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/vercel/vercel-plugin/vercel-sandboxnpx skills add vercel/vercel-plugin --skill vercel-sandboxgit clone --depth 1 https://github.com/vercel/vercel-pluginWhat 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 | $0.00046 | $0.03070 |
| Opus 5 | $0.00023 | $0.01535 |
| Sonnet 5 | $0.00009 | $0.00614 |
| Haiku 4.5 | $0.00005 | $0.00307 |
Grade B, and why
vercel-sandbox scanned grade B 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.
Asks for rootmediumPrivilege escalation
A mod that escalates privileges can change anything on the machine, not only the project.
`sudo dnf clean all 2>&1 && sudo dnf install -y --skip-broken ${CHROMIUM_SYSTEM_DEPS.join(" ")} 2>&1 && sudo ldconfig 2>&1`, Runs shell commandslowCapability
Expected in a hook, worth knowing in a rule or an instructions file.
pattern: 'child_process.*exec\(|execSync\(|spawn\(.*\{.*shell:\s*true' The source is not reproduced here
No licence file
A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.
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.
- 3d ago First seen · 370 lines · 46 tokens per session scan B e3cffe7c48b7
vercel-sandbox is a skill published in the GitHub repository vercel/vercel-plugin (270 stars, last pushed 4d ago), with no licence file. It adds 46 tokens to every session and 3,070 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it B with 2 findings (asks for root, runs shell commands). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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