Agent skill

Windows Vm Test

Run ad-hoc Nub tests and debugging probes in the maintainer's existing local Windows 11 ARM64 QEMU/HVF VM when its external disk and runbook are present.

MITAuto-check: warningsDevOps & Cloud

Install Windows Vm Test

The automated check flagged lines worth reading first. See the safety section below.

skills CLI

$ npx skills add nubjs/nub --skill windows-vm-test -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install nubjs/nub windows-vm-test --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/nubjs/nub.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/windows-vm-test .claude/skills/windows-vm-test && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "windows-vm-test" agent skill from https://github.com/nubjs/nub/tree/main/.claude/skills/windows-vm-test into .claude/skills/windows-vm-test/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "windows-vm-test", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/nubjs/nub/tree/main/.claude/skills/windows-vm-test

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add nubjs/nub --skill windows-vm-test -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install nubjs/nub windows-vm-test --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/nubjs/nub.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.claude/skills/windows-vm-test .agents/skills/windows-vm-test && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "windows-vm-test" agent skill from https://github.com/nubjs/nub/tree/main/.claude/skills/windows-vm-test into .agents/skills/windows-vm-test/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "windows-vm-test", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add nubjs/nub --skill windows-vm-test -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install nubjs/nub windows-vm-test --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/nubjs/nub.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.claude/skills/windows-vm-test .cursor/skills/windows-vm-test && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "windows-vm-test" agent skill from https://github.com/nubjs/nub/tree/main/.claude/skills/windows-vm-test into .cursor/skills/windows-vm-test/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "windows-vm-test", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/nubjs/nub.git --path .claude/skills/windows-vm-test

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add nubjs/nub --skill windows-vm-test -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install nubjs/nub windows-vm-test --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/nubjs/nub.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.claude/skills/windows-vm-test .gemini/skills/windows-vm-test && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "windows-vm-test" agent skill from https://github.com/nubjs/nub/tree/main/.claude/skills/windows-vm-test into .gemini/skills/windows-vm-test/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "windows-vm-test", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install nubjs/nub windows-vm-test

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add nubjs/nub --skill windows-vm-test -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/nubjs/nub.git skills-src && mkdir -p .github/skills && cp -r skills-src/.claude/skills/windows-vm-test .github/skills/windows-vm-test && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "windows-vm-test" agent skill from https://github.com/nubjs/nub/tree/main/.claude/skills/windows-vm-test into .github/skills/windows-vm-test/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "windows-vm-test", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add nubjs/nub --skill windows-vm-test -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install nubjs/nub windows-vm-test --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/nubjs/nub.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.claude/skills/windows-vm-test .opencode/skills/windows-vm-test && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "windows-vm-test" agent skill from https://github.com/nubjs/nub/tree/main/.claude/skills/windows-vm-test into .opencode/skills/windows-vm-test/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "windows-vm-test", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: windows-vm-test
GitHub stars: 4.4k
Token cost: ~1.1k tokens
SKILL.md length: 303 words
Files: 2
Skills in repo: 31
Repo updated: Oct 7, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

Run ad-hoc Nub tests and debugging probes in the maintainer's existing local Windows 11 ARM64 QEMU/HVF VM when its external disk and runbook are present.

Interactive win32-arm64
SKILL.md covers Fail-closed preflight, VM lifecycle, SSH readiness and Transfer and run a probe, plus 2 more sections
Calls ssh and scp
Windows-on-ARM x64-emulation checks

What it does

Windows Vm Test is an agent skill from nubjs/nub. Run ad-hoc Nub tests and debugging probes in the maintainer's existing local Windows 11 ARM64 QEMU/HVF VM when its external disk and runbook are present. Use for interactive win32-arm64 or Windows-on-ARM x64-emulation checks; use ci-adhoc-test for true x64-native behavior or when the local VM is unavailable.

Its SKILL.md is about 1.1k tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files (for example `agents/openai.yaml`).

It sits in DevOps & Cloud, covering Runbooks and postmortems. It works with Windows. The repository describes itself as: The fast all-in-one Node.js toolkit. The licence is MIT.

When your agent uses it

Interactive win32-arm64
Windows-on-ARM x64-emulation checks
Use ci-adhoc-test for true x64-native behavior
The local VM is unavailable

Example prompts

“/windows-vm-test”

What it can do on your machine

Read from SKILL.md and the folder at commit 568e73a. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
- ssh
- scp
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md. Its commands use ssh and scp, which can reach the network depending on how they are called.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Windows Vm Test loads about 1.1k tokens when it runs. Until then it costs about 81 tokens; SKILL.md has 303 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~81
When it runs · the whole SKILL.md, loaded when a task matches: ~1.1k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check: warnings

The automated check found patterns that need a careful read before installing.

WarningMentions a credentials file (SSH keys, cloud or package-manager tokens)SKILL.md:26
```
test -r "$HOME/.ssh/nub-winvm" || {
```
WarningMentions a credentials file (SSH keys, cloud or package-manager tokens)SKILL.md:60
```
-i "$HOME/.ssh/nub-winvm"
```
WarningMentions a credentials file (SSH keys, cloud or package-manager tokens)SKILL.md:66
```
-i "$HOME/.ssh/nub-winvm"
```

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from nubjs/nub at commit 568e73a, republished under its MIT licence (© nubjs). 303 words, ~1,057 tokens.

Download SKILL.mdSave it as .claude/skills/windows-vm-test/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.

name: windows-vm-test
description: Run ad-hoc Nub tests and debugging probes in the maintainer's existing local Windows 11 ARM64 QEMU/HVF VM when its external disk and runbook are present. Use for interactive win32-arm64 or Windows-on-ARM x64-emulation checks; use ci-adhoc-test for true x64-native behavior or when the local VM is unavailable.
metadata.internal: true

Windows VM testing

Operate the existing VM; do not provision one. The known-good guest was Windows 11 ARM64 under QEMU/HVF at /Volumes/Plex/nub-winvm, with host port 2222 forwarded to guest SSH. The VM tests win32-arm64 natively and win32-x64 under emulation. True win32-x64-native behavior requires windows-latest through ci-adhoc-test.

Fail-closed preflight

Run read-only checks first:

VM_ROOT=/Volumes/Plex/nub-winvm
test -d "$VM_ROOT" || {
  echo 'Windows VM disk unavailable; use ci-adhoc-test or restore the external volume.' >&2
  exit 1
}
test -r "$HOME/.ssh/nub-winvm" || {
  echo 'Windows VM SSH key unavailable.' >&2
  exit 1
}
command -v qemu-system-aarch64 qemu-img >/dev/null || {
  echo 'QEMU tooling unavailable.' >&2
  exit 1
}
find "$VM_ROOT" -maxdepth 1 -type f -print
pgrep -alf 'qemu-system-aarch64|install-loop|win11' || true
lsof -nP -iTCP:2222 -sTCP:LISTEN || true

Stop if the disk, its runbook, or its own lifecycle helpers are absent. Do not mount a missing volume, reconstruct QEMU arguments, create a disk, or reprovision Windows as part of this skill.

VM lifecycle

Read the restored runbook and invoke its exact start, stop, and snapshot commands. Before launch, prove that no other QEMU process owns win11.qcow2. Never run competing QEMU or installer loops against one disk.

The historical clean-snapshot command is evidence, not a default action:

cd /Volumes/Plex/nub-winvm
qemu-img snapshot -c clean win11.qcow2

Create or apply a snapshot only while the VM state matches the restored runbook. Never guess a snapshot-restore sequence.

SSH readiness

Gate readiness on a guest command, not an open forwarded port:

SSH_OPTS=(
  -i "$HOME/.ssh/nub-winvm"
  -p 2222
  -o StrictHostKeyChecking=no
  -o UserKnownHostsFile=/dev/null
)
SCP_OPTS=(
  -i "$HOME/.ssh/nub-winvm"
  -P 2222
  -o StrictHostKeyChecking=no
  -o UserKnownHostsFile=/dev/null
)

ssh "${SSH_OPTS[@]}" nub@localhost \
  'powershell -NoProfile -Command "$PSVersionTable.OS; $env:PROCESSOR_ARCHITECTURE"'

Record the reported OS and architecture with every result.

Transfer and run a probe

Copy only the binary, script, and fixtures the probe needs into the remote user's home:

NUB_EXE=/absolute/path/to/nub.exe
test -f "$NUB_EXE"
file "$NUB_EXE"
shasum -a 256 "$NUB_EXE"

scp "${SCP_OPTS[@]}" "$NUB_EXE" nub@localhost:nub.exe
scp "${SCP_OPTS[@]}" ./probe.ps1 nub@localhost:probe.ps1
ssh "${SSH_OPTS[@]}" nub@localhost \
  'powershell -NoProfile -ExecutionPolicy Bypass -File "$HOME\probe.ps1"'

For a Rust failure, preserve the exit code while capturing a backtrace and log:

powershell

$ErrorActionPreference = 'Stop'
$env:RUST_BACKTRACE = 'full'
$env:RUST_LOG = 'debug'

& "$HOME\nub.exe" <args> *>&1 | Tee-Object "$HOME\nub-probe.log"
$code = $LASTEXITCODE
Write-Host "EXIT_CODE=$code"
exit $code

Use Get-Command nub -All, where.exe nub, Get-Item, and Get-Acl for resolution or filesystem diagnostics. Kill only processes created by the probe.

Run the Windows survey

After the runbook's clean-snapshot restore, copy and run tests/windows/papercut-survey.ps1:

powershell

& "$HOME\papercut-survey.ps1" `
  -NubBin "$HOME\nub.exe" `
  -WorkDir "$HOME\nub-papercut" `
  -OutputJson "$HOME\nub-papercut\results.json"
exit $LASTEXITCODE

Retrieve nub-papercut/results.json and any focused log before stopping or reverting the guest.

Evidence and CI boundary

Record the host commit, guest build/architecture, binary architecture, exact PowerShell invocation, exit status, stdout/stderr, and retrieved artifacts. The local ARM VM does not prove x64-native behavior and is not a clean hosted runner. Invoke ci-adhoc-test for a fresh Windows environment, x64-native behavior, unavailable local storage, or release-platform evidence.

Files

SKILL.md and 1 other file in .claude/skills/windows-vm-test of nubjs/nub.

SKILL.md
agents/openai.yaml

Open the folder on GitHubat commit 568e73a

Compare with similar skills

Windows Vm Test next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Windows Vm Test compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Windows Vm Test this skillnubjs/nub	4.4k	—	~1.1k	Automated safety check: Warn	MIT	yesterday
Trader Memory Coretradermonty/claude-trading-skills	3k	3 repos	~4.3k	Automated safety check: Pass	MIT	2 days ago
OpenRig Upgrade Proceduremvschwarz/openrig	5.9k	1 repos	~2.9k	Automated safety check: Pass	Apache-2.0	today
Author Migrationnrwl/nx	29k	—	~12k	Automated safety check: Notes	MIT	today
Write Notes Like Deepseekczm15053/write-notes-like-deepseek	484	—	~2k	Automated safety check: Pass	None	yesterday
GreptimeDB Release RunbookGreptimeTeam/greptimedb	6.7k	—	~1.4k	Automated safety check: Pass	Apache-2.0	today

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Questions about Windows Vm Test

What does Windows Vm Test do?

Run ad-hoc Nub tests and debugging probes in the maintainer's existing local Windows 11 ARM64 QEMU/HVF VM when its external disk and runbook are present. Windows Vm Test is an agent skill from nubjs/nub. Run ad-hoc Nub tests and debugging probes in the maintainer's existing local Windows 11 ARM64 QEMU/HVF VM when its external disk and runbook are present.

When should I use Windows Vm Test?

Windows Vm Test fits situations like: interactive win32-arm64; windows-on-ARM x64-emulation checks; use ci-adhoc-test for true x64-native behavior; the local VM is unavailable.

How do I install Windows Vm Test in Claude Code?

Run `npx skills add nubjs/nub --skill windows-vm-test -a claude-code`. Or copy the skill folder (.claude/skills/windows-vm-test in nubjs/nub) into .claude/skills/windows-vm-test in your project. Claude Code loads it when a task matches its description.

How do I install Windows Vm Test in Codex?

Run `npx skills add nubjs/nub --skill windows-vm-test -a codex`. Or copy the skill folder (.claude/skills/windows-vm-test in nubjs/nub) into .agents/skills/windows-vm-test in your project. Codex loads it when a task matches its description.

Can I use Windows Vm Test in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add nubjs/nub --skill windows-vm-test -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/windows-vm-test, .gemini/skills/windows-vm-test, .github/skills/windows-vm-test and .opencode/skills/windows-vm-test in your project.

What does Windows Vm Test need to run?

Going by SKILL.md and its folder, Windows Vm Test needs the command-line tools its instructions call (ssh and scp).

Does Windows Vm Test access the network?

SKILL.md contains no URLs. Its commands use ssh, which can reach the network depending on how they are called. This is read from the text; nothing was executed.

Is Windows Vm Test safe to install?

Our automated static check of SKILL.md flagged 3 warning(s): mentions a credentials file (ssh keys, cloud or package-manager tokens). Read the flagged lines before installing; the check is not a guarantee either way.

What licence does Windows Vm Test use?

Windows Vm Test is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Windows Vm Test use?

About 1.1k tokens (SKILL.md is roughly 4.2k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Windows Vm Test?

Skills that share tags, products or a category with Windows Vm Test: Trader Memory Core (tradermonty/claude-trading-skills, 3k stars), OpenRig Upgrade Procedure (mvschwarz/openrig, 5.9k stars), Author Migration (nrwl/nx, 29k stars) and Write Notes Like Deepseek (czm15053/write-notes-like-deepseek, 484 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Windows Vm Test?

nubjs (a GitHub organization) maintains it in nubjs/nub, which has 4,372 GitHub stars. The repository holds 31 skills in this directory. The repository was last updated on October 7, 2026.

Source: nubjs/nub on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Windows Vm Test

Install Windows Vm Test

Facts

At a glance

What it does

When your agent uses it

Example prompts

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Windows VM testing

Fail-closed preflight

VM lifecycle

SSH readiness

Transfer and run a probe

Run the Windows survey

Evidence and CI boundary

Files

Compare with similar skills

Similar skills

Trader Memory Core

OpenRig Upgrade Procedure

Author Migration

Write Notes Like Deepseek

GreptimeDB Release Runbook

Statem

More from nubjs/nub

Cpu Reduction

Disk Reduction

Nub Charts

Audit Thread

Linux Vm Test

Pm Perf Tracing

Questions about Windows Vm Test

Install Windows Vm Test

Facts

At a glance

What it does

When your agent uses it

Example prompts

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Windows VM testing

Fail-closed preflight

VM lifecycle

SSH readiness

Transfer and run a probe

Run the Windows survey

Evidence and CI boundary

Files

Compare with similar skills

Similar skills

More from nubjs/nub

Related

Questions about Windows Vm Test