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 jordanhubbard/agentos --skill virtio-devicegit clone --depth 1 https://github.com/jordanhubbard/agentosWrote 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/jordanhubbard/agentos/virtio-device)<a href="https://agentmods.dev/skills/jordanhubbard/agentos/virtio-device"><img src="https://agentmods.dev/badge/skills/jordanhubbard/agentos/virtio-device/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/jordanhubbard/agentos/virtio-device"><img src="https://agentmods.dev/badge/skills/jordanhubbard/agentos/virtio-device.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00250 |
| Opus 5 | $0.00000 | $0.00125 |
| Sonnet 5 | $0.00000 | $0.00050 |
| Haiku 4.5 | $0.00000 | $0.00025 |
Grade A, and why
virtio-device 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 today.
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.
What it actually says
virtio device (guest-facing)
The VMM emulates virtio-mmio (or virtio-pci) for guests using libvmm
virtio_mmio_*_init. That is a different virtio world from QEMU's host
virtio-mmio, which is a physical device for a driver PD.
Invariants
- Guest IPA for emulated net is
AOS_VIRTIO_NET_GUEST_IPA(0x0A010000). - That IPA must fault into the VMM. It must not be identity-mapped host MMIO.
- Backend is sDDF queues (
aos_net_virt_pumpuntil a nic_drv exists). - QEMU buses at
0x0A000000are a kill-dated crutch.
Forbidden
virq_registerof a host INTID as the I/O path for a class that has an emulated virtio device.- Guest DTB pointing only at QEMU virtio-mmio for that class.
Helper
Run make test-host; the platform guest-path tests validate the effective
device-tree inputs and reject host-device passthrough.
What ships with it
1 file 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.
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.
- today Changed · -1 lines 994549709250
- 6d ago First seen · 25 lines · 0 tokens per session scan A e513dbd3a7c2
virtio-device is a skill published in the GitHub repository jordanhubbard/agentos (30 stars, last pushed today), licensed BSD-2-Clause. It costs nothing until one of its globs matches a file; then it loads 250 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 2026-09-04.
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