diff --git a/.custodian-brief.md b/.custodian-brief.md
index 6133343..7d51ac5 100644
--- a/.custodian-brief.md
+++ b/.custodian-brief.md
@@ -2,18 +2,12 @@
 # Custodian Brief — guide-board
 
 **Domain:** markitect  
-**Last synced:** 2026-05-15 13:14 UTC  
+**Last synced:** 2026-05-15 13:30 UTC  
 **State Hub:** http://127.0.0.1:8000 *(adjust if running on a remote machine)*
 
 ## Active Workstreams
 
-### Extension SDK Maturity
-Progress: 1/4 done  |  workstream_id: `26aa9511-cd5c-4dd5-989c-d2838ba3b50d`
-
-**Open tasks:**
-- · D3.2 - Normalizer Plug-in Contract  `b87e68c1`
-- · D3.3 - SDK Fixture Extension And Acceptance Tests  `f3738751`
-- · D3.4 - Extension Authoring Documentation Refresh  `3d390bd4`
+*(none — repo may need first-session setup)*
 
 ---
 ## MCP Orientation (when available)