diff --git a/.custodian-brief.md b/.custodian-brief.md
index 3c94a52..6dc55d6 100644
--- a/.custodian-brief.md
+++ b/.custodian-brief.md
@@ -2,12 +2,23 @@
 # Custodian Brief — activity-core
 
 **Domain:** custodian  
-**Last synced:** 2026-05-14 13:02 UTC  
+**Last synced:** 2026-05-14 15:49 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)*
+### activity-core WP-0003 — Event Bridge Implementation
+Progress: 0/24 done  |  workstream_id: `b4eb45a9-69e3-4ab0-b00c-67a53c3117c5`
+
+**Open tasks:**
+- · [repo:activity-core] T34: Refactor ActivityDefinition model — add rules/instructions fields  `ca1bf66f`
+- · [repo:activity-core] T35: Create src/activity_core/rules/ module skeleton  `54c25eae`
+- · [repo:activity-core] T36: Implement RuleEvaluator (sandboxed AST walker)  `a1ed0d8b`
+- · [repo:activity-core] T37: Implement InstructionExecutor  `cdd349f1`
+- · [repo:activity-core] T38: Alembic migration — add task_spawn_log table  `4cd9833c`
+- · [repo:activity-core] T39: Implement IssueSink adapter interface and IssucCoreRestSink  `38177fcf`
+- · [repo:activity-core] T40: Formalize EventEnvelope model  `65d77939`
+- … and 17 more open tasks
 
 ---
 ## MCP Orientation (when available)