Encounter IDs **E01–E10** are the ten accepted placements; E08 and E10 are the two setpieces inside that ten. Mechanism IDs **P01–P13** are major placed instances. P01/P03 are Triage Relays, P02/P04 Sterilization Carousels, P05/P07 Breath Banks, P08 Phase-Balance, and P06/P09 Resuscitation Grids: **five reusable families, nine placements**. P10 iris/two-clamp assembly, P11 clinical profile comparator, P12 Synchronization converter/roster and P13 core isolation are four unique objective mechanisms. Thirteen is the former SMALL 12-slot sample plus the accepted explicit isolation increment.
The number 13 is not “all interactive objects.” R02/R03's selected-opening board/rack conduit, R26's reversible A↔B Decontamination circuit, R33's fixed A→R exchanger, ordinary doors, evidence drawers and every room's join/release face remain real authored interfaces. They are cross-linked below but are not silently declared members of a reusable trap family or duplicated as P14+. A room, encounter, clue, rescue, part source and mechanism sharing one place retain separate identities but are counted once in their owning ledger.
@@ 134,7 122,7 @@
**Objective and approaches.** Pull R4, record the responsive line and test R3's matching B plate; Capacitor removal is optional. (1) Opening rig: Sensor→Projector can target exposed Shutterback but cannot shoot sheltered Pressers through its fan; Manual→Barrier holds the direct lane while one pull stage commits. (2) Later Manual→Nozzle may rotate/break heel clamps or push an eligible body onto the Grid; recoil clearance is marked. Arc has no assumed permission through the fan. (3) Baseline: take the longer visible angle, cut the alarm lead, bait Grid discharge while on ceramic strips, or cut both Grid clamps, then use cutter/ordinary fire and withdraw after a pull checkpoint.
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**Evidence and persistence.** R4 physical pull and new line are separate commits. Wrong pull order can lose the clean R3-B test but not Capacitor or general work. Pulls, scar, lines, plate location, alarm cut, Grid breaker/clamps and Capacitor location persist. Fan/veil-like occlusion, Grid charge and populations reset. Invalid plates produce no line and remain reclaimable; the interface never labels an interpretation correct.
+
**Evidence and persistence.** R4 physical pull and new line are separate commits. Wrong pull order can lose the clean R3-B test but not Capacitor or general work. Pulls, scar, lines, plate location, alarm cut, Grid breaker/clamps and Capacitor location persist. Fan/veil-like occlusion and Grid charge follow their local reset rules. A living return preserves defeated populations and spent stages; a death shift may select a new finite population under Combat Rules. Invalid plates produce no line and remain reclaimable; the interface never labels an interpretation correct.
### E10 — Receiver Vault — setpiece B
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**Mechanism/story boundary.** Pump/inward can equalise P10 directly; purge/outward visibly lowers the gauge and is reversible through neutral. P10 opens access but does not operate P13. R39 baffle evidence and R40 isolation are later world-time choices; re-seating isolation does not close the iris or walking joins. No treatment, survivor or diagnostic is required.
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**Persistence and recovery.** Cut alarm, completed clamp/equality/iris stages, inlet plate/line, trapped strip capture, baffle and isolation stages persist under their owners. Tether, fan, pressure animation and population reset. R36-side controls keep recovery reachable; if R35 is not a current approach, the whole encounter waits. Death with an unfinished clamp loses that stage, returns carried objects once, preserves completed clamps and shifts external adjacency only.
+
**Persistence and recovery.** Cut alarm, completed clamp/equality/iris stages, inlet plate/line, trapped strip capture, baffle and isolation stages persist under their owners. Tether, fan and pressure animation follow their local reset rules. A living return preserves defeated populations and spent stages; a death shift may select a new finite population under Combat Rules. R36-side controls keep recovery reachable; if R35 is not a current approach, the whole encounter waits. Death with an unfinished clamp loses that stage, returns carried objects once, preserves completed clamps and shifts external adjacency only.
