Macos Calendar

macOS Calendar

Manage Apple Calendar events via $SKILL_DIR/scripts/calendar.sh. All date handling uses relative math (current date + N * days) to avoid locale issues (FR/EN/DE date formats).

Quick start

List calendars

Always list calendars first to find the correct calendar name:

"$SKILL_DIR/scripts/calendar.sh" list-calendars

Create an event

echo '' | "$SKILL_DIR/scripts/calendar.sh" create-event

JSON fields:

| Field | Required | Default | Description | |---|---|---|---| | summary | yes | - | Event title | | calendar | no | first calendar | Calendar name (from list-calendars) | | description | no | "" | Event notes | | offset_days | no | 0 | Days from today (0=today, 1=tomorrow, 7=next week) | | iso_date | no | - | Absolute date YYYY-MM-DD (overrides offset_days) | | hour | no | 9 | Start hour (0-23) | | minute | no | 0 | Start minute (0-59) | | duration_minutes | no | 30 | Duration | | alarm_minutes | no | 0 | Alert N minutes before (0=no alarm) | | all_day | no | false | All-day event | | recurrence | no | - | iCal RRULE string. See [references/recurrence.md](references/recurrence.md) |

Interpreting natural language

Map user requests to JSON fields:

| User says | JSON | |---|---| | "tomorrow at 2pm" | offset_days: 1, hour: 14 | | "in 3 days" | offset_days: 3 | | "next Monday at 10am" | Calculate offset_days from today to next Monday, hour: 10 | | "February 25 at 3:30pm" | iso_date: "2026-02-25", hour: 15, minute: 30 | | "every weekday at 9am" | hour: 9, recurrence: "FREQ=WEEKLY;BYDAY=MO,TU,WE,TH,FR" | | "remind me 1 hour before" | alarm_minutes: 60 | | "all day event on March 1" | iso_date: "2026-03-01", all_day: true |

For "next Monday", "next Friday" etc: compute the day offset using the current date. Use date command if needed:

# Days until next Monday (1=Monday)
target=1; today=$(date +%u); echo $(( (target - today + 7) % 7 ))

Example prompts

These are real user prompts and the commands you should run:

"Remind me to call the dentist in 2 days"

"$SKILL_DIR/scripts/calendar.sh" list-calendars

Then:

echo '{"calendar":"Personnel","summary":"Call dentist","offset_days":2,"hour":9,"duration_minutes":15,"alarm_minutes":30}' | "$SKILL_DIR/scripts/calendar.sh" create-event

"Schedule a team sync every Tuesday at 2pm with a 10-min reminder"

echo '{"calendar":"Work","summary":"Team sync","hour":14,"duration_minutes":60,"recurrence":"FREQ=WEEKLY;BYDAY=TU","alarm_minutes":10}' | "$SKILL_DIR/scripts/calendar.sh" create-event

"Block July 15 as a vacation day"

echo '{"calendar":"Personnel","summary":"Vacances","iso_date":"2026-07-15","all_day":true}' | "$SKILL_DIR/scripts/calendar.sh" create-event

"I have a doctor appointment next Thursday at 3:30pm, remind me 1 hour before"

# First compute offset_days to next Thursday (4=Thursday)
target=4; today=$(date +%u); offset=$(( (target - today + 7) % 7 )); [ "$offset" -eq 0 ] && offset=7

Then:

echo "{\"calendar\":\"Personnel\",\"summary\":\"Doctor appointment\",\"offset_days\":$offset,\"hour\":15,\"minute\":30,\"duration_minutes\":60,\"alarm_minutes\":60}" | "$SKILL_DIR/scripts/calendar.sh" create-event

"Set up a daily standup at 9am on weekdays for the next 4 weeks"

echo '{"calendar":"Work","summary":"Daily standup","hour":9,"duration_minutes":15,"recurrence":"FREQ=WEEKLY;BYDAY=MO,TU,WE,TH,FR;COUNT=20"}' | "$SKILL_DIR/scripts/calendar.sh" create-event

"Add a biweekly 1-on-1 with my manager on Fridays at 11am"

echo '{"calendar":"Work","summary":"1-on-1 Manager","hour":11,"duration_minutes":30,"recurrence":"FREQ=WEEKLY;INTERVAL=2;BYDAY=FR","alarm_minutes":5}' | "$SKILL_DIR/scripts/calendar.sh" create-event

Critical rules

1. Always list calendars first if the user hasn't specified one — calendars marked [read-only] cannot be used for event creation
2. Never use hardcoded date strings in AppleScript — always use offset_days or iso_date
3. Confirm the calendar name with the user if multiple personal calendars exist
4. Never target a [read-only] calendar — the script will reject it with an error
5. For recurring events, consult [references/recurrence.md](references/recurrence.md) for RRULE syntax
6. Pass JSON via stdin — never as a CLI argument (avoids leaking data in process list)
7. All fields are validated by the script (type coercion, range checks, format validation) — invalid input is rejected with an error message
8. All actions are logged to logs/calendar.log with timestamp, command, calendar, and summary

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: lucaperret
• Source: lucaperret/agent-skills
• License: MIT

Install and usage instructions live in the source repository linked above.