Triggers when the user wants to query or modify real calendar data: checking today's or this week's agenda, spotting conflicts, creating meetings, rescheduling, or deleting events. Typical phrasings include "what time is my meeting tomorrow", "book xx for me", or "schedule a meeting". **Do not use for**: casually mentioning times or countdowns in conversation (→ answer directly), or recurring background jobs like "run this script at 9am every day" (→ schedule-ops-skill).