diff --git a/.custodian-brief.md b/.custodian-brief.md
index 1688719..c362cf1 100644
--- a/.custodian-brief.md
+++ b/.custodian-brief.md
@@ -2,11 +2,17 @@
 # Custodian Brief — net-kingdom
 
 **Domain:** infotech  
-**Last synced:** 2026-08-14 17:59 UTC  
+**Last synced:** 2026-08-18 05:28 UTC  
 **State Hub:** http://127.0.0.1:8000 *(adjust if running on a remote machine)*
 
 ## Active Workstreams
 
+### Promote user-engine workload identity to flex-auth
+Progress: 1/2 done  |  workplan_id: `3a9b7b04-d283-4101-8b6a-31624c6d5de6`
+
+**Open tasks:**
+- ! NK-WP-0026 — user-engine caller identity rollout  `9dbaf763`
+
 ### Cut over NetKingdom identity to railiance01 and retire CoulombCore
 Progress: 7/8 done  |  workplan_id: `3dadddeb-4cec-48e2-9c2c-788b26dd6e93`
 
@@ -14,6 +20,10 @@ Progress: 7/8 done  |  workplan_id: `3dadddeb-4cec-48e2-9c2c-788b26dd6e93`
 - ! T08 - Final deletion and closure  `9f209f15`
   *(wait: Rollback retention gate remains in force through 2026-08-29; then verify restore/restart drill evidence and obtain separate explicit approval before deletion or closure.)*
 
+## Inbox Hygiene
+
+**Missing thread_id:** 3 unread message(s) lack supersession chains.
+
 ---
 ## MCP Orientation (when available)