KB: #124 twist-sign verified [T2] -- adapter flip correct, bench + diags recorded

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

context/combat-damage.md

@@ -117,6 +117,16 @@ an embellishment and was removed same-day.  Final matrix (two-node, spinning tar
 walker): limbs 55/70 in-zone (legs/feet 6/6), hull-family aims -> dtorso 56/69, victim
 consumption matching.  **The night-10 field audit table is this model's fingerprint** — 'only
 LCT gets hits' from aimed energy IS the pod's design.  Bench: [[test-harness]] §zone-walk.
+**TWIST-SIGN VERIFIED (2026-08-04) [T2 live]:** the frame adapter's inferred angular flip
+(`SelectSlice: theta -= TorsoHeading()`, vs the binary's `+=` before the z-reflection) is
+CORRECT — bench: target torso pinned 0/+140°/−140° (`BT_FORCE_TWIST`, sim-level
+`analogTwistAxis` hold in torso.cpp — the input-level pin is DEAD, live input rides the
+CONTROLS.MAP device push and Basic mode auto-centers), LRM salvos (missiles = the authentic
+cylinder consumers; the binary DROPPED zone-−1 beam damage).  Slice picks track the
+physically-facing flank in both twist directions (positive twist = `horizontalLimitLeft` =
+CCW), deterministic; the wrong sign is cleanly excluded (would pick slice 7 where slice 1 is
+observed).  Diag: `[slice]` log (live twist, thetaIn/thetaAdj, wedge index) + zone NAMES on
+`[dmgresolve]` (both under `BT_DMGTABLE_LOG`); bench `scratchpad/night11/twistsign.sh`.
 
 **IMPLEMENTED (2026-07-29/30) [T2 bench]: the aimed PER-PART pick.**
 `BTL4VideoRenderer::MechSegmentPick` (btl4vid.cpp): at tree build, each segment's draw object +