silverbullet-icalendar/conductor/tracks/fix_rrule_until_conversion_20260219/plan.md

Implementation Plan - Fix RRULE UNTIL Conversion

Phase 1: Reproduction [checkpoint: 02fcb7e]

• Task: Reproduce Invalid UNTIL value error 17de604
  • Add a test case in icalendar_test.ts where rrule object has an until property as a Date.
  • Run the test and confirm it fails with Error: Invalid UNTIL value: [object Object].
• Task: Conductor - User Manual Verification 'Reproduction' (Protocol in workflow.md)

Phase 2: Fix Implementation

• Task: Implement value formatting logic in icalendar.ts
  • Update expandRecurrences to use a helper for property value conversion.
  • Ensure Date objects are formatted as YYYYMMDDTHHMMSSZ.
  • Run the test to confirm it passes.
• Task: Conductor - User Manual Verification 'Fix Implementation' (Protocol in workflow.md)

Phase 3: Verification & Cleanup

• Task: Full Regression Check
  • Run all tests in icalendar_test.ts.
• Task: Conductor - User Manual Verification 'Verification & Cleanup' (Protocol in workflow.md)