names are replaced with gibberish (e.g., Minecraft.getInstance() → fud.R()).
NeoForge (1.20.2+) remaps these symbols to Official Mojang names, so no extra mapping is needed.
Fabric uses intermediary mappings: consistent names (e.g., net.minecraft.class_310) across versions, mapping from obfuscated names.

How Minescript 5.0 handles mappings

In Pyjinn scripts, use official Mojang names.
NeoForge works directly.
Fabric requires mapping from official names → obfuscated → intermediary names.
Minescript automatically handles this if mappings are installed.

Installing mappings

Run \install_mappings in Minescript 5.0b4+.
1. Downloads Official Mojang mappings for your Minecraft version.
2. Downloads Fabric intermediary mappings (if using Fabric).
3. Loads mappings into memory for fast runtime access.
NeoForge does not require mappings.

Download(Before 5.0b4)

install_mappings.pyj (made by @maxuser)
- https://discord.com/channels/930220988472389713/1404182828907761744
mappings_downloader.py (made by @RazrCraft)
- https://discord.com/channels/930220988472389713/1392903003966668850

Quick Setup

install_mappings.pyj

Place install_mappings.pyj in the /minescript/ folder.
Run in Minecraft: \install_mappings

mappings_downloader.py

Place mappings_downloader.py in the /minescript/ folder.
Run in Minecraft: \mappings_downloader -> Detects your Minecraft version and downloads the mapping files.
Reload mappings: \reload_mappings -> Ready to use Java classes in Pyjinn scripts.

Troubleshooting

If you see: java.lang.ClassNotFoundException: net.minecraft.client.Minecraft
It means mappings are missing or not reloaded.
- Run \mappings_downloader and then \reload_mappings again.