DecompilerMC VS Enigma

Honestly the way I learned is just downloading the code (https://github.com/hube12/DecompilerMC or https://github.com/QuiltMC/quilt-mappings are probably the best ways right now) and poking around until I found what I was looking for.

I have no clue how item shadowing in 1.18 is possible but if you want to have a look at the source code you could try MCP Reborn which even allows you to modify the code and run it easily, though not all variables are deobfuscated. You can also use the official obfuscation mappings to manually decompile Minecraft (wiki article or use DecompilerMC to automate that task (with this method afaik nothing is obfuscated but there is no function to run the code. It would probably be quite easy to port the gradle tasks from MCP reborn or create your own but I’m not a Java dev so I’m not sure)

this tool for code with mojang mappings(no parameter names): https://github.com/hube12/DecompilerMC

You can use DecompilerMC to decompile the latest versions and MCP to decompile older versions. Minecraft's code is definitely a giant mess of spaghetti, although maybe not as bad as it used to be.

If you do wanna look at mc code though, you can use DecompilerMC, or just download the fabric example mod and run the genSources gradle task

If you do wanna deobfuscate and decompile it tho, look into yarn or DecompilerMC

2) Use this, it uses mojang mappings https://github.com/hube12/DecompilerMC 3) Use mcp-reborn (mcpconfig) which use modcoderpack mappings https://github.com/Hexeption/MCP-Reborn

Agreed. I've also found that reading the decompiled source can be very helpful in many cases. Not sure what's the best way to get it nowdays, but I've used Enigma (to deobfuscate using the official mappings) and Recaf in the past.

I thought about maybe I can find it myself by checking the 1.18's source code. I tried to get this source code, but enigma(https://github.com/FabricMC/Enigma) is not supporting 1.18 (I'm not able to use enigma to get the source code on my computer). So I have no idea how Mojang patched Item Shadowing in 1.17, and how to overcome this problem.