diff --git a/.custodian-brief.md b/.custodian-brief.md
index 38a3327..61d2435 100644
--- a/.custodian-brief.md
+++ b/.custodian-brief.md
@@ -2,11 +2,14 @@
 # Custodian Brief — the-custodian
 
 **Domain:** railiance  
-**Last synced:** 2026-04-19 23:03 UTC  
+**Last synced:** 2026-04-19 23:05 UTC  
 **State Hub:** http://127.0.0.1:8000 *(adjust if running on a remote machine)*
 
 ## Active Workstreams
 
+### Cross-Repo E2E Sandbox Framework
+Progress: 8/8 done  |  workstream_id: `b68de20b-e397-4f97-b1be-ad30711fc2a6`
+
 ### Haskell Build Machine — VirtualBox Image & State-Hub Integration
 Progress: 0/15 done  |  workstream_id: `f2bfac74-de8a-4c86-9aa9-4d95a92336e2`