beta-skill

beta-skill is a skill for Claude Code, Codex from JustMichael-80/MasterVault. It costs 10 tokens per session (29 once invoked), scanned A, a copy of alpha-skill, MIT.

A test fixture used to check whether skills can be discovered and installed. It is explicitly marked as not being a real skill.

In plain words
What is it for?
Use it only in tests of skill installation or discovery.
Why use it?
It exists for installer testing, so developers can verify discovery behaviour without relying on a production add-on.

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/justmichael-80/mastervault/beta-skill
Any agent
npx skills add JustMichael-80/MasterVault --skill beta-skill
Clone the repo
git clone --depth 1 https://github.com/JustMichael-80/MasterVault

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 beta-skill

README.md
[![agentmods](https://agentmods.dev/badge/skills/justmichael-80/mastervault/beta-skill.svg)](https://agentmods.dev/skills/justmichael-80/mastervault/beta-skill)
Your own site
<a href="https://agentmods.dev/skills/justmichael-80/mastervault/beta-skill"><img src="https://agentmods.dev/badge/skills/justmichael-80/mastervault/beta-skill.svg" alt="Measured on agentmods" height="20"></a>
Per session 10 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 29 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 88% copy Near-identical to another mod 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 $0.00010 $0.00029
Opus 5 $0.00005 $0.00015
Sonnet 5 $0.00002 $0.00006
Haiku 4.5 $0.00001 $0.00003

Measured 4d ago against content hash 151d3055fe8d, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

beta-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 4d 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.

Origin

This is a copy

88% identical to alpha-skill — 2 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

tests/fixtures/dotfolder-repo/.claude/skills/beta-skill/SKILL.md · 6 lines

What it actually says

Fixture skill for installer discovery tests. Not a real skill.

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. 4d ago First seen · 6 lines · 10 tokens per session scan A 151d3055fe8d

Subscribe to this mod's changes

beta-skill is a skill published in the GitHub repository JustMichael-80/MasterVault (12 stars, last pushed 22d ago), licensed MIT. It adds 10 tokens to every session and 29 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 88% identical to alpha-skill, differing in 2 lines, and is treated as a copy.

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