Next-session brief: build retail's collision-inclusion model (PhysicsState/
ETHEREAL/HAS_PHYSICS_BSP predicate + per-cell shadow-list registration + the
building-shell/terrain/EnvCell channels), map acdream's per-channel ad-hoc
filters against it, enumerate deviations, and design ONE unified retail-faithful
mechanism to replace them. Motivated by this session's #146/#147 — both were the
same shape (a per-channel filter diverging from retail). Brainstorm-gated,
report-first, no guess-patches. Includes the apparatus inventory + a paste-ready
prompt.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
