diff --git a/conductor/tracks/fix_recurring_visibility_20260219/plan.md b/conductor/tracks/fix_recurring_visibility_20260219/plan.md
index a99f5d6..54c0f5c 100644
--- a/conductor/tracks/fix_recurring_visibility_20260219/plan.md
+++ b/conductor/tracks/fix_recurring_visibility_20260219/plan.md
@@ -11,7 +11,7 @@
     - [x] Verify that it returns only 1 event (the bug).
 - [x] Task: Conductor - User Manual Verification 'Investigation & Reproduction' (Protocol in workflow.md)
 
-## Phase 2: Fix Logic
+## Phase 2: Fix Logic [checkpoint: a4acfa1]
 - [x] Task: Support Object RRULE in `expandRecurrences` f7f6028
     - [x] Modify `expandRecurrences` to handle `rrule` as an object.
     - [x] It likely needs to be converted back to a string or used directly if `rrule` library supports it.