What is outlook_calendar?

A connector for Outlook Calendar, Microsoft's calendar service. It can find, read, create, change, and delete calendar events.

Use it to check schedules, create meetings or all-day events, add attendees and locations, update event details, and cancel events.

It lets the agent manage appointments without requiring manual calendar editing. It can also search events within specified dates or by text.

outlook_calendar — Skill for Claude Code and Codex by asgeirtj

About the project

System Prompts Leaks is a collection of captured system instructions used to guide AI chatbots and coding agents before they receive user messages. It serves researchers and developers studying how different AI assistants are directed.

asgeirtj/system_prompts_leaks · 69,084 stars · on GitHub

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 asgeirtj/system_prompts_leaks --skill outlook-calendar

Clone the repo

git clone --depth 1 https://github.com/asgeirtj/system_prompts_leaks

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/asgeirtj/system_prompts_leaks/outlook-calendar/github.svg)](https://agentmods.dev/skills/asgeirtj/system_prompts_leaks/outlook-calendar)

Your own site

<a href="https://agentmods.dev/skills/asgeirtj/system_prompts_leaks/outlook-calendar"><img src="https://agentmods.dev/badge/skills/asgeirtj/system_prompts_leaks/outlook-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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/asgeirtj/system_prompts_leaks/outlook-calendar"><img src="https://agentmods.dev/badge/skills/asgeirtj/system_prompts_leaks/outlook-calendar.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 19 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,228 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.

Model	Per session	Once invoked
Fable 5.1	$0.00019	$0.01228
Opus 5.5	$0.00008	$0.00491
Sonnet 5.5	$0.00004	$0.00246
Haiku 4.5	$0.00002	$0.00123

Measured 3d ago against content hash ea0686c55877, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

outlook_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 3d 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.

Meta/muse-agent/skills/outlook-calendar/SKILL.md · 74 lines

How it starts

The opening of the file, as written. The whole thing — 74 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Outlook Calendar

Purpose

Manage Outlook Calendar events with the outlook-calendar companion CLI. The connector supports both personal Microsoft accounts and Microsoft 365 work or school accounts.

Tooling

Use exec to run the installed CLI directly from PATH.

outlook-calendar --status
outlook-calendar disconnect
outlook-calendar list --page-size 10 [--time-min <RFC3339>] [--time-max <RFC3339>] [--query <text>] [--page-token <token>]
outlook-calendar get "<event_id>"
outlook-calendar create --summary "<title>" --start "<RFC3339-or-date>" --end "<RFC3339-or-date>" --timezone "<iana_tz>" [--attendee <email>] [--location <text>] [--description <text>] [--all-day]
outlook-calendar update "<event_id>" [--summary <title>] [--start <RFC3339>] [--end <RFC3339>] [--timezone <iana_tz>] [--location <text>] [--description <text>]
outlook-calendar delete "<event_id>"

For list, use --page-size for result count. --top, --limit, and --max-results are compatibility aliases only; do not use them in new commands. list uses --time-min / --time-max for time bounds. --start and --end are canonical only for create / update; list accepts them only as compatibility aliases.

JSON output contract:

disconnect: parse ok, action, status, and disconnect_url.
list: parse ok, count, next_page_token (when present, pass back as --page-token), retrieved_at, and events[] with fields such as id, summary, description, start, end, event_starts_at, event_ends_at, location, is_all_day, and attendees.
get: parse ok, retrieved_at, and event.
create / update: parse ok, action, event_id, and web_link.
delete: parse ok, action, and event_id.

Auth

This skill uses the CLI-managed Outlook connector. Do not hand-write auth files.

First-use or reconnect flow:

Run outlook-calendar --status.
If the response includes connect_url, replace <connect_url> with the returned URL and share exactly this Markdown link: [Connect Outlook Calendar](<connect_url>); do not paste the raw URL separately. Wait for the user to finish linking.
Re-run the same status command before continuing.
If the response includes disconnect_url, the account is already connected.

Read the full file on GitHub · 74 lines

Files

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.

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.

3d ago First seen · 74 lines · 19 tokens per session scan A ea0686c55877

Subscribe to this mod's changes

outlook_calendar is a skill published in the GitHub repository asgeirtj/system_prompts_leaks (69,084 stars, last pushed today), licensed CC0-1.0. It adds 19 tokens to every session and 1,228 once invoked, about $0.0001 per session on Opus 5.5. 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 2026-10-05.

Claude Code Productivity ai anthropic chatbot chatgpt claude

outlook_calendar

Getting it into your agent

Wrote this? Show the measurements

What it costs to keep this loaded

Grade A, and why

Nothing flagged

How it starts

Outlook Calendar

Purpose

Tooling

Auth

What ships with it

What this file has done since we first saw it

Other skills, from other repositories

google-workspace

simplify-code

himalaya

apple-reminders

apple-notes

imessage