Configuring Horizon
coollabsio/coolify
A skill your agent uses whenever the user mentions Horizon by name in a Laravel context.
Sync and query CalDAV calendars (iCloud, Google, Fastmail, Nextcloud, etc.) using vdirsyncer + khal.
No licenceAuto-check passed
Install Caldav Calendar
$ npx skills add sundial-org/awesome-openclaw-skills --skill caldav-calendar -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install sundial-org/awesome-openclaw-skills caldav-calendar --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/sundial-org/awesome-openclaw-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/caldav-calendar .claude/skills/caldav-calendar && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "caldav-calendar" agent skill from https://github.com/sundial-org/awesome-openclaw-skills/tree/main/skills/caldav-calendar into .claude/skills/caldav-calendar/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "caldav-calendar", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/sundial-org/awesome-openclaw-skills/tree/main/skills/caldav-calendarType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add sundial-org/awesome-openclaw-skills --skill caldav-calendar -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install sundial-org/awesome-openclaw-skills caldav-calendar --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/sundial-org/awesome-openclaw-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/caldav-calendar .agents/skills/caldav-calendar && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "caldav-calendar" agent skill from https://github.com/sundial-org/awesome-openclaw-skills/tree/main/skills/caldav-calendar into .agents/skills/caldav-calendar/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "caldav-calendar", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add sundial-org/awesome-openclaw-skills --skill caldav-calendar -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install sundial-org/awesome-openclaw-skills caldav-calendar --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/sundial-org/awesome-openclaw-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/caldav-calendar .cursor/skills/caldav-calendar && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "caldav-calendar" agent skill from https://github.com/sundial-org/awesome-openclaw-skills/tree/main/skills/caldav-calendar into .cursor/skills/caldav-calendar/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "caldav-calendar", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/sundial-org/awesome-openclaw-skills.git --path skills/caldav-calendar--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add sundial-org/awesome-openclaw-skills --skill caldav-calendar -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install sundial-org/awesome-openclaw-skills caldav-calendar --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/sundial-org/awesome-openclaw-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/caldav-calendar .gemini/skills/caldav-calendar && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "caldav-calendar" agent skill from https://github.com/sundial-org/awesome-openclaw-skills/tree/main/skills/caldav-calendar into .gemini/skills/caldav-calendar/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "caldav-calendar", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install sundial-org/awesome-openclaw-skills caldav-calendarInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add sundial-org/awesome-openclaw-skills --skill caldav-calendar -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/sundial-org/awesome-openclaw-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/caldav-calendar .github/skills/caldav-calendar && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "caldav-calendar" agent skill from https://github.com/sundial-org/awesome-openclaw-skills/tree/main/skills/caldav-calendar into .github/skills/caldav-calendar/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "caldav-calendar", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add sundial-org/awesome-openclaw-skills --skill caldav-calendar -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install sundial-org/awesome-openclaw-skills caldav-calendar --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/sundial-org/awesome-openclaw-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/caldav-calendar .opencode/skills/caldav-calendar && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "caldav-calendar" agent skill from https://github.com/sundial-org/awesome-openclaw-skills/tree/main/skills/caldav-calendar into .opencode/skills/caldav-calendar/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "caldav-calendar", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
caldav-calendar- GitHub stars
- 663
- Used in
- 2 other repos
- Token cost
- ~865 tokens
- SKILL.md length
- 149 words
- Files
- 1
- Skills in repo
- 383
- Repo updated
- First seen
- Licence
- None found
At a glance
Sync and query CalDAV calendars (iCloud, Google, Fastmail, Nextcloud, etc.) using vdirsyncer + khal.
- Works in 3 steps: Configure vdirsyncer… → Configure khal (~/.config/khal/config) → Discover and sync
- SKILL.md covers Sync First, View Events, Search and Create Events, plus 5 more sections
- Reaches caldav.icloud.com and caldav.fastmail.com
What it does
Caldav Calendar is an agent skill from sundial-org/awesome-openclaw-skills. Sync and query CalDAV calendars (iCloud, Google, Fastmail, Nextcloud, etc.) using vdirsyncer + khal. Works on Linux.
Its SKILL.md is about 870 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It works with Linux. The repository describes itself as: Top OpenClaw skills, with the most popular and useful ones.
Example prompts
- “/caldav-calendar”
Workflow steps
3 steps, taken from the step headings in SKILL.md.
- Configure vdirsyncer (~/.config/vdirsyncer/config)
- Configure khal (~/.config/khal/config)
- Discover and sync
What it can do on your machine
Read from SKILL.md and the folder at commit b80cde2. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md (its code samples are bash and ini).
From the folder's file list and the shell code blocks in SKILL.md.
Network
Hosts in commands or code, which the agent is likely to contact:
caldav.icloud.comcaldav.fastmail.com
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Caldav Calendar loads about 865 tokens when it runs. Until then it costs about 33 tokens; SKILL.md has 149 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
Without a licence we can't republish the file, so here is its outline and opening line. It has 149 words (~865 tokens).
“vdirsyncer syncs CalDAV calendars to local .ics files. khal reads and writes them.”
- name
- caldav-calendar
Files
Just SKILL.md in skills/caldav-calendar of sundial-org/awesome-openclaw-skills.
Open the folder on GitHubat commit b80cde2
Used in 2 other repositories
We found 2 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 2 other GitHub owners. This page covers the copy in sundial-org/awesome-openclaw-skills, which our catalogue first saw on October 7, 2026.
Compare with similar skills
Caldav Calendar next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Caldav Calendar this skillsundial-org/awesome-openclaw-skills | 663 | 2 repos | ~865 | Automated safety check: Pass | None | |
| Configuring Horizoncoollabsio/coolify | 63k | 4 repos | ~898 | Automated safety check: Pass | MIT | |
| Model Usageopenclaw/openclaw | 392k | 1 repos | ~637 | Automated safety check: Pass | MIT | |
| Engine Whats Newflutter/flutter | 180k | — | ~978 | Automated safety check: Pass | BSD-3-Clause | |
| Openclaw Live Updateropenclaw/openclaw | 392k | — | ~3.7k | Automated safety check: Pass | MIT | |
| Upgrade Browserflutter/flutter | 180k | — | ~1.1k | Automated safety check: Pass | BSD-3-Clause |
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Maintain the canonical live OpenClaw main checkout, macOS LaunchAgent-managed Gateway, local macOS app, exact-head main CI, and recurring full release validation.
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Comprehensive guide for implementing NetworkPolicy, PodSecurityPolicy, RBAC, and Pod Security Standards in Kubernetes.
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Related
Works with
Questions about Caldav Calendar
What does Caldav Calendar do?
Sync and query CalDAV calendars (iCloud, Google, Fastmail, Nextcloud, etc.) using vdirsyncer + khal. Caldav Calendar is an agent skill from sundial-org/awesome-openclaw-skills.) using vdirsyncer + khal.
How do I install Caldav Calendar in Claude Code?
Run `npx skills add sundial-org/awesome-openclaw-skills --skill caldav-calendar -a claude-code`. Or copy the skill folder (skills/caldav-calendar in sundial-org/awesome-openclaw-skills) into .claude/skills/caldav-calendar in your project. Claude Code loads it when a task matches its description.
How do I install Caldav Calendar in Codex?
Run `npx skills add sundial-org/awesome-openclaw-skills --skill caldav-calendar -a codex`. Or copy the skill folder (skills/caldav-calendar in sundial-org/awesome-openclaw-skills) into .agents/skills/caldav-calendar in your project. Codex loads it when a task matches its description.
Can I use Caldav Calendar in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add sundial-org/awesome-openclaw-skills --skill caldav-calendar -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/caldav-calendar, .gemini/skills/caldav-calendar, .github/skills/caldav-calendar and .opencode/skills/caldav-calendar in your project.
What does Caldav Calendar need to run?
SKILL.md names no scripts, command-line tools or credentials: Caldav Calendar is instructions for the agent only.
Does Caldav Calendar access the network?
SKILL.md names 2 domains. In commands or code: caldav.icloud.com and caldav.fastmail.com; the agent is likely to contact these when it follows the instructions. This is read from the text; nothing was executed.
Is Caldav Calendar safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Caldav Calendar use?
No licence was found for Caldav Calendar or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does Caldav Calendar use?
About 865 tokens (SKILL.md is roughly 3.5k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Caldav Calendar?
Skills that share tags, products or a category with Caldav Calendar: Configuring Horizon (coollabsio/coolify, 63k stars), Model Usage (openclaw/openclaw, 392k stars), Engine Whats New (flutter/flutter, 180k stars) and Openclaw Live Updater (openclaw/openclaw, 392k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Caldav Calendar?
sundial-org (a GitHub organization) maintains it in sundial-org/awesome-openclaw-skills, which has 663 GitHub stars. The repository holds 383 skills in this directory. The repository was last updated on March 7, 2026.
Source: sundial-org/awesome-openclaw-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.