Erik 211350b8a6 docs(render): Phase U.4c — implementation plan (stabilize portal visibility) ... Five tasks: (1) RED apparatus reproducing the doorway flap on a synthetic C0->C1->C2(exit) chain; (2) Layer 1 LoadedCell.VisibleCells + SeenOutside plumbing; (3) oracle-ported PVS grounding of set membership (the fix, gated by task 1); (4) seen_outside invariants (sealed=empty, threshold=stable); (5) live [vis] + visual gate. Task 3 is a faithful port (add_views 433382 / InitCell 432896 / ClipPortals 433572), pseudocode-first, not fabricated. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>		2026-05-31 09:53:38 +02:00
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plans	docs(render): Phase U.4c — implementation plan (stabilize portal visibility)	2026-05-31 09:53:38 +02:00
specs	docs(render): Phase U.4c — design spec (stabilize portal visibility / fix the flap)	2026-05-31 09:44:14 +02:00