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- RRULE expansion: list_events now expands recurring events into individual occurrences within the query window using python-dateutil - CalDAV pull sync: new caldav_sync.py + POST /api/events/sync route; imports remote events into the internal store by caldav_uid - Past event search: search_events accepts include_past=true to search historical events; exposed in the LLM tool definition - Internal reminders: migration 0037 adds reminder_minutes + reminder_sent_at columns; event_scheduler.py checks every 5 min and fires push notifications; CalDAV sync job runs hourly - reminder_minutes now stored and returned in create/update routes + tools Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>