diff --git a/.custodian-brief.md b/.custodian-brief.md
index 6b17463..5a12a7d 100644
--- a/.custodian-brief.md
+++ b/.custodian-brief.md
@@ -2,12 +2,21 @@
 # Custodian Brief — identity-canon
 
 **Domain:** canon  
-**Last synced:** 2026-06-05 07:47 UTC  
+**Last synced:** 2026-06-19 18:44 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)*
+### Research corpus backfill and model refinement
+Progress: 0/6 done  |  workstream_id: `af85e0a3-ccb8-4cfd-8859-d0794769e3e2`
+
+**Open tasks:**
+- · Backfill Provisioning And Federation Source Notes  `fb88b28d`
+- · Backfill Authorization And Social Graph Source Notes  `bc684b78`
+- · Backfill Verifiable Claims And Entity-Resolution Source Notes  `d73ac6a7`
+- · Refresh Terminology Artifacts From Corpus  `dc1ca5f0`
+- · Refine Conceptual Model Against Scenario Tests  `989b1e68`
+- · Reconcile Canon Surfaces And Open Questions  `5e05f41d`
 
 ---
 ## MCP Orientation (when available)