ms-calendar-skill

ms-calendar-skill is a skill for Claude Code from zeenie-ai/OpenCompany. It costs 30 tokens per session (1,224 once invoked), scanned A, original, MIT.

A tool for managing events in Outlook Calendar, Microsoft’s calendar service, through Microsoft 365.

In plain words
What is it for?
Create, find, change, and delete events, including their times, locations, notes, attendees, and date ranges.
Why use it?
It removes the need to open Outlook and edit events by hand or write Microsoft Graph API requests yourself.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Good fit Create, find, change, and delete events, including their times, locations, notes, attendees, and date ranges.

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Install with agentmods
npx agentmods add skills/zeenie-ai/opencompany/ms-calendar-skill
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 zeenie-ai/OpenCompany --skill ms-calendar-skill
Clone the repo
git clone --depth 1 https://github.com/zeenie-ai/OpenCompany

Made for: Claude Code.

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 ms-calendar-skill

README.md
[![agentmods](https://agentmods.dev/badge/skills/zeenie-ai/opencompany/ms-calendar-skill/github.svg)](https://agentmods.dev/skills/zeenie-ai/opencompany/ms-calendar-skill)
Your own site
<a href="https://agentmods.dev/skills/zeenie-ai/opencompany/ms-calendar-skill"><img src="https://agentmods.dev/badge/skills/zeenie-ai/opencompany/ms-calendar-skill/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 ms-calendar-skill

Your own site · 80×15
<a href="https://agentmods.dev/skills/zeenie-ai/opencompany/ms-calendar-skill"><img src="https://agentmods.dev/badge/skills/zeenie-ai/opencompany/ms-calendar-skill.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 30 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,224 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. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00030 $0.01224
Opus 5 $0.00015 $0.00612
Sonnet 5 $0.00006 $0.00245
Haiku 4.5 $0.00003 $0.00122

Measured 12d ago against content hash 2106f0f3a159, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

ms-calendar-skill 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.

server/skills/productivity_agent/ms-calendar-skill/SKILL.md · 144 lines

How it starts

The opening of the file, as written. The whole thing — 144 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Outlook Calendar Skill

Manage Outlook Calendar events - create, list, update, and delete - using the Microsoft Graph API (Outlook / Microsoft 365).

Tool: ms_calendar

Consolidated Outlook Calendar tool with an operation parameter.

Operations

Operation Description Required Fields
create Create a new event title, start_time, end_time
list List events in a date range (none, defaults to the next 7 days)
update Update an existing event event_id
delete Delete an event event_id

create - Create a new event

Field Type Required Description
operation string Yes Must be "create"
title string Yes Event title/subject
start_time string Yes Start time in ISO 8601 format
end_time string Yes End time in ISO 8601 format
body string No Event description/notes
location string No Event location
attendees string No Comma-separated email addresses
timezone string No IANA/Windows time zone (default: UTC)

Example - Simple event:

{
  "operation": "create",
  "title": "Team Meeting",
  "start_time": "2026-08-10T14:00:00",
  "end_time": "2026-08-10T15:00:00",
  "body": "Weekly team sync"
}

Example - Event with attendees and location:

{
  "operation": "create",
  "title": "Project Review",
  "start_time": "2026-08-10T10:00:00",
  "end_time": "2026-08-10T11:30:00",
  "location": "Conference Room A",
  "attendees": "[email protected], [email protected]",
  "timezone": "Eastern Standard Time"
}

list - List events in a date range

Field Type Required Description
operation string Yes Must be "list"
start_date string No Start of window. ISO 8601, or today / today+Nd (default: today)
end_date string No End of window. ISO 8601, or today+Nd (default: 7 days ahead)
max_results integer No Maximum results (default: 10, max: 250)

Read the full file on GitHub · 144 lines

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. 12d ago First seen · 144 lines · 30 tokens per session scan A 2106f0f3a159

Subscribe to this mod's changes

ms-calendar-skill is a skill published in the GitHub repository zeenie-ai/OpenCompany (883 stars, last pushed today), licensed MIT. It adds 30 tokens to every session and 1,224 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 2026-08-30.