Restoring config/ from git does NOT rewind asm/, so a reverted overlay was left
with stale extraction — and `git status` is structurally blind to it (the R22
corollary, here inside a tool's own undo path). Within a sweep each sibling is a
DIFFERENT overlay, so the next sibling's own extract never repairs the previous
one: the damage persists to whatever runs next.
Byte-witnessed on the 0x8013C414 probe: after 3 gate-fails `git status` was EMPTY
and ov_SC01_004 failed to link (`undefined reference to jtbl_8018DAC8`).
- revert() now RE-EXTRACTS (extract=True default); the clean-slate call at the top
of bank_one passes extract=False since it extracts immediately afterwards anyway
- revert() only `git checkout`s a TRACKED path: an isolation creates region .c
files that were never added, and checkout on those emitted `error: pathspec ...
did not match any file(s) known to git` while doing nothing. The keep_regions
cleanup removes them instead.
NEGATIVE CONTROL: the same probe now gate-fails 3/3 as before, and all three
overlays build BYTE-IDENTICAL afterwards with a clean git status.
Drew T
372bff1153