Card CI-R1 - written 2026-09-26 18:10:10 -0700 (clock-read) BEFORE compiling. DIAGNOSTIC retail witness (rcheck.py), zero credit.
HEAD and CI-C1 in the calibrated retail config vs Sept-25-2001 (map) and Oct-12-2001 2276P.
Prediction: Sept has player_effect_update_camera_impulse; HEAD retail differs from Sept only in the same x87 orders
(p 0.5); CI-C1 retail matches Sept or at least removes those differences (p 0.4); retail may not discriminate.

OUTCOME (appended 2026-09-26 18:10:30 -0700): HEAD retail (800 B) = Sept DIFF (first difference at +0x1e2: the jitter
cross product, ours 'fld [ebx]; fmul [eax+4]' vs Sept 'fld [eax+4]'), Oct: no hit. CI-C1 retail (800 B) = Sept
MATCH (0x4691d0) AND found verbatim in Oct 2276P (0x7a190). Retail DISCRIMINATES here: only the realcmp form
reproduces both Bungie retail compiles, in a configuration whose VN environment differs from debug (inline
accessors, no DEBUG). Prediction 'retail may not discriminate' failed in the good direction. (Retail equality is
corroboration, not proof; memory: 3/20 false accepts.)
