diff --git a/.custodian-brief.md b/.custodian-brief.md
index 8a71af7..c021267 100644
--- a/.custodian-brief.md
+++ b/.custodian-brief.md
@@ -2,11 +2,56 @@
 # Custodian Brief — markitect-tool
 
 **Domain:** markitect  
-**Last synced:** 2026-05-03 21:10 UTC  
+**Last synced:** 2026-05-03 21:43 UTC  
 **State Hub:** http://127.0.0.1:8000 *(adjust if running on a remote machine)*
 
 ## Active Workstreams
 
+### Access-Controlled Knowledge Gateway
+Progress: 0/6 done  |  workstream_id: `f36acbc9-881d-46f2-9181-67de228df0c2`
+
+**Open tasks:**
+- · P9.1 - Define access-control ladder  `acf240b4`
+- · P9.2 - Implement local label policy  `9eb589d2`
+- · P9.3 - Add policy-aware query filtering  `d78ab623`
+- · P9.4 - Add relationship policy adapter design  `bd4c2b7a`
+- · P9.5 - Add rule policy adapter design  `752f1962`
+- · P9.6 - Add decision logs and explainability  `990f01fa`
+
+### Agent Working Memory Context Cache
+Progress: 0/6 done  |  workstream_id: `6269f338-4f5c-40ee-90e5-0371f5c3874c`
+
+**Open tasks:**
+- · P8.1 - Define context package schema  `21ee9c37`
+- · P8.2 - Implement package creation from queries  `4df06b93`
+- · P8.3 - Implement activation lifecycle  `9f3d9792`
+- · P8.4 - Add memory namespaces  `2d090494`
+- · P8.5 - Add summary layers  `4d1cf970`
+- · P8.6 - Add CLI commands  `2f18386c`
+
+### Advanced Query and Local Index Backend
+Progress: 0/7 done  |  workstream_id: `d61a82e4-651a-4df2-944a-9ff996b2e1f6`
+
+**Open tasks:**
+- · P7.1 - Implement local snapshot store  `8894a9a4`
+- · P7.2 - Add AST introspection commands  `fb9eaa9d`
+- · P7.3 - Add optional JSONPath query adapter  `a7b46b32`
+- · P7.4 - Build SQLite metadata and JSON index  `479f11a3`
+- · P7.5 - Add FTS5 section/block search  `0f03e9be`
+- · P7.6 - Add incremental refresh  `7d9472e6`
+- · P7.7 - Add local index CLI  `35cc63ff`
+
+### Optional Cache Backend Architecture Core
+Progress: 0/6 done  |  workstream_id: `0c585f8a-5c7e-4c89-b785-5b0089180256`
+
+**Open tasks:**
+- · P6.1 - Define backend capability model  `8c04f146`
+- · P6.2 - Define snapshot model and content identity  `5debc135`
+- · P6.3 - Define backend interfaces  `a3e37112`
+- · P6.4 - Implement local backend registry  `6c9b8765`
+- · P6.5 - Add provenance envelope  `7b551eae`
+- · P6.6 - Add CLI scaffolding  `921e589c`
+
 ### Runtime Context, Form, and Assessment Engines
 Progress: 0/8 done  |  workstream_id: `7918687e-2364-46b1-ab7e-65aa77cb8449`