diff --git a/inventory/topology.yaml b/inventory/topology.yaml
index f7e1abe..372554d 100644
--- a/inventory/topology.yaml
+++ b/inventory/topology.yaml
@@ -74,6 +74,10 @@ nodes:
   lustro:
     # MagicMirror Raspberry Pi — full monitored node: runs node-agent and
     # ships events to the control plane (recon F20.11).
+    # Duty cycle (checked 2026-07-30 in the vps event store): node_offline
+    # fires once a day, ~24 h apart, around 23:30 local — a scheduled nightly
+    # display power-off like solaria's. Daily stale/offline/online liveness
+    # cycles are expected here, not faults.
     status: active
     roles:
       - edge