Night-12 field report (Ronin/Conn Man/Oracle, blackhawk-correlated): lock
ring lit with the reticle visibly off the mech + no-reg complaints. Root
cause: TWO port stand-ins answered where the 1995 card (which cast against
the DRAWN geometry) would miss -- the pick's any-object sphere fallback and
the caller's whole-mech AABB fallback. The regime that exposes them: a
LEVEL boresight over a SHORT mech -- the blackhawk's mesh tops out below
eye-ray height, so the ray clears every triangle but pierces the fat cull
spheres; the ring lights with the reticle above the mech's head (the
operator watched exactly this on the sweep bench). Careful aimed-down fire
rides triangles, which is why Oracle's per-panel audit passed on the same
build.
Fix: MechSegmentPick returns 1=drawn-geometry hit / 0=TRUE MISS / -1=no
render tree; the sphere may answer ONLY for a mesh the reader cannot parse
(pm==0 -- currently none exist: counters objs/invFail/noTri all clean);
the AABB survives ONLY as the pre-tree replicant grace. A readable mesh
the ray misses is a MISS -- no lock.
Verified (2-node vs bhk1 at 100u, all runs on force-relinked string-
verified exes after today's stale-link flake):
- LEVEL lock-sweep: 0 locks all run (pre-fix: lock band from 168 sphere
answers; picksrc tri=0 sphereFB=168).
- DOWN-PITCHED sweep: locks return 100%% tri-sourced (tri=158 sphereFB=0),
landing on real parts (rarm/ldleg/rdleg) with honest gaps.
- Full zone-walk matrix: tri=18874 sphereFB=0 box=0; victim took 156 hits
across 16 zones incl. both side torsos -- combat un-regressed.
New instruments (all env-gated): BT_LOCK_SWEEP=<axis> torso pan (the
operator-visible lock-envelope bench), [locksweep] transition log,
BT_LOCK_ENVELOPE synthetic unit-sweep probe, [picksrc]/[pickbox] source
telemetry with objs/invFail/noTri localization counters.
Bench: scratchpad/night12/zonewalk_bhk.sh.
NOTE for the field: locking is now strictly TIGHTER (ring = reticle truly
on the machine). If era testers feel the pods were more forgiving,
Draco's "slight lock linger" memory becomes a deliberate investigation
(sourced hysteresis), not an accidental sphere halo.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
