diff --git a/.custodian-brief.md b/.custodian-brief.md
index 30922cf..0832150 100644
--- a/.custodian-brief.md
+++ b/.custodian-brief.md
@@ -2,11 +2,14 @@
 # Custodian Brief — user-engine
 
 **Domain:** communication  
-**Last synced:** 2026-10-09 13:52 UTC  
+**Last synced:** 2026-10-09 13:53 UTC  
 **State Hub:** http://127.0.0.1:8000 *(adjust if running on a remote machine)*
 
 ## Active Workstreams
 
+### Scoped invitation mail client bindings
+Progress: 1/1 done  |  workplan_id: `88817a88-4415-5400-be9a-939406e77831`
+
 ### User account journeys and recovery
 Progress: 1/3 done  |  workplan_id: `145df9d5-a7e9-5d20-8280-9d3ea069838b`