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.
npx agentmods add skills/ericboehs/claude-plugins/calendarnpx skills add ericboehs/claude-plugins --skill calendargit clone --depth 1 https://github.com/ericboehs/claude-pluginsWhat 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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00034 | $0.01288 |
| Opus 5 | $0.00017 | $0.00644 |
| Sonnet 5 | $0.00007 | $0.00258 |
| Haiku 4.5 | $0.00003 | $0.00129 |
Grade A, and why
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 yesterday.
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.
How it starts
The opening of the file, as written. The whole thing — 149 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Apple Calendar (ical)
Manage Apple Calendar from the command line using ical — a native macOS Calendar CLI built on EventKit with full CRUD support.
Prerequisites
ical must be installed. If any command fails with "command not found", suggest running /setup-calendar.
Usage
/calendar— Show today's events/calendar tomorrow— Show tomorrow's events/calendar week— Show the next 7 days/calendar add "Team standup" -s "tomorrow 9am" -e "tomorrow 9:30am"— Create event/calendar search "standup"— Search events
Calendar Filtering
Calendars can be excluded from queries using the --exclude-calendar flag (repeatable). Configure excluded calendars in your CLAUDE.md so they're applied automatically. Example CLAUDE.md snippet:
## Calendar Exclusions
When using `/calendar`, always add these flags to list/today/upcoming/search commands:
--exclude-calendar "shared-calendar-name"
To discover available calendars:
ical calendars -o json
Commands
List today's events
ical today -o json
List events for a date range
# Tomorrow
ical list -f tomorrow -t tomorrow -o json
# Next 7 days
ical upcoming 7 -o json
# Specific date range
ical list -f "2026-03-03" -t "2026-03-07" -o json
# Filter by specific calendar
ical list -f today -t today -c "Work" -o json
Show event details
ical show --id "<full-event-id>" -o json
Create events
# Basic event
ical add "Sprint Planning" -s "2026-03-03 10:00" -e "2026-03-03 11:00" -c "Work"
# With location and notes
ical add "Dentist" -s "2026-03-05 14:00" -e "2026-03-05 15:00" -l "123 Main St" -n "Annual checkup"
# All-day event
ical add "PTO" -s "2026-03-10" -a -c "Work"
# With alert
ical add "Deploy window" -s "2026-03-03 16:00" -e "2026-03-03 17:00" --alert 15m
# Recurring event
ical add "Weekly standup" -s "2026-03-03 09:00" -e "2026-03-03 09:30" -r weekly --repeat-days "mon,wed,fri"
Update events
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.
- yesterday First seen · 149 lines · 34 tokens per session scan A 4c33d366341c
calendar is a skill published in the GitHub repository ericboehs/claude-plugins (2 stars, last pushed 8d ago), licensed MIT. It adds 34 tokens to every session and 1,288 once invoked, about $0.0002 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 2026-08-31.
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