diff --git a/.custodian-brief.md b/.custodian-brief.md
index a7ee6fb..8df6208 100644
--- a/.custodian-brief.md
+++ b/.custodian-brief.md
@@ -2,11 +2,23 @@
 # Custodian Brief — markitect-tool
 
 **Domain:** markitect  
-**Last synced:** 2026-05-04 20:39 UTC  
+**Last synced:** 2026-05-14 18:08 UTC  
 **State Hub:** http://127.0.0.1:8000 *(adjust if running on a remote machine)*
 
 ## Active Workstreams
 
+### Source Adapter Interface And Markdown Normalization Contract
+Progress: 0/7 done  |  workstream_id: `c4e4511f-13ea-40b4-9083-6d9ab6d12dad`
+
+**Open tasks:**
+- · Canonical source-to-markdown data model  `f8164264`
+- · Adapter registry and discovery hooks  `391fb723`
+- · Architecture boundary and markitect-filter handoff  `a5d05b2a`
+- · Source adapter protocol and capability descriptors  `5036ff34`
+- · Cross-repo migration notes for infospace-bench and markitect-filter  `dfc81c61`
+- · Normalization CLI and public API surface  `c6233bd1`
+- · Contract tests and fake adapter fixture  `263d0351`
+
 ### Render And Document Function Extensions
 Progress: 0/6 done  |  workstream_id: `a38f676a-0d0b-493c-9792-2e34480c3681`