diff --git a/.custodian-brief.md b/.custodian-brief.md
index 96f54b1..b4286e7 100644
--- a/.custodian-brief.md
+++ b/.custodian-brief.md
@@ -2,12 +2,20 @@
 # Custodian Brief — zone-engine
 
 **Domain:** infotech  
-**Last synced:** 2026-08-23 10:32 UTC  
+**Last synced:** 2026-08-29 09:59 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)*
+### Declare Engine/PIP and freeze the offline zone-membership surface
+Progress: 0/5 done  |  workplan_id: `95573eaf-0b3f-5d48-af55-231f46d7295e`
+
+**Open tasks:**
+- · T01 - Machine-readable layer declaration and conformance check  `ca687f30`
+- · T02 - Close ZONE-IN-0001 and notify gate-house  `c0f726a6`
+- · T03 - Record the §10 artifacts for the 2026-08-23 layer cut  `828a4c67`
+- · T04 - Align remaining consumer-facing naming  `bd4955b6`
+- · T05 - PIP claim-boundary note, without a schema  `ee883d61`
 
 ---
 ## MCP Orientation (when available)