diff --git a/.custodian-brief.md b/.custodian-brief.md
index 6cd512f..e9bc360 100644
--- a/.custodian-brief.md
+++ b/.custodian-brief.md
@@ -2,13 +2,18 @@
 # Custodian Brief — maturity-engine
 
 **Domain:** infotech  
-**Last synced:** 2026-08-29 10:55 UTC  
+**Last synced:** 2026-09-21 05:37 UTC  
 **State Hub:** http://127.0.0.1:8000 *(adjust if running on a remote machine)*
 
 ## Active Workstreams
 
 *(none — repo may need first-session setup)*
 
+## Inbox Hygiene
+
+**Stale unread:** 4 message(s) older than 3 day(s) — triage at session start.
+**Missing thread_id:** 4 unread message(s) lack supersession chains.
+
 ---
 ## MCP Orientation (when available)