Proton's prefix-setup phase overwrites system32/cmd.exe on every game
launch, breaking the previous approach of placing a shim there. Switch to
Windows Image File Execution Options (IFEO): the shim is compiled to
drive_c/shim/kyber_cmd.exe (Proton never touches that directory) and the
IFEO Debugger key is written to system.reg so Wine intercepts cmd.exe at
CreateProcess time without touching the filesystem binary.
Also fix the wine64 path used for winetricks: correct path is
files/lib/wine/x86_64-unix/wine64 not files/bin/wine64.
The shim is simplified to scan all args for any http URL (IFEO passes the
debuggee path as an extra arg, so the /c start pattern match was fragile).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01D8ckUJQtj1pH8jtAddBDZs
Claude
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