radicale

radicale is a skill for Claude Code from jmagar/claude-homelab. It costs 147 tokens per session (3,101 once invoked), scanned B, original, MIT.

A calendar and contacts workflow for Radicale, a self-hosted server that stores calendars and address books using CalDAV and CardDAV. It supports reading and changing those records.

In plain words
What is it for?
Use it to list, view, create, update, or delete calendar events, and to search or manage contacts.
Why use it?
It lets an agent manage events and contacts in a private Radicale server instead of treating calendar or address-book data as generic text.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: reads .claude/ paths.

Part of the homelab-core plugin — 18 skills, 5 commands, 1 agent shipped together

Good fit Use it to list, view, create, update, or delete calendar events, and to search or manage contacts.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/jmagar/claude-homelab/radicale
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add jmagar/claude-homelab --skill radicale
Clone the repo
git clone --depth 1 https://github.com/jmagar/claude-homelab

Made for: Claude Code.

Or install homelab-core, the plugin that ships this one along with the rest of its 18 skills, 5 commands, 1 agent.

Its marketplace also offers this one on its own, as the plugin radicale/plugin install radicale after adding the marketplace above.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for radicale

README.md
[![agentmods](https://agentmods.dev/badge/skills/jmagar/claude-homelab/radicale/github.svg)](https://agentmods.dev/skills/jmagar/claude-homelab/radicale)
Your own site
<a href="https://agentmods.dev/skills/jmagar/claude-homelab/radicale"><img src="https://agentmods.dev/badge/skills/jmagar/claude-homelab/radicale/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for radicale

Your own site · 80×15
<a href="https://agentmods.dev/skills/jmagar/claude-homelab/radicale"><img src="https://agentmods.dev/badge/skills/jmagar/claude-homelab/radicale.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 147 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,101 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00147 $0.03101
Opus 5 $0.00073 $0.01550
Sonnet 5 $0.00029 $0.00620
Haiku 4.5 $0.00015 $0.00310

Measured 13d ago against content hash 55cd749f3335, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade B, and why

radicale scanned grade B with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 13d ago.

The scan reads SKILL.md. This mod also ships 2 executable files (load-env.sh, scripts/radicale-api.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Asks for rootmediumPrivilege escalation

A mod that escalates privileges can change anything on the machine, not only the project.

- Set permissions: `chmod 600 ~/.claude-homelab/.env`
skills/radicale/SKILL.md · 395 lines

How it starts

The opening of the file, as written. The whole thing — 395 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Radicale CalDAV/CardDAV Management

⚠️ MANDATORY SKILL INVOCATION ⚠️

YOU MUST invoke this skill (NOT optional) when the user mentions ANY of these triggers:

  • "list my calendar", "what's on my calendar", "show me my events", "calendar this week", "when is my next event"
  • "add to my calendar", "create an event", "schedule event", "schedule a meeting"
  • "delete an event", "cancel event", "remove event"
  • "find a contact", "what's someone's email", "search my contacts", "who is"
  • "add a contact", "create contact", "save contact", "save someone's phone number"
  • Any mention of Radicale, CalDAV, CardDAV, calendar events, or contact management

Failure to invoke this skill when triggers occur violates your operational requirements.


Manage calendars (events) and contacts on a self-hosted Radicale server using CalDAV and CardDAV protocols.

Type: Read & Write (calendar events and contacts)

Purpose

This skill enables comprehensive calendar and contact management through a self-hosted Radicale server. It provides read and write access to:

  • Calendars - List, view, create, update, and delete calendar events
  • Contacts - List, search, create, update, and delete contacts in addressbooks

All operations use the Python caldav library which implements the CalDAV (RFC 4791) and CardDAV (RFC 6352) protocols.

Setup

Prerequisites

Install required Python libraries:

pip install caldav vobject icalendar

Script Permissions:

The Python script can be made executable (optional but recommended):

chmod +x ~/claude-homelab/skills/radicale/scripts/radicale-api.py

You can then run it directly:

./scripts/radicale-api.py --help

Or without executable permissions using Python:

python scripts/radicale-api.py --help

Credentials

Add to ~/.claude-homelab/.env:

RADICALE_URL="http://localhost:5232"
RADICALE_USERNAME="admin"
RADICALE_PASSWORD="password"

Security:

  • .env file is gitignored (never commit credentials)
  • Set permissions: chmod 600 ~/.claude-homelab/.env

Read the full file on GitHub · 395 lines

Files

What ships with it

6 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 13d ago First seen · 395 lines · 147 tokens per session scan B 55cd749f3335

Subscribe to this mod's changes

radicale is a skill published in the GitHub repository jmagar/claude-homelab (78 stars, last pushed 1mo ago), licensed MIT. It adds 147 tokens to every session and 3,101 once invoked, about $0.0007 per session on Opus 5. A static security scan graded it B with 1 finding (asks for root). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Related

Other skills, from other repositories

code-search

Select the right search tool (Grep, Glob, codebase-retrieval) to locate existing code, symbols, or files across the project's monorepo. Don't use it for creating new files, implementing features, or reviewing code quality.

atretyak1985/swarmery · 52 tokens

agent-self-scheduling

Schedule AI agent runs with cron, loops, or external clocks while avoiding unsafe tight autonomous timers.

sickn33/agentic-awesome-skills · 24 tokens

python-release

Handle Python SDK release, build, bump, packaging metadata, PyPI client pin, uv.lock, nox/build workflow, and publish verification changes. Use for Python release process work or dependency pin bumps; do not use for ordinary Python feature implementation.

ComposioHQ/composio · 53 tokens

computer-use

Read and drive native desktop applications through the accessibility layer — list on-screen apps, snapshot one window as a numbered element tree, then click / type / set a value / scroll / drag / run a named action, by element index or by screen coordinates. Use for work in a desktop app rather than a web page. Full…

kirodotdev/KiroCrew · 105 tokens

workspace-digest

Summarize the files saved in this assistant's shared workspace. Use when the user asks what is in their workspace, for a file inventory, or a digest of saved work.

cloudflare/agents · 40 tokens

notion_synthesize

Synthesize durable ktx wiki pages and semantic-layer sources from staged Notion pages, databases, data-source rows, and clustered Notion evidence. Load when a WorkUnit contains Notion raw files or Notion evidence chunks.

Kaelio/ktx · 50 tokens