What is windows-expert?

A guide for safely managing Windows settings, user accounts, registry entries, and JSON or archive data.

Use it for Windows registry hardening, account and group management, and controlled editing of structured files.

It reduces the risk of damaging system settings by requiring backups or checks before sensitive changes.

windows-expert — Skill for Claude Code and Codex by sandraschi

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 sandraschi/windows-operations-mcp --skill windows-expert

Clone the repo

git clone --depth 1 https://github.com/sandraschi/windows-operations-mcp

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/sandraschi/windows-operations-mcp/windows-expert/github.svg)](https://agentmods.dev/skills/sandraschi/windows-operations-mcp/windows-expert)

Your own site

<a href="https://agentmods.dev/skills/sandraschi/windows-operations-mcp/windows-expert"><img src="https://agentmods.dev/badge/skills/sandraschi/windows-operations-mcp/windows-expert/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/sandraschi/windows-operations-mcp/windows-expert"><img src="https://agentmods.dev/badge/skills/sandraschi/windows-operations-mcp/windows-expert.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 706 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	$0.00000	$0.00706
Opus 5.5	$0.00000	$0.00282
Sonnet 5.5	$0.00000	$0.00141
Haiku 4.5	$0.00000	$0.00071

Measured 2mo ago against content hash 555a4c40a886, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

windows-expert 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 2mo 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.

skills/windows-expert/SKILL.md · 61 lines

How it starts

The opening of the file, as written. The whole thing — 61 lines — stays where its author put it; the contents beside it link to each section on GitHub.

🛠️ Skill: Windows Native Hardening & Data Surgery

Name: windows-expert

Description: Expert in Windows-native orchestration, registry hardening, account management, and high-fidelity JSON/Archive surgery.

📖 Overview

This skill provides the operational logic and safe-mode patterns for managing Windows systems at an industrial grade. It prioritizes system integrity via "Safe Mode" registry operations and "Lean SOTA" data manipulation.

🛠️ Tool Interaction Patterns

1. Registry Hardening (`windows_registry`)

Pattern: Always perform a read/export before a write.
Safe Mode: The safe_mode=True parameter (default) automatically exports the target key to backups/registry/ before any destructive action.
Hardening Example:
- Action: delete
- Key: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\UnwantedApp
- Result: Auto-backup created.

2. Local Account Management (`windows_accounts`)

Pattern: List users before adding or modifying passwords.
Groups: Use manage_group to enforce the Principle of Least Privilege (PoLP).
Audit: Run get_group_members on the "Administrators" group to identify SID-based privilege creep.

3. Networking & Perimeter (`windows_network`)

Firewall: Use firewall_list before adding new rules.
Diagnostics: Always flush_dns as a first step in network-related agentic troubleshooting.

4. Environment Surgery (`windows_environment`)

Persistence: Distinguish between User and System scopes.
Synchronization: Always trigger a broadcast after modifications to ensure running processes adopt the new environment map.

🛰️ Agentic Workflows (FastMCP 3.2+)

⚡ Thinking Pattern: Autonomous Hardening

Inventory: Run windows_automation(action="wmi_query", wmi_class="Win32_OperatingSystem") to identify the environment.
Audit: Run windows_accounts(action="list_users") or windows_services(action="list").
Diagnostic Sampling: Use SEP-1577 Sampling (ctx.sample()) with a 'Reasoning' prompt to identify vulnerabilities in the inventory.
Remediation: Use windows_registry or windows_services to apply changes.
Verification: Re-audit and log the results using json_operations(action="write") to a status report.

Read the full file on GitHub · 61 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.

2mo ago First seen · 61 lines · 0 tokens per session scan A 555a4c40a886

Subscribe to this mod's changes

windows-expert is a skill published in the GitHub repository sandraschi/windows-operations-mcp (6 stars, last pushed 9d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 706 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 2026-08-31.

Python automation fastmcp mcp system windows

windows-expert next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
windows-expertsandraschi/windows-operations-mcp	Skill	6	9d ago	MIT	A	0	Claude Code, Codex
analyzing-windows-prefetch-with-python26zl/cybersec-toolkit	Skill	90	5d ago	MIT	A	43	Claude Code
analyzing-windows-prefetch-with-pythonoyi77/1ai-skills	Skill	17	today	MIT	A	56	Claude Code
gurume-clinarumiruna/gurume	Skill	13	9d ago	MIT	A	127	Claude Code, Codex
nulcleanerellmos-ai/skills	Skill	9	yesterday	MIT	A	37	Claude Code, Codex
encoding-fixellmos-ai/skills	Skill	9	yesterday	MIT	A	47	Claude Code, Codex
swagjmagar/swag-mcp	Skill	7	5d ago	MIT	A	118	Claude Code