EffectLib's 18 units are copied verbatim (Type.h: drop a comment backslash that clang splices into the next enum line). The remaining Utils stubs get the 40250 bodies, so .msf fly data resolve relative .mse attachments, and CPythonResource registers mde/mdatr as 40250 does. login_flow spawns level_up.mse and sees its particle draws. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>