diff --git a/.custodian-brief.md b/.custodian-brief.md
index f6944d9..58113af 100644
--- a/.custodian-brief.md
+++ b/.custodian-brief.md
@@ -2,11 +2,20 @@
 # Custodian Brief — state-hub
 
 **Domain:** custodian  
-**Last synced:** 2026-06-21 21:21 UTC  
+**Last synced:** 2026-06-22 09:57 UTC  
 **State Hub:** http://127.0.0.1:8000 *(adjust if running on a remote machine)*
 
 ## Active Workstreams
 
+### Repo-anchored classification spine (CUST-WP-0050 implementation)
+Progress: 0/4 done  |  workstream_id: `8dc7d106-11e2-41df-b512-89ed69d2a65f`
+
+**Open tasks:**
+- · P1 — Spine migration (single Alembic revision)  `14cf65f1`
+- · P2 — API / MCP / validation surface  `d3afcae1`
+- · P3 — Auto-registration tooling  `bab90f0c`
+- · P4 — Surfaces & cutover  `67c54009`
+
 ### State Hub Full ThreePhoenix HA Migration
 Progress: 0/8 done  |  workstream_id: `8d0c1b5d-44da-4b91-8357-e6526d3e0a85`