diff --git a/.custodian-brief.md b/.custodian-brief.md
index 553e371..1ac99a5 100644
--- a/.custodian-brief.md
+++ b/.custodian-brief.md
@@ -2,18 +2,11 @@
 # Custodian Brief — shard-wiki
 
 **Domain:** whynot  
-**Last synced:** 2026-06-15 20:45 UTC  
+**Last synced:** 2026-06-15 21:05 UTC  
 **State Hub:** http://127.0.0.1:8000 *(adjust if running on a remote machine)*
 
 ## Active Workstreams
 
-### wiki-engine prep — reuse-surface registration, UC-catalog systematization, WikiEngineCoreArchitecture
-Progress: 4/6 done  |  workstream_id: `04a25a53-2169-41d4-88c0-5035a06e72ef`
-
-**Open tasks:**
-- · Author spec/WikiEngineCoreArchitecture.md  `4712bbfe`
-- · Wire-up & close-out  `1c383414`
-
 ### second adapter — git-IS-store shard (contract validation on a new substrate)
 Progress: 0/3 done  |  workstream_id: `9e24eeb0-c0f0-41e6-a1ca-88d71e4139ea`