diff --git a/REGISTER.md b/REGISTER.md
index b01e5fa..9d69772 100644
--- a/REGISTER.md
+++ b/REGISTER.md
@@ -2,7 +2,7 @@
 
 Generated by `tools/register_index.py` from `findings/`. Do not edit by hand. Last built 2026-08-20.
 
-6 open of 9 findings; 2 notes below the floor.
+6 open of 9 findings; 3 notes below the floor.
 
 ## Findings
 
@@ -45,6 +45,7 @@ Seen, deliberately not findings. Not graded, not reviewed, not published.
 
 | ID | Note | Why below the floor |
 | --- | --- | --- |
+| [RISK-N-0004](notes/RISK-N-0004-zone-lookup-facility.md) | No facility answers which zone a workload is in, or what applies there | missing capability, not a defect — there is nothing to route to a fix owner, and the register does not file undone work |
 | [RISK-N-0003](notes/RISK-N-0003-defects-found-by-reading-not-monitoring.md) | Every defect in this register was found by reading, none by monitoring | no owner and no defect — it is an argument about where to invest detection, and the register cannot route an argument |
 | [RISK-N-0001](notes/RISK-N-0001-noisy-neighbour-uncharacterised.md) | Noisy-neighbour behaviour is uncharacterised | no decision changes today — no tenant shares a saturating workload, and what is missing is measurement work, not a defect to route |