diff --git a/conductor/tracks/fix_rrule_type_error_20260219/plan.md b/conductor/tracks/fix_rrule_type_error_20260219/plan.md
index 2548519..e3c2fb1 100644
--- a/conductor/tracks/fix_rrule_type_error_20260219/plan.md
+++ b/conductor/tracks/fix_rrule_type_error_20260219/plan.md
@@ -1,10 +1,10 @@
 # Implementation Plan - Fix `r.replace is not a function`
 
-## Phase 1: Reproduction & Test Setup
+## Phase 1: Reproduction & Test Setup [checkpoint: df0ddaf]
 - [x] Task: Create a reproduction test case 1a36c64
     - [x] Create a new test case in `icalendar_test.ts` that mocks an event with a non-string `rrule` property (e.g., an object or number).
     - [x] Run the test to confirm it fails with the expected `TypeError`.
-- [ ] Task: Conductor - User Manual Verification 'Reproduction & Test Setup' (Protocol in workflow.md)
+- [x] Task: Conductor - User Manual Verification 'Reproduction & Test Setup' (Protocol in workflow.md)
 
 ## Phase 2: Implementation
 - [ ] Task: Implement defensive check in `icalendar.ts`