diff --git a/.custodian-brief.md b/.custodian-brief.md
index 9267b05..6485bdf 100644
--- a/.custodian-brief.md
+++ b/.custodian-brief.md
@@ -2,7 +2,7 @@
 # Custodian Brief — rein-aharness
 
 **Domain:** agents  
-**Last synced:** 2026-09-04 17:53 UTC  
+**Last synced:** 2026-09-09 12:08 UTC  
 **State Hub:** http://127.0.0.1:8000 *(adjust if running on a remote machine)*
 
 ## Active Workstreams
@@ -15,6 +15,11 @@ Progress: 3/6 done  |  workplan_id: `eba2eff1-10a7-50a3-a70b-14e7d398f27f`
 - ! Re-prove one governed profiled run and close residuals  `68a13c4f`
 - ► Align deployment, recovery, and conformance with the supported runtime  `c4a3f08f`
 
+## Inbox Hygiene
+
+**Stale unread:** 1 message(s) older than 3 day(s) — triage at session start.
+**Missing thread_id:** 1 unread message(s) lack supersession chains.
+
 ---
 ## MCP Orientation (when available)