vet-skill

vet-skill is a command for Claude Code from 8NobleTruths/sabba. It costs 14 tokens per session (117 once invoked), scanned A, original, Apache-2.0.

A safety-check command for inspecting a coding-agent skill or plugin before it is installed. It observes the item in a sandbox and reports actions such as reading credential-like files, using the network, or starting subprocesses.

In plain words
What is it for?
Use it to assess an installation path, review observed behaviour, and decide whether a skill or plugin is clean, suspicious, or dangerous.
Why use it?
It helps you understand what an add-on actually does before granting it a place in your development environment.

Command for Claude Code

Written for Claude Code: $ARGUMENTS substitution.

Good fit Use it to assess an installation path, review observed behaviour, and decide whether a skill or plugin is clean, suspicious, or dangerous.

Compare 6 commands from other repositories ↓
Install with agentmods
npx agentmods add commands/8nobletruths/sabba/vet-skill
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.

Clone the repo
git clone --depth 1 https://github.com/8NobleTruths/sabba

Made for: Claude Code.

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 vet-skill

README.md
[![agentmods](https://agentmods.dev/badge/commands/8nobletruths/sabba/vet-skill.svg)](https://agentmods.dev/commands/8nobletruths/sabba/vet-skill)
Your own site
<a href="https://agentmods.dev/commands/8nobletruths/sabba/vet-skill"><img src="https://agentmods.dev/badge/commands/8nobletruths/sabba/vet-skill.svg" alt="Measured on agentmods" height="20"></a>
Per session 14 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 117 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.00014 $0.00117
Opus 5 $0.00007 $0.00059
Sonnet 5 $0.00003 $0.00023
Haiku 4.5 $0.00001 $0.00012

Measured 8d ago against content hash 039c6c43027c, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

vet-skill 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 8d 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.

sabba/templates/commands/vet-skill.md · 12 lines

What it actually says

Before installing the skill or plugin at $ARGUMENTS, vet it.

Call sabba security_scan on that path. It runs the skill in a sandboxed home and cwd and reports exactly what it did: credential-looking file reads, outbound network, subprocesses.

Report the risk level (clean / suspicious / dangerous) and the observed behaviors. Do not install a skill that reads credentials or opens the network unless you understand and accept exactly why it does so.

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. 8d ago First seen · 12 lines · 14 tokens per session scan A 039c6c43027c

Subscribe to this mod's changes

vet-skill is a command published in the GitHub repository 8NobleTruths/sabba (11 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 14 tokens to every session and 117 once invoked, about $0.0001 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 2026-08-30.