apple-calendar

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• SKILL.md

SKILL.md (first lines)

# Apple Calendar

Use this skill for macOS Calendar.app and `.ics` workflows.

## Scope

- draft or import `.ics` files
- review or manage Apple Calendar events on the host Mac
- coordinate one-off calendar actions through the Calendar app or an existing
  local CLI

## Default Strategy

1. Confirm title, date, timezone, and attendees before creating anything.
2. If the task is mostly event creation, prefer a generated `.ics` file that the
   user can import into Calendar.
3. If the user already has a local calendar CLI such as `icalBuddy`, use it for
   read-heavy workflows.
4. For writes in Calendar.app itself, prepare the exact event details first and
   only then trigger the host-side action.

## `.ics` Workflow

Use `.ics` when the user wants a portable calendar event or invite draft.
Generate a fresh UID and timestamp for each event so repeated imports do not
collide and the file does not go stale.

Minimal event template:

```bash
EVENT_UID="$(uuidgen)@hybridclaw"
EVENT_STAMP="$(date -u +%Y%m%dT%H%M%SZ)"
EVENT_START_UTC="YYYYMMDDTHHMMSSZ"
EVENT_END_UTC="YYYYMMDDTHHMMSSZ"
cat > event.ics <<EOF
BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//HybridClaw//Apple Calendar//EN
BEGIN:VEVENT
UID:${EVENT_UID}
DTSTAMP:${EVENT_STAMP}
DTSTART:${EVENT_START_UTC}
DTEND:${EVENT_END_UTC}
SUMMARY:Project Review
DESCRIPTION:Review the release checklist.
LOCATION:Berlin Office
END:VEVENT
END:VCALENDAR
EOF
```

Replace `EVENT_START_UTC` and `EVENT_END_UTC` with the actual event times in
UTC before writing the file.

After writing the file, import it with:

```bash
open event.ics
```

## Optional Local CLI

If `icalBuddy` is already installed, it is useful for schedule reads:

```bash
icalBuddy eventsToday
icalBuddy eventsFrom:today to:tomorrow
icalBuddy eventsFrom:today to:7days
```

If no calendar CLI exists, fall back to `.ics` generation or direct Calendar app
interaction on the host.

## Working Rules

- Always state the timezone explicitly when the user gives relative times.
- Never send invites or create events with attendees without explicit
  confirmation.
- If recurrence matters, describe it in plain language before encoding it into
  calendar fields.
- Prefer read-before-write when the user is modifying an existing event.
- If the user says "iCal", treat it as Apple Calendar unless they clearly mean a
  raw `.ics` file format workflow.

## Pitfalls

- Do not assume the Mac's timezone matches the event timezone.
- Do not create all-day events when the user gave a specific time.
- Do not turn reminders or todos into calendar events unless the user wants
  scheduling.

From HybridAIOne/hybridclaw, MIT.

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