Copied the 89 uncopied AI*SimulationUtility/extension files defining the AIVirtualCard/AIVirtualField extension methods; the compile loop then auto-closed the revealed type deps (~3049 files total, drift-clean). 10.0k -> 62 errors.
Compile-driven bulk-copy loop (tools/engine-port/m1_copy_loop.py) pulled the precise reference closure of the battle-core roots, stopping at the classify god-object/View-VFX-UI boundary. 782 files; no re-explosion (M0 had estimated ~order 1000). Residual frontier = 52 shim-classified + 80 external (Unity/BCL) types to author next.