apple-calendar

apple-calendar is a skill for Claude Code, Codex from lisihao/Solar. It costs 23 tokens per session (426 once invoked), scanned A, original, MIT.

A macOS integration for Apple Calendar that can read, search, create, update, and delete calendar events.

In plain words
What is it for?
Use it to list calendars, find events, schedule meetings, edit event details, and manage recurring events.
Why use it?
It lets an agent manage calendar information without manually switching to Calendar.app.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to list calendars, find events, schedule meetings, edit event details, and manage recurring events.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/lisihao/solar/apple-calendar
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 lisihao/Solar --skill apple-calendar
Clone the repo
git clone --depth 1 https://github.com/lisihao/Solar

Made for: Claude Code, Codex.

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 apple-calendar

README.md
[![agentmods](https://agentmods.dev/badge/skills/lisihao/solar/apple-calendar/github.svg)](https://agentmods.dev/skills/lisihao/solar/apple-calendar)
Your own site
<a href="https://agentmods.dev/skills/lisihao/solar/apple-calendar"><img src="https://agentmods.dev/badge/skills/lisihao/solar/apple-calendar/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 apple-calendar

Your own site · 80×15
<a href="https://agentmods.dev/skills/lisihao/solar/apple-calendar"><img src="https://agentmods.dev/badge/skills/lisihao/solar/apple-calendar.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 23 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 426 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. 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 $0.00023 $0.00426
Opus 5 $0.00012 $0.00213
Sonnet 5 $0.00005 $0.00085
Haiku 4.5 $0.00002 $0.00043

Measured 5d ago against content hash 7d95b82db94b, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

apple-calendar scanned grade A with 0 findings 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 5d ago.

The scan reads SKILL.md. This mod also ships 7 executable files (scripts/cal-create.sh, scripts/cal-delete.sh, scripts/cal-events.sh, …), 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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/apple-calendar/SKILL.md · 46 lines

What it actually says

Apple Calendar

Interact with Calendar.app via AppleScript. Run scripts from: cd {baseDir}

Commands

Command Usage
List calendars scripts/cal-list.sh
List events scripts/cal-events.sh [days_ahead] [calendar_name]
Read event scripts/cal-read.sh <event-uid> [calendar_name]
Create event scripts/cal-create.sh <calendar> <summary> <start> <end> [location] [description] [allday] [recurrence]
Update event scripts/cal-update.sh <event-uid> [--summary X] [--start X] [--end X] [--location X] [--description X]
Delete event scripts/cal-delete.sh <event-uid> [calendar_name]
Search events scripts/cal-search.sh <query> [days_ahead] [calendar_name]

Date Format

  • Timed: YYYY-MM-DD HH:MM
  • All-day: YYYY-MM-DD

Recurrence

Pattern RRULE
Daily 10x FREQ=DAILY;COUNT=10
Weekly M/W/F FREQ=WEEKLY;BYDAY=MO,WE,FR
Monthly 15th FREQ=MONTHLY;BYMONTHDAY=15

Output

  • Events/search: UID | Summary | Start | End | AllDay | Location | Calendar
  • Read: Full details with description, URL, recurrence

Notes

  • Read-only calendars (Birthdays, Holidays) can't be modified
  • Calendar names are case-sensitive
  • Deleting recurring events removes entire series
Files

What ships with it

9 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. 5d ago First seen · 46 lines · 23 tokens per session scan A 7d95b82db94b

Subscribe to this mod's changes

apple-calendar is a skill published in the GitHub repository lisihao/Solar (2 stars, last pushed 26d ago), licensed MIT. It adds 23 tokens to every session and 426 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.