macos-calendar

SKILL.md

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 '<json>' | "$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

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

Always list calendars first if the user hasn't specified one — calendars marked [read-only] cannot be used for event creation

Never use hardcoded date strings in AppleScript — always use offset_days or iso_date

Confirm the calendar name with the user if multiple personal calendars exist

Never target a [read-only] calendar — the script will reject it with an error

For recurring events, consult references/recurrence.md for RRULE syntax

Pass JSON via stdin — never as a CLI argument (avoids leaking data in process list)

All fields are validated by the script (type coercion, range checks, format validation) — invalid input is rejected with an error message

All actions are logged to logs/calendar.log with timestamp, command, calendar, and summary