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 pnp/sharepoint-skills --skill guest-access-reviewergit clone --depth 1 https://github.com/pnp/sharepoint-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/pnp/sharepoint-skills/guest-access-reviewer)<a href="https://agentmods.dev/skills/pnp/sharepoint-skills/guest-access-reviewer"><img src="https://agentmods.dev/badge/skills/pnp/sharepoint-skills/guest-access-reviewer/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/pnp/sharepoint-skills/guest-access-reviewer"><img src="https://agentmods.dev/badge/skills/pnp/sharepoint-skills/guest-access-reviewer.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 | $0.00000 | $0.01985 |
| Opus 5.5 | $0.00000 | $0.00794 |
| Sonnet 5.5 | $0.00000 | $0.00397 |
| Haiku 4.5 | $0.00000 | $0.00198 |
Grade A, and why
guest-access-reviewer 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 24d 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 — 189 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Guest Access Reviewer
Purpose
External collaborators accumulate on SharePoint sites over time — vendors, contractors, and clients who finished their engagement but were never removed. This skill enumerates every guest and external user who has access to the current SharePoint site, maps the groups and permission levels they hold, flags accounts that appear stale (no activity in 90+ days), and saves a self-contained HTML report that site owners and governance teams can act on. It is strictly read-only: it never removes users, modifies permissions, or changes any site content.
Trigger Phrases
Activate this skill when the user says any of the following (or close variations):
- "guest access review" / "guest access audit"
- "audit external users" / "external user audit"
- "who has guest access" / "which guests have access"
- "review external sharing" / "external access review"
- "find stale guests" / "stale external users"
- "who are the external collaborators on this site"
- "check guest accounts"
Inputs & Scope
Determine the scope from the user's request:
- Current site (default) — audit all guest users who have access to the current SharePoint site through any mechanism: SharePoint groups, direct role assignments, or sharing links.
- Named site — if the user names a specific site, resolve that site and audit it instead.
If no scope can be resolved, default to the current site and note that assumption in the report. Do not scan multiple sites unless the user explicitly asks.
What counts as a guest or external user
Identify the following as guest or external users:
- Accounts whose User Principal Name (UPN) contains
#EXT#— the standard Azure AD guest account marker - Accounts in the
_spo_guest account format used by SharePoint sharing - Accounts with an email domain that differs from the host organization's primary domain(s) when this can be determined from context
- Users explicitly shown as "Guest" in SharePoint user information
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.
- 24d ago First seen · 189 lines · 0 tokens per session scan A 1f9042be6f9f
guest-access-reviewer is a skill published in the GitHub repository pnp/sharepoint-skills (137 stars, last pushed yesterday), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 1,985 tokens. 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 2026-09-23.
Other skills, from other repositories
html-ppt-hermes-cyber-terminal
OpenDesign + BYOK: choosing and wiring your own model, hands-on — cost, quality, and the routing decision. Built as a decision-grade AI literacy deck for engineers, IT, applied-AI teams.
skill-doc-delivery
Convert markdown to DOCX, PPTX, XLSX, PDF office documents — use when you need exportable deliverables.
skill-writing-plans
Create zero-context implementation plans with bite-sized tasks — use for multi-step feature planning.
go-testing
Trigger: Go tests, go test coverage, Bubbletea teatest, golden files. Apply focused Go testing patterns.
bf-to-agents-sdk-dotnet-migration
Use when migrating a Bot Framework .NET SDK bot to Microsoft 365 Agents SDK. Triggered by projects that depend on packages: Microsoft.Bot.Builder or Microsoft.Bot.Builder.Integration.AspNet.Core that want to migrate to Agents SDK.
threejs-textures
Three.js textures - texture types, UV mapping, environment maps, texture settings. Use when working with images, UV coordinates, cubemaps, HDR environments, or texture optimization.