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 agentmods add skills/razinaleksandr/vastkit/vastkitnpx skills add RazinAleksandr/vastkit --skill vastkitgit clone --depth 1 https://github.com/RazinAleksandr/vastkitWrote 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/razinaleksandr/vastkit/vastkit)<a href="https://agentmods.dev/skills/razinaleksandr/vastkit/vastkit"><img src="https://agentmods.dev/badge/skills/razinaleksandr/vastkit/vastkit.svg" alt="Measured on agentmods" 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 | $0.00103 | $0.01801 |
| Opus 5 | $0.00051 | $0.00901 |
| Sonnet 5 | $0.00021 | $0.00360 |
| Haiku 4.5 | $0.00010 | $0.00180 |
Grade A, and why
vastkit 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 5d 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 — 204 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Vastkit
Use the Vastkit runtime bundled with this plugin as the execution layer. Apply the workflow and guardrails below; do not install a separate Vastkit package or recreate Vast.ai API requests in ad hoc scripts.
Resolve the CLI
Resolve <skill-dir> to the directory containing this SKILL.md. In Claude
Code, ${CLAUDE_SKILL_DIR} is that directory. In other agents, use the skill
path shown by the host.
VK="<skill-dir>/scripts/vastkit-cli"
"$VK" --version
The launcher resolves the Python package from the installed plugin. If the
version check reports that the runtime is missing, stop and ask the user to
update or reinstall the plugin through their agent. Do not use pip as a
fallback.
Require Python 3.9+, internet access, ssh, and tar. Prefer rsync when
available; Vastkit falls back to tar transfers when the remote image lacks it.
Protect Credentials
- Use
VAST_API_KEYor~/.vast_api_key. Never put an API key in a command, pass--api-key, print it, commit it, or ask the user to paste it into chat. - Let Vastkit auto-detect an SSH key, or use
VASTKIT_SSH_KEY. Never print or transfer private keys. - Do not upload
.envfiles or credential directories. Vastkit excludes common environment files by default; add explicit exclusions for any project-specific secret paths. - Pass remote secrets only by referencing an already-exported local variable,
for example
--env HF_TOKEN="$HF_TOKEN". Never place a literal token in the command or response.
If authentication is not configured, stop and ask the user to configure it locally using the Vast.ai API key page. Continue only after they confirm.
Apply Spending Guardrails
Run read-only discovery commands without approval: whoami, search, ls,
status, jobs, and logs.
Before rent or start, obtain explicit user approval for the cost-bearing
action. A prior request counts only when it clearly authorizes renting or
resuming. State:
- GPU and minimum VRAM
- maximum hourly price
- disk allocation and image
- expected duration and download volume
- estimated session cost and any known excluded costs
- instance label
- whether to destroy automatically after verified output retrieval
What ships with it
2 files 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.
- 5d ago First seen · 204 lines · 103 tokens per session scan A d4d0365b3060
vastkit is a skill published in the GitHub repository RazinAleksandr/vastkit (3 stars, last pushed 1mo ago), licensed MIT. It adds 103 tokens to every session and 1,801 once invoked, about $0.0005 per session on Opus 5. 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.
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