STS2RobotSkinMod — crash fix (Defect robot skin)

Fixes the Steam Workshop mod STS2RobotSkinMod (item 3747601919) for Slay the Spire 2, which crashes on load and breaks the Defect in combat.

Quick install: download the installer above → fully close Slay the Spire 2 → run it. It's unsigned, so SmartScreen will warn — click More info → Run anyway.

The problem

On launch the mod logs:

[Error] [STS2RobotSkinMod] Initialize failed: An item with the same key has already been added.
Key: res://STS2RobotSkinModCode/Node/Dummy/NCreatureVisualsDummy.cs
  at Godot.Bridge.ScriptManagerBridge.PathScriptTypeBiMap.Add(...)
  at STS2RobotSkinMod.STS2RobotSkinModMain.Initialize()

…and if you reach combat as Defect:

[Error] [STS2RobotSkinMod] CreateVisuals patch exception:
Unable to cast object of type 'Godot.Node2D' to type 'NCreatureVisuals'.

Cause: the mod's DLL calls ScriptManagerBridge.LookupScriptsInAssembly on its own assembly three times. That call is what registers the mod's scripts so its scenes can instantiate — but calling it more than once throws a duplicate-key exception and aborts init.

Fix: a DLL where that call happens exactly once (the two redundant calls are NOP'd out, in place — same size, no other change), plus the matching PCK. Confirmed working: the skin loads and a full Defect run plays cleanly.

Install (easy)

1. Subscribe to STS2RobotSkinMod on the Workshop and launch the game once (so Steam downloads it).
2. Fully close Slay the Spire 2.
3. Double-click Apply-Fix.bat.

It finds the mod in any of your Steam libraries, backs up the originals, and installs the fix.

Install (manual)

Copy STS2RobotSkinMod.dll and STS2RobotSkinMod.pck from this folder over the ones in:

<your Steam library>\steamapps\workshop\content\2868840\3747601919\

(Back up the originals first if you like.)

Revert

Restore the .dll.bak / .pck.bak files the installer created (delete the .bak suffix), or just unsubscribe + resubscribe to let Steam redownload the originals.

Heads-up

A Workshop update to the mod, or Steam's "Verify integrity of game files," will overwrite these files with the broken originals again. If the crash comes back, just run Apply-Fix.bat again.

Permanent fix

This is a workaround. The real fix is for the mod author to remove the redundant LookupScriptsInAssembly calls and recompile. Report:

STS2RobotSkinModMain.Initialize() (and two other methods) each call ScriptManagerBridge.LookupScriptsInAssembly on the mod's own assembly. That call must run exactly once to register the scripts; running it more than once throws a duplicate-key exception (PathScriptTypeBiMap.Add) and aborts init. Remove the redundant calls so it runs once.

Files

• STS2RobotSkinMod.dll — patched (one registration call instead of three)
• STS2RobotSkinMod.pck — matching pack
• Apply-RobotSkinFix.ps1 — installer (auto-locates Workshop folder, backs up, installs, verifies)
• Apply-Fix.bat — double-click wrapper for the installer