diff --git a/.custodian-brief.md b/.custodian-brief.md
index 825d751..0ef7850 100644
--- a/.custodian-brief.md
+++ b/.custodian-brief.md
@@ -2,7 +2,7 @@
 # Custodian Brief — artifact-store
 
 **Domain:** stack  
-**Last synced:** 2026-05-16 22:24 UTC  
+**Last synced:** 2026-05-16 22:26 UTC  
 **State Hub:** http://127.0.0.1:8000 *(adjust if running on a remote machine)*
 
 ## Active Workstreams
@@ -14,9 +14,6 @@ Progress: 4/5 done  |  workstream_id: `701c4d8c-5cf4-4a4a-ab60-1dcae53fe771`
 - ! D5.5 - Operator Smoke Procedure For The Real Producer  `bffa3573`
   *(blocked: Fresh guide-board/OpenCMIS producer run stops before artifact-store handoff with missing reports/cmis-summary.md.)*
 
-### Garbage Collection And Reference Counting
-Progress: 4/4 done  |  workstream_id: `ccef72e9-a160-45c0-9952-c64be7c8cfa4`
-
 ### S3-Compatible Backend (Ceph RGW Target)
 Progress: 4/5 done  |  workstream_id: `d0526cfc-e532-431f-970d-f3e548d27a80`