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capture(research): A6.P1 scen3 — inn 2nd floor paired traces

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User reached the 2nd floor in acdream via ACE @teleport (stair-physics
unblocked separately by scen2). Retail walked normally to 2nd floor.
Both clients performed the same walk: forward 3 m, sidestep 1 m,
walk back. Flat-floor scenario, no stairs, no transitions.

Retail (decoded, 21,337 lines):
  BP1 transitional_insert: 10,217 hits
  BP4 find_collisions:     10,636 hits
  BP5 adjust_sphere:          113 hits
  BP6 check_walkable:         113 hits  threshold=0.6642
  BP2 step_up:                  0 hits  (no stairs)
  BP3 set_collide:              0 hits  (no walls)
  BP7 set_contact_plane:        0 hits  (KEY: zero CP updates)

Acdream (93,558 lines):
  [cp-write]:        86,748  (vs retail BP7 = 0 — INFINITE ratio)
  [push-back-disp]:   2,752
  [push-back]:          320
  [push-back-cell]:     550
  [other-cells]:        550
  [indoor-bsp]:       1,061
  [indoor-walkable]:    707

KEY FINDING for A6.P2: scen3 is the strongest CP-write blowup
evidence yet. On a flat 2nd-floor walk where retail's
set_contact_plane fires ZERO times across the entire scenario,
acdream rewrites the contact plane 86,748 times. This is the
exact pattern Finding 2 hypothesized (M1.5 design spec §1.2):
acdream resynthesizes CP every frame instead of retaining it
through the documented retention mechanisms (LKCP-restore,
Path-6 land write, post-OK step-down probe).

scen3 pair confirms CP-write blowup isn't stair-specific — it
fires equally for ordinary flat-floor walking inside any indoor
cell. A6.P3 fix surface: same as Finding 2 — stop resynthesizing
CP per frame.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
Erik 2026-05-21 20:39:46 +02:00
parent 297d1c54e8
commit 4b5aebc61f
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