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capture(research): A6.P1 scen2 — replace acdream pair with stair-attempt

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Original acdream capture (a9a427f) was a doorway-walk because acdream's
indoor stair physics doesn't work. For A6.P2 to characterize the
divergence we need the FAILURE captured, not a substitute walk.

User re-attempted the inn stairs in acdream (whatever it produces:
bumping, sliding, stuck). Failure signature is dramatic vs door-walk:

  Tag             | door-walk | stair-attempt | ratio
  ----------------+-----------+---------------+------
  push-back-disp  | 1,141     | 4,156         | 3.6x
  push-back-cell  | 87        | 1,478         | 17x
  other-cells     | 87        | 1,478         | 17x
  indoor-bsp      | 343       | 1,286         | 3.7x
  indoor-walkable | 227       | 859           | 3.8x
  cp-write        | 70,244    | 33,969        | 0.5x (!)

The 17x explosion on push-back-cell / other-cells says acdream's
CheckOtherCells loop fires constantly when physics can't resolve a
stair-step — the indoor BSP query fails, then the multi-cell
fallback fails, then the next tick repeats. The cp-write DROP
(half the door-walk volume) is the inverse signal: when no ground
plane resolves, no CP gets written. Both are A6.P2 fix-surface
indicators.

Now scen2 pair = retail successfully climbs (BP2 step_up=188) vs
acdream tries and fails (push-back-cell explosion).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
Erik 2026-05-21 20:26:20 +02:00
parent a9a427fff9
commit 297d1c54e8
1 changed files with 31173 additions and 60936 deletions
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