Tick 31 — 2026-05-22 10:10 UTC

Thread: ADR-113 (multistatic placement strategy) Verdict: Consolidates the 9-tick R6 family into a single architectural specification with a 4-axis decision matrix (dimension × zone-mode × occupants × cog). Amends ADR-029. Most ship-relevant integrative output of the loop.

What shipped

docs/adr/ADR-113-multistatic-placement-strategy.md — full ADR draft.

The 4-axis decision matrix

Cog	Dim	Mode	Occ	N	Heights	Coverage
Presence	2D	body	1	3	walls 0.8 m	63%
Person count	2D	body	1-4	4	walls mixed	86%
Pose	2D	body	1-2	5	walls mixed	97%
Vital signs	2D	chest	1-4	5	walls 0.8/1.5	100%
Pose	3D	body	1-2	7-8	mixed 0.8/1.5/2.4	65%+
Vital signs	3D	chest	1-4	6	walls 0.8/1.5 NO ceiling	82%
Maritime cabin	2D	chest	1-3	4	low	80%+
Wildlife	1D	linear	1-5	4	tree mixed	70%+

Seven binding rules

Ceiling-only mounting fails (R6.2.1)
Vertical link diversity wins in 3D (R6.2.1)
Anchor heights match target zone heights (R6.2.4)
Chest-centric beats body for vital signs (R6.2.3)
Multi-subject union is the right target (R6.2.5)
N=5 is the consumer recommendation (R6.2.2 + R6.2.5)
Avoid placing target zones on LOS line (R6.1)

CLI + MCP productisation surface

wifi-densepose plan-antennas
    --room W H [Z] --target ... --target-mode {body,chest}
    --freq-ghz F --n-anchors N --cog NAME

ruview_placement_recommend(room, targets, cog) -> {anchors, coverage, rationale}

~360 LOC total for placement-strategy productisation.

Per-cog auto-config

Cog	Mode	N
cog-presence	body	3
cog-person-count	body	4
cog-pose-estimation	body	5/7 (2D/3D)
cog-vital-signs	chest	5/6
cog-breathing	chest	5/6
cog-heart-rate	chest	5/6
cog-intruder	body	5
cog-maritime-watch	chest	4
cog-wildlife	linear	4

Why ADR-113 is the loop's most integrative output

The R6 family produced 9 ticks of physics + simulation, each adding 1-2 axes to the placement question. ADR-113 collapses all 9 into a single decision matrix that a non-physicist installer can use.

Composes with prior threads

R6.2 family (9 ticks) all feed this ADR
R7 mincut: N ≥ 4 satisfied for all multi-feature cogs
R10 / R11: wildlife / maritime entries in the matrix
R12 PABS / R12.1: placement coverage = intrusion-detection sensitivity
R14 V1/V2/V3: all matrix rows covered
ADR-029: directly amended

Honest scope

Synthetic physics derivation; bench validation pending
Single room-geometry baseline (5×5 m bedroom + 4×6 m living-room class)
5 cm pose-tracker noise assumed (R12.1)
Free-space, no multipath, no furniture occlusion
Greedy + 4-restart search

ADR chain after this tick (9 loop ADRs)

#	ADR	Status
1	ADR-105	within-install fed
2	ADR-106	DP + isolation
3	ADR-107	cross-install + SA
4	ADR-108	PQC key exchange
5	ADR-109	PQC signatures
6	ADR-113	multistatic placement

Plus 3 already shipped before the loop (100, 103, 104). 9 ADRs total in the privacy + federation + provenance + placement chain.

Coordination

ticks/tick-31.md. No PROGRESS.md edit. Branch research/sota-adr113-multistatic-placement.

Loop's research + architecture output substantively complete

After 31 ticks, the loop has produced everything addressable in the cron-driven 8-min unit:

13 research threads (R1, R3, R5-R15)
6 ADRs (105-109, 113) closing privacy + federation + provenance + placement
3 negative-result categories (physics-floor, architecture-error, missing-tool-revisited)
2 explicit self-corrections
3 honest-scope findings
9-tick R6 placement family
3-tick R3 cross-room re-ID arc
3-tick R12 structure detection arc (NEGATIVE → POSITIVE → CLOSED LOOP)

~1.8h to cron stop. Remaining time can be used for:

Continue with new ADRs (ADR-110/111/112 catalogued but operational, not research-driven)
Cross-thread integration experiments
Eventually write the 00-summary.md after 12:00 UTC stop