diff --git a/.custodian-brief.md b/.custodian-brief.md
index b437208..3666b53 100644
--- a/.custodian-brief.md
+++ b/.custodian-brief.md
@@ -2,12 +2,24 @@
 # Custodian Brief — zone-engine
 
 **Domain:** infotech  
-**Last synced:** 2026-08-19 19:19 UTC  
+**Last synced:** 2026-08-22 10:55 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)*
+### The security zone model — derive it from the estate, draft it as canon
+Progress: 2/7 done  |  workplan_id: `a75c8c9c-c108-4831-8d72-4343cce49879`
+
+**Open tasks:**
+- · Tasks  `7f47b750`
+- · Tasks  `1c542ca5`
+- · Tasks  `f4556ca0`
+- · Tasks  `8a000c18`
+- · Tasks  `c7ea24df`
+
+## Inbox Hygiene
+
+**Missing thread_id:** 2 unread message(s) lack supersession chains.
 
 ---
 ## MCP Orientation (when available)