diff --git a/.custodian-brief.md b/.custodian-brief.md
index 9fdbbe8..a850278 100644
--- a/.custodian-brief.md
+++ b/.custodian-brief.md
@@ -2,12 +2,21 @@
 # Custodian Brief — shard-wiki
 
 **Domain:** whynot  
-**Last synced:** 2026-06-15 08:13 UTC  
+**Last synced:** 2026-06-15 08:29 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)*
+### write path — overlay engine, writable adapter, apply-under-drift
+Progress: 0/6 done  |  workstream_id: `12bed418-39d6-47fa-a359-ff04bae6ec99`
+
+**Open tasks:**
+- · Writable file-store adapter + positive write conformance  `80492f8e`
+- · Overlay model + OverlayEngine.draft()  `cc6bf9a3`
+- · Patch rendering  `90d98c16`
+- · apply-under-drift  `2a0179b1`
+- · Overlay-aware union read  `4536d74f`
+- · Wiring into InformationSpace + integration  `ab01fffb`
 
 ---
 ## MCP Orientation (when available)