Icalendar Sync

iCloud Calendar Sync Skill

Synchronizes calendar events between local system and iCloud.

⚠️ Security Requirements

CRITICAL - Read before installation:

1. Use App-Specific Password ONLY

• Generate at https://appleid.apple.com/account/security
• NEVER use your main Apple ID password
• Can be revoked anytime if compromised

2. Use OS Keyring for Credential Storage

The skill stores credentials securely in your operating system's keyring:

• macOS: Keychain
• Windows: Credential Manager
• Linux: Secret Service API

3. For Headless/Automated Environments

For Docker, CI/CD, or headless servers where interactive input is not possible:

Option A: Environment Variables (standard, secure method)

# Set credentials as environment variables
export ICLOUD_USERNAME="user@icloud.com"
export ICLOUD_APP_PASSWORD="xxxx-xxxx-xxxx-xxxx"

# Run setup
python -m icalendar_sync setup --non-interactive

Option B: Docker/Kubernetes Secrets (most secure for containers)

# Docker secrets
docker run --secret icloud_username --secret icloud_password ...

# Kubernetes secrets
kubectl create secret generic icloud-credentials \
  --from-literal=username=user@icloud.com \
  --from-literal=password=xxxx-xxxx-xxxx-xxxx

Credentials are read in this order:

1. OS keyring (if available and configured)
2. Environment variables (if keyring unavailable)
3. Interactive prompt (if neither available)

Installation

./install.sh

Usage

Setup Credentials (Interactive)

# Interactive mode - password prompted securely
python -m icalendar_sync setup --username user@icloud.com

The password will be prompted interactively and stored in OS keyring.

List Calendars

python -m icalendar_sync list

Get Calendar Events

python -m icalendar_sync get --calendar "Personal" --days 7

Create Event

python -m icalendar_sync create \
  --calendar "Personal" \
  --json '{
    "summary": "Meeting",
    "dtstart": "2026-02-15T14:00:00+03:00",
    "dtend": "2026-02-15T15:00:00+03:00"
  }'

Update Event

Update simple event:

python -m icalendar_sync update \
  --calendar "Personal" \
  --uid "event-uid-here" \
  --json '{"summary": "Updated Meeting Title"}'

Update single instance of recurring event:

python -m icalendar_sync update \
  --calendar "Work" \
  --uid "recurring-event-uid" \
  --recurrence-id "2026-02-20T09:00:00+03:00" \
  --mode single \
  --json '{"dtstart": "2026-02-21T09:00:00+03:00"}'

Update all instances:

python -m icalendar_sync update \
  --calendar "Work" \
  --uid "recurring-event-uid" \
  --mode all \
  --json '{"summary": "New Title for All Instances"}'

Update this and future instances:

python -m icalendar_sync update \
  --calendar "Work" \
  --uid "recurring-event-uid" \
  --recurrence-id "2026-03-01T09:00:00+03:00" \
  --mode future \
  --json '{"dtstart": "2026-03-01T14:00:00+03:00"}'

Delete Event

python -m icalendar_sync delete --calendar "Personal" --uid "event-uid-here"

Requirements

• Python 3.9+
• iCloud app-specific password
• Access to iCloud CalDAV server (caldav.icloud.com:443)

Security Features

• ✅ OS keyring integration for credential storage
• ✅ App-specific password requirement (not main password)
• ✅ SSL/TLS verification enforced
• ✅ Rate limiting (10 calls per 60 seconds)
• ✅ Automatic credential redaction in logs
• ✅ Input validation on all user inputs

License

MIT