Five links traced from the named decomp: the below-push never executes
(OnWalkable guard — the probe printed the wrong guard pair), the
from-scratch retry is retail-identical, and validate_transition's
failure path manufactures every captured field including the (0,0,1)
default. Stopping dead may simply BE retail. Two validations remain:
the user observing their RETAIL client at a comparable slope (the
cheapest decisive test there is), and — only if retail visibly
slides — the find_cell_list broadphase question via the cdb toolchain.
The mechanism paragraph's wrong-cause framing is retained and
corrected in place, per the register's own honesty pattern.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>