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 zish-rob-crur/nucleus-apple-mcp --skill nucleus-apple-calendargit clone --depth 1 https://github.com/zish-rob-crur/nucleus-apple-mcpWrote 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/zish-rob-crur/nucleus-apple-mcp/nucleus-apple-calendar)<a href="https://agentmods.dev/skills/zish-rob-crur/nucleus-apple-mcp/nucleus-apple-calendar"><img src="https://agentmods.dev/badge/skills/zish-rob-crur/nucleus-apple-mcp/nucleus-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.
<a href="https://agentmods.dev/skills/zish-rob-crur/nucleus-apple-mcp/nucleus-apple-calendar"><img src="https://agentmods.dev/badge/skills/zish-rob-crur/nucleus-apple-mcp/nucleus-apple-calendar.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00055 | $0.00542 |
| Opus 5 | $0.00028 | $0.00271 |
| Sonnet 5 | $0.00011 | $0.00108 |
| Haiku 4.5 | $0.00006 | $0.00054 |
Grade A, and why
nucleus-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 12d 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.
What it actually says
Use nucleus-apple calendar ... to inspect, schedule, and mutate Apple Calendar data.
Operating Stance
- Prefer the installed
nucleus-applebinary. - Fall back to
uvx --from nucleus-apple-mcp nucleus-apple ...when onlyuvxis available. - Keep reads narrow: exact time windows first, source or calendar filters when provider choice matters.
- Default recurring edits to
--span this; widen to--span futureonly for explicit series changes. - Preserve explicit timezone offsets from the request.
- Re-read the affected window after mutations that can change IDs or recurrence scope.
Core Workflow
- Resolve source or calendar scope only as far as the task requires.
- Inspect the smallest event window that can answer the question or identify the target event.
- Choose the mutation path from
references/decision-rules.md. - Use
references/commands.mdfor canonical command shapes. - Use
references/failure-modes.mdwhen results are ambiguous or a writable target is unclear.
Task Routing
- Availability or "what is on my calendar" questions: read
references/decision-rules.md#inspection-rules. - Single-event create, edit, move, or delete: read
references/decision-rules.md#mutation-rules. - Recurring-series edits, timezone-sensitive requests, or all-day changes: read
references/decision-rules.md#recurring-and-time-rules. - Duplicate titles, read-only calendars, hidden calendars, or post-edit identifier churn: read
references/failure-modes.md.
Output / Escalation
- Use
--prettyonly for human inspection. - Omit
--prettywhen another tool or script will parse the JSON. - Add
--include-detailsonly when the task depends on location, notes, URL, or event disambiguation.
What ships with it
4 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.
- 12d ago First seen · 38 lines · 55 tokens per session scan A cb0e49987eb0
nucleus-apple-calendar is a skill published in the GitHub repository zish-rob-crur/nucleus-apple-mcp (20 stars, last pushed 8d ago), licensed MIT. It adds 55 tokens to every session and 542 once invoked, about $0.0003 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 2026-08-30.
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