solo-skill-audit

solo-skill-audit is a skill for Claude Code from fortunto2/solo-factory. It costs 57 tokens per session (1,458 once invoked), scanned A, a copy of solo-skill-audit, MIT.

A quality-audit workflow for checking whether an agent skill follows best practices and its required checklist.

In plain words
What is it for?
Use it to review a skill, check its quality, or produce a skill score.
Why use it?
It helps reveal weaknesses in a skill before relying on it in an agent workflow.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: reads .claude/ paths; names the AskUserQuestion tool; mentions Claude Code.

Part of the solo plugin — 45 skills, 2 commands, 3 agents, 3 hooks shipped together

Good fit Use it to review a skill, check its quality, or produce a skill score.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/fortunto2/solo-factory/skill-audit
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.

Any agent
npx skills add fortunto2/solo-factory --skill skill-audit
Clone the repo
git clone --depth 1 https://github.com/fortunto2/solo-factory

Made for: Claude Code.

Or install solo, the plugin that ships this one along with the rest of its 45 skills, 2 commands, 3 agents, 3 hooks.

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 solo-skill-audit

README.md
[![agentmods](https://agentmods.dev/badge/skills/fortunto2/solo-factory/skill-audit/github.svg)](https://agentmods.dev/skills/fortunto2/solo-factory/skill-audit)
Your own site
<a href="https://agentmods.dev/skills/fortunto2/solo-factory/skill-audit"><img src="https://agentmods.dev/badge/skills/fortunto2/solo-factory/skill-audit/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.

agentmods 80×15 button for solo-skill-audit

Your own site · 80×15
<a href="https://agentmods.dev/skills/fortunto2/solo-factory/skill-audit"><img src="https://agentmods.dev/badge/skills/fortunto2/solo-factory/skill-audit.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 57 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,458 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 91% 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 5.1 $0.00057 $0.01458
Opus 5 $0.00028 $0.00729
Sonnet 5 $0.00011 $0.00292
Haiku 4.5 $0.00006 $0.00146

Measured 10d ago against content hash 0e0eee7e8e85, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

solo-skill-audit 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 10d 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

91% identical to solo-skill-audit — 23 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.

skills/skill-audit/SKILL.md · 116 lines

How it starts

The opening of the file, as written. The whole thing — 116 lines — stays where its author put it; the contents beside it link to each section on GitHub.

/skill-audit

Audit a skill against the quality checklist based on Anthropic's internal best practices for Claude Code skills. Reads the skill's SKILL.md, references/, scripts/, and evaluates across 12 dimensions.

Source: https://x.com/trq212/status/2033949937936085378

Checklist Reference

  • Scoring rubric, 12 dimensions: references/checklist.md
  • The levers the scores measure — invocation, information hierarchy, leading words, failure modes: references/writing-skills.md
  • Term definitions used in findings: references/skills-glossary.md

Steps

  1. Locate skill from $ARGUMENTS:

    • If name: search skills/{name}/SKILL.md in current project, then ~/.claude/plugins/**/skills/{name}/SKILL.md
    • If path: read directly
    • If empty: list available skills via Glob **/skills/*/SKILL.md, ask via AskUserQuestion
  2. Read skill contents (parallel):

    • SKILL.md — main skill file
    • references/* — all reference files (if dir exists)
    • scripts/* — all scripts (if dir exists)
    • assets/* — all assets (if dir exists)
    • Count total lines of SKILL.md
  3. Read checklist from references/checklist.md

  4. Evaluate each dimension — for every checklist item, assess based on what you read:

    For each of the 12 dimensions:

    • State what you found (evidence)
    • Score 0, 1, or 2 (use rubric from checklist)
    • If score < 2: give one specific fix
  5. Determine category — classify skill into one of 9 types from checklist. Flag if it straddles multiple.

  6. Failure-mode pass — read references/writing-skills.md, then check the skill for each named failure mode. Quote the offending line for every hit; a hit with no quote is a guess:

    • No-op — a line the model already obeys by default. Test each sentence in isolation: does it change behaviour versus the default?
    • Duplication — one meaning stated in more than one place.
    • Sediment — stale lines describing behaviour, paths, or tools that no longer exist.
    • Sprawl — long even after no-ops and duplication are removed; cure is disclosure into references/, not deletion.
    • Negation — steering by prohibition where a positive target would work. Don't use X names X; use Y doesn't.
    • Premature completion — a step whose completion criterion can't distinguish done from not-done.
    • Weak leading word — a description or body leaning on generic words instead of a compact pretrained concept the user actually types.

Read the full file on GitHub · 116 lines

Files

What ships with it

3 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.

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. 10d ago First seen · 116 lines · 57 tokens per session scan A 0e0eee7e8e85

Subscribe to this mod's changes

solo-skill-audit is a skill published in the GitHub repository fortunto2/solo-factory (18 stars, last pushed today), licensed MIT. It adds 57 tokens to every session and 1,458 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. It is 91% identical to solo-skill-audit, differing in 23 lines, and is treated as a copy.