test-vm

test-vm is a skill for Claude Code, Codex from the-void-ia/void-box. It costs 26 tokens per session (1,527 once invoked), scanned C, original, Apache-2.0.

A small smoke test for a VoidBox virtual machine, an isolated computer environment used to run software safely. It checks that the machine starts and that a language model can answer a simple prompt.

In plain words
What is it for?
Use it to boot-test VoidBox locally and confirm that an Ollama or Claude-backed model responds as expected.
Why use it?
It provides a quick check that the VM and its model connection work before running more involved tasks.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/the-void-ia/void-box/test-vm
Any agent
npx skills add the-void-ia/void-box --skill test-vm
Clone the repo
git clone --depth 1 https://github.com/the-void-ia/void-box

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.

agentmods badge for test-vm

README.md
[![agentmods](https://agentmods.dev/badge/skills/the-void-ia/void-box/test-vm.svg)](https://agentmods.dev/skills/the-void-ia/void-box/test-vm)
Your own site
<a href="https://agentmods.dev/skills/the-void-ia/void-box/test-vm"><img src="https://agentmods.dev/badge/skills/the-void-ia/void-box/test-vm.svg" alt="Measured on agentmods" height="20"></a>
Per session 26 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,527 The whole file, excluding the scripts and references it only reads on demand.
Security scan C 2 findings. Scan, not verified.
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 $0.00026 $0.01527
Opus 5 $0.00013 $0.00763
Sonnet 5 $0.00005 $0.00305
Haiku 4.5 $0.00003 $0.00153

Measured 3d ago against content hash fb047974eec2, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade C, and why

test-vm scanned grade C with 2 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.

Downloads and executes remote codehighSupply chain

curl | sh runs whatever the server returns today, which is not necessarily what it returned when this was reviewed.

If not installed: macOS → `brew install ollama`; Linux → `curl -fsSL https://ollama.com/install.sh | sh`. Stop until installed.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

If not installed: macOS → `brew install ollama`; Linux → `curl -fsSL https://ollama.com/install.sh | sh`. Stop until installed.
.claude/skills/test-vm/SKILL.md · 174 lines

How it starts

The opening of the file, as written. The whole thing — 174 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Runs examples/smoke/smoke.yaml — the agent replies with "vm-ok 2+2=4". No tool use required; any model that generates text will pass. Success is success: true with output containing vm-ok.

All commands run from the repository root.

Usage: /test-vm [ollama [model] | claude | claude-personal]

  • ollama [model] — local Ollama (default model: phi4-mini)
  • claude — Anthropic API key (ANTHROPIC_API_KEY must be set)
  • claude-personal — personal Claude account (macOS: extracted from Keychain; Linux: staged from ~/.claude/)
  • no argument — defaults to ollama phi4-mini

Recommended Ollama models (2–4 GB RAM, reliable with claude-code): phi4-mini, gemma3:4b, llama3.2:3b. Avoid *-coder variants — they don't follow the agentic protocol well.


Step 1 — Prerequisites

Kernel

Check for an existing kernel file. macOS needs an uncompressed kernel (vmlinux-*); Linux can use the host kernel (vmlinuz-*):

ls target/vmlinux-arm64 2>/dev/null \
  || ls target/vmlinux-amd64 2>/dev/null \
  || ls /boot/vmlinuz-$(uname -r) 2>/dev/null \
  || echo "MISSING"

If missing, download it (the script caches the result in target/):

scripts/download_kernel.sh

After downloading, run the check again to confirm and record the path — it is needed in Step 4.

Rootfs

ls target/void-box-rootfs.cpio.gz 2>/dev/null || echo "MISSING"

If missing, build it (auto-detects the claude binary on PATH or ~/.local/bin/claude):

scripts/build_claude_rootfs.sh

Run the check again to confirm. If it still fails, tell the user to set CLAUDE_BIN=/path/to/claude and retry.


Step 2 — Build and sign

cargo build --release --bin voidbox

macOS only — Apple Virtualization.framework requires the entitlement:

codesign --force --sign - --entitlements voidbox.entitlements target/release/voidbox

Step 3 — Provider setup

Ollama

Check Ollama is installed:

which ollama || echo "NOT INSTALLED"

Read the full file on GitHub · 174 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. 3d ago First seen · 174 lines · 26 tokens per session scan C fb047974eec2

Subscribe to this mod's changes

test-vm is a skill published in the GitHub repository the-void-ia/void-box (88 stars, last pushed 6d ago), licensed Apache-2.0. It adds 26 tokens to every session and 1,527 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it C with 2 findings (downloads and executes remote code, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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