diff --git a/documentation/AGENT_TODO.md b/documentation/AGENT_TODO.md
index c09e1b51..b2dd3ca8 100644
--- a/documentation/AGENT_TODO.md
+++ b/documentation/AGENT_TODO.md
@@ -8,6 +8,7 @@
 - [ ] **Step 3:** Implement formal error boundaries for 403/401 API responses to provide user-friendly "Session Expired" or "Access Denied" UI.
 
 ## 🚧 Upcoming High Priority
+- **event_session Search Fix:** Investigate 400 error (`Unauthorized search field 'account_id'`) on `event_session/search`.
 - **Badge Rendering Fix:** Refactor `badge_template` lookup to use V3 Triple ID pattern.
 - **CRUD v2 Refactor:** Finalize retirement of `Element_ae_crud_v2.svelte` in favor of V3 Editor.
 - **Temp Cleanup:** Auto-removal of native `.tmp` files older than 24h.