caldav-calendar
Sync and query CalDAV calendars (iCloud, Google, Fastmail, Nextcloud, etc.) using vdirsyncer + khal. Works on Linux.
Best use case
caldav-calendar is best used when you need a repeatable AI agent workflow instead of a one-off prompt.
Sync and query CalDAV calendars (iCloud, Google, Fastmail, Nextcloud, etc.) using vdirsyncer + khal. Works on Linux.
Teams using caldav-calendar should expect a more consistent output, faster repeated execution, less prompt rewriting.
When to use this skill
- You want a reusable workflow that can be run more than once with consistent structure.
When not to use this skill
- You only need a quick one-off answer and do not need a reusable workflow.
- You cannot install or maintain the underlying files, dependencies, or repository context.
Installation
Claude Code / Cursor / Codex
Manual Installation
- Download SKILL.md from GitHub
- Place it in
.claude/skills/caldav-calendar/SKILL.mdinside your project - Restart your AI agent — it will auto-discover the skill
How caldav-calendar Compares
| Feature / Agent | caldav-calendar | Standard Approach |
|---|---|---|
| Platform Support | Not specified | Limited / Varies |
| Context Awareness | High | Baseline |
| Installation Complexity | Unknown | N/A |
Frequently Asked Questions
What does this skill do?
Sync and query CalDAV calendars (iCloud, Google, Fastmail, Nextcloud, etc.) using vdirsyncer + khal. Works on Linux.
Where can I find the source code?
You can find the source code on GitHub using the link provided at the top of the page.
SKILL.md Source
# CalDAV Calendar (vdirsyncer + khal)
**vdirsyncer** syncs CalDAV calendars to local `.ics` files. **khal** reads and writes them.
## Sync First
Always sync before querying or after making changes:
```bash
vdirsyncer sync
```
## View Events
```bash
khal list # Today
khal list today 7d # Next 7 days
khal list tomorrow # Tomorrow
khal list 2026-01-15 2026-01-20 # Date range
khal list -a Work today # Specific calendar
```
## Search
```bash
khal search "meeting"
khal search "dentist" --format "{start-date} {title}"
```
## Create Events
```bash
khal new 2026-01-15 10:00 11:00 "Meeting title"
khal new 2026-01-15 "All day event"
khal new tomorrow 14:00 15:30 "Call" -a Work
khal new 2026-01-15 10:00 11:00 "With notes" :: Description goes here
```
After creating, sync to push changes:
```bash
vdirsyncer sync
```
## Edit Events (interactive)
`khal edit` is interactive — requires a TTY. Use tmux if automating:
```bash
khal edit "search term"
khal edit -a CalendarName "search term"
khal edit --show-past "old event"
```
Menu options:
- `s` → edit summary
- `d` → edit description
- `t` → edit datetime range
- `l` → edit location
- `D` → delete event
- `n` → skip (save changes, next match)
- `q` → quit
After editing, sync:
```bash
vdirsyncer sync
```
## Delete Events
Use `khal edit`, then press `D` to delete.
## Output Formats
For scripting:
```bash
khal list --format "{start-date} {start-time}-{end-time} {title}" today 7d
khal list --format "{uid} | {title} | {calendar}" today
```
Placeholders: `{title}`, `{description}`, `{start}`, `{end}`, `{start-date}`, `{start-time}`, `{end-date}`, `{end-time}`, `{location}`, `{calendar}`, `{uid}`
## Caching
khal caches events in `~/.local/share/khal/khal.db`. If data looks stale after syncing:
```bash
rm ~/.local/share/khal/khal.db
```
## Initial Setup
### 1. Configure vdirsyncer (`~/.config/vdirsyncer/config`)
Example for iCloud:
```ini
[general]
status_path = "~/.local/share/vdirsyncer/status/"
[pair icloud_calendar]
a = "icloud_remote"
b = "icloud_local"
collections = ["from a", "from b"]
conflict_resolution = "a wins"
[storage icloud_remote]
type = "caldav"
url = "https://caldav.icloud.com/"
username = "your@icloud.com"
password.fetch = ["command", "cat", "~/.config/vdirsyncer/icloud_password"]
[storage icloud_local]
type = "filesystem"
path = "~/.local/share/vdirsyncer/calendars/"
fileext = ".ics"
```
Provider URLs:
- iCloud: `https://caldav.icloud.com/`
- Google: Use `google_calendar` storage type
- Fastmail: `https://caldav.fastmail.com/dav/calendars/user/EMAIL/`
- Nextcloud: `https://YOUR.CLOUD/remote.php/dav/calendars/USERNAME/`
### 2. Configure khal (`~/.config/khal/config`)
```ini
[calendars]
[[my_calendars]]
path = ~/.local/share/vdirsyncer/calendars/*
type = discover
[default]
default_calendar = Home
highlight_event_days = True
[locale]
timeformat = %H:%M
dateformat = %Y-%m-%d
```
### 3. Discover and sync
```bash
vdirsyncer discover # First time only
vdirsyncer sync
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