diff --git a/conductor/tracks/fix_rrule_type_error_20260219/plan.md b/conductor/tracks/fix_rrule_type_error_20260219/plan.md
index ceeaf12..31a4e97 100644
--- a/conductor/tracks/fix_rrule_type_error_20260219/plan.md
+++ b/conductor/tracks/fix_rrule_type_error_20260219/plan.md
@@ -6,12 +6,12 @@
     - [x] Run the test to confirm it fails with the expected `TypeError`.
 - [x] Task: Conductor - User Manual Verification 'Reproduction & Test Setup' (Protocol in workflow.md)
 
-## Phase 2: Implementation
+## Phase 2: Implementation [checkpoint: 1c48f78]
 - [x] Task: Implement defensive check in `icalendar.ts` d7401dd
     - [x] Modify `expandRecurrences` function to check if `rruleStr` is a string before calling `.replace()`.
     - [x] If `rruleStr` is not a string, log a warning and return the original event (non-recurring fallback).
     - [x] Run the reproduction test again to confirm it passes.
-- [ ] Task: Conductor - User Manual Verification 'Implementation' (Protocol in workflow.md)
+- [x] Task: Conductor - User Manual Verification 'Implementation' (Protocol in workflow.md)
 
 ## Phase 3: Verification & Cleanup
 - [ ] Task: Verify fix and check for regressions