diff --git a/.custodian-brief.md b/.custodian-brief.md
index 89e8cc7..2710f45 100644
--- a/.custodian-brief.md
+++ b/.custodian-brief.md
@@ -2,12 +2,13 @@
 # Custodian Brief — repo-scoping
 
 **Domain:** custodian  
-**Last synced:** 2026-05-15 00:07 UTC  
+**Last synced:** 2026-05-15 00:21 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)*
+### Activity-Core Scope Context API
+Progress: 4/4 done  |  workstream_id: `83a43ab6-d566-41e0-afd7-f2833812564f`
 
 ---
 ## MCP Orientation (when available)