ACHARNESS verification kernel build (guest, 2026-10-23/24):
  cd /usr/src && make -j5 nativekernel KERNCONF=ACHARNESS &&
  make installkernel KERNCONF=ACHARNESS
baseline #3 (Fri Oct 23 21:01:49 UTC 2026), fixed #7 (Sat Oct 24 00:08:04)
Rig = verbatim production sources + acsim/aibsim/agpshim interposition
compiled into the kernel (runtime kldload GPFs on this guest).
Full rig sources: acsim.c / aib_shim.c / agp_shim.c / ssdt_*.dsl in each pack.
STOCK-kernel findings (DF-2373, DF-2392): no build required.