So, uhhh, I've looked and anything with TMXL is obsolete at the moment, even the solution that smapi gives to "update to 1.24.3-alpha.20240226" does not work either and from what I have seen there is no unofficial ver, official response or update (I hope someone proves me wrong)
Hey bro, I know how you can adapt the TMXL for 1.6.15. In the TMXL Map Toolkit-1820-1-24-3-alpha-20240226-1708954652There is There is MoonSharp.interpreter.dll,NCalc.dll,sr.lua,TMXLoader.dll.
What you have to do is this:

Files you have and what they mean

TMXLoader.dll


THIS is the heart of the mod Contains: .tmx map loading logic Location registration Deformations Buildables SMAPI hooks This is the DLL you need to decompile and adapt to Stardew 1.6

ALL the work is here.

MoonSharp.Interpreter.dll

(dependency) External library for Lua scripts TMXL uses it for advanced logic NOT for modifications Just: make sure it's compatible with .NET 6 if it fails, it can be updated to a modern version

Treat it as a dependency, not your own code.

NCals.dll

(dependency) Mathematical/parsing library Used for internal calculations Do NOT touch it Only referenced in the project

sr.lua 🟡 Auxiliary Lua script Sometimes defines: rules expressions helpers Not the main problem Leave it untouched for now,Quick Summary File Should I touch it? Reason TMXLoader.dll

YES Main mod MoonSharp.Interpreter.dll

NO Dependency NCals.dll

NO Dependency sr.lua

Later Auxiliary script.

What to do EXACTLY now

Step 1: Decompile TMXLoader.dll Using dnSpyEx or ILSpy: Export the project to C# Save all the generated code

Step 2: Identify these classes (VERY IMPORTANT) Once you have the code, look for classes with names similar to: TMXLoaderMod / ModEntry MapLoader LocationManager TMXLocation BuildableManager WarpManager

The class that inherits from Mod is the first one to fix.

Step 3: First objective (DO NOT try to make it work yet)

Just get it to compile with SMAPI 4.3.2 That means: Updating references Fixing using statements Changing obsolete events Even if the mod doesn't load maps yet, compiling = victory.

Common mistake (avoid it)

Do not try to fix everything at once

Do not start with buildables

Do not touch MoonSharp at the beginning TMXL is fixed in layers, not all at once.
Tell me ONE of these things:

The names of the classes that appear after decompiling

The first compilation error you get

The content of the class that inherits from Mod