Adds the [indoor-bsp] probe + ProbeIndoorBspEnabled toggle for the
Indoor walking Phase 1 BSP-cluster investigation. Mirrors the existing
[resolve] / [cell-transit] / [indoor-*] pattern: one log line per
BSPQuery.FindCollisions call from FindEnvCollisions' cell branch,
capturing cell id, sphere local-pos, result TransitionState, and the
hit poly's normal + side-type via the LastBspHitPoly side-channel
(already wired for ProbeBuildingEnabled, now also fires for the indoor
flag).
Toggle via ACDREAM_PROBE_INDOOR_BSP=1 env var or DebugPanel checkbox.
Zero-cost when off.
Predecessor for the three fix commits that will close ISSUES.md
#84/#85/#86 after the capture session.
Spec: docs/superpowers/specs/2026-05-19-indoor-walking-phase1-bsp-cluster-design.md
Plan: docs/superpowers/plans/2026-05-19-indoor-walking-phase1-bsp-cluster.md
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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