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 skills add terrylica/cc-skills --skill calendar-event-managergit clone --depth 1 https://github.com/terrylica/cc-skillsWrote 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.
[](https://agentmods.dev/skills/terrylica/cc-skills/calendar-event-manager)<a href="https://agentmods.dev/skills/terrylica/cc-skills/calendar-event-manager"><img src="https://agentmods.dev/badge/skills/terrylica/cc-skills/calendar-event-manager/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.
<a href="https://agentmods.dev/skills/terrylica/cc-skills/calendar-event-manager"><img src="https://agentmods.dev/badge/skills/terrylica/cc-skills/calendar-event-manager.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 1 finding, up to high
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- high Rogue Agent · line 323 Skill modifies its own code, configuration, or behavior at runtime. Self-modification enables an agent to escalate privileges, disable safety constraints, or install persistent backdoors.Fix: Prevent the skill from modifying its own code, SKILL.md, or configuration files. Treat skill files as read-only at runtime.
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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00034 | $0.03355 |
| Opus 5 | $0.00017 | $0.01677 |
| Sonnet 5 | $0.00007 | $0.00671 |
| Haiku 4.5 | $0.00003 | $0.00335 |
Grade A, and why
calendar-event-manager 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 6d ago.
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 — 326 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Calendar Event Manager
Create macOS Calendar events with tiered sound alarms and paired Reminders so events are never missed across Mac and iOS.
Self-Evolving Skill: This skill improves through use. If instructions are wrong, parameters drifted, or a workaround was needed — fix this file immediately, don't defer. Only update for real, reproducible issues.
CRITICAL RULES (Hard-Learned Truths 2026-02-12)
These rules are NON-NEGOTIABLE. Violating any of them defeats the purpose of this skill.
1. Calendar + Reminders ALWAYS Together
Every event MUST create BOTH:
- Calendar event with multiple
sound alarmentries (custom sound per tier) - Reminders (3 minimum) as a separate notification channel
Never create one without the other.
2. Use sound alarm, NOT display alarm
-- CORRECT: audible alert with custom sound
make new sound alarm at end of sound alarms with properties {trigger interval:-60, sound name:"Glass"}
-- WRONG: silent visual banner only
make new display alarm at end of display alarms with properties {trigger interval:-60}
Each alarm supports its own sound name property. Use DIFFERENT sounds for different tiers so the user knows which alert level it is by sound alone.
3. ONLY Long Sounds (>= 1.4 seconds)
Short sounds get missed and ignored. NEVER use sounds under 1.4 seconds.
APPROVED sounds only:
| Sound | Duration | Use For |
|---|---|---|
| Funk | 2.16s | At event time (loudest) |
| Glass | 1.65s | 1 hour before |
| Pop | 1.63s | Morning-of / 3 hrs before |
| Sosumi | 1.54s | Day-before |
| Ping | 1.50s | 30 min before |
| Submarine | 1.49s | Alternative |
| Blow | 1.40s | Gentle early reminder |
BANNED sounds: Hero, Basso, Bottle, Purr, Frog, Morse, Tink (all < 1.4s)
4. Multiple Early Reminders Are Mandatory
What ships with it
2 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.
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.
- 6d ago First seen · 326 lines · 34 tokens per session scan A 61d6024ef7f4
calendar-event-manager is a skill published in the GitHub repository terrylica/cc-skills (72 stars, last pushed yesterday), licensed MIT. It adds 34 tokens to every session and 3,355 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 2026-09-05.
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