diff --git a/.custodian-brief.md b/.custodian-brief.md
index 3e18aae..ca6d780 100644
--- a/.custodian-brief.md
+++ b/.custodian-brief.md
@@ -2,11 +2,24 @@
 # Custodian Brief — shard-wiki
 
 **Domain:** whynot  
-**Last synced:** 2026-06-14 22:23 UTC  
+**Last synced:** 2026-06-14 23:03 UTC  
 **State Hub:** http://127.0.0.1:8000 *(adjust if running on a remote machine)*
 
 ## Active Workstreams
 
+### core architecture hardening (blueprint review fixes)
+Progress: 0/9 done  |  workstream_id: `7d277f39-f78f-4998-8cab-875f2bf69763`
+
+**Open tasks:**
+- · Re-frame the state model: canonical (sharded + coordination) vs derived  `0bb17223`
+- · Split page identity from content equivalence  `d76a6b07`
+- · Consistency, concurrency & conflict model  `fb91f43f`
+- · Scaling the union: incremental-first, equivalence indexing, rebuild-as-fallback  `eb885f03`
+- · Cache freshness & invalidation protocol  `b031715c`
+- · Capability spectra: orthogonal core, implied positions, interaction subset  `f04ce101`
+- · Elegance pass: layered provenance, common-case projection, policy module & rails  `b84b790f`
+- … and 2 more open tasks
+
 ### federation architecture design
 Progress: 0/18 done  |  workstream_id: `2af4c46d-cbfd-40ea-a94b-d9e60b0f9945`