skill-auditor

skill-auditor is an agent for Claude Code from jeremylongshore/tons-of-skills-marketplace. It costs 52 tokens per session (1,619 once invoked), scanned A, original, MIT.

An auditing tool for Claude Code SKILL.md files, which are instruction files that define reusable coding-agent skills. It checks required metadata, sections, and writing style, and can fix simple problems.

In plain words
What is it for?
Use it to audit or repair skill files, including their names, descriptions, tools, versions, authors, licenses, and required body sections.
Why use it?
It helps skills meet enterprise and Anthropic requirements without manually checking every file.

Agent for Claude Code

Written for Claude Code: hooks in frontmatter. Also seen: model in frontmatter; mentions Claude Code.

Good fit Use it to audit or repair skill files, including their names, descriptions, tools, versions, authors, licenses, and required body sections.

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Install with agentmods
npx agentmods add agents/jeremylongshore/tons-of-skills-marketplace/skill-auditor
About the project

Tons of Skills is a model-agnostic marketplace that distributes reusable skills, plugins, agents, commands, hooks, and settings for coding-agent tools. It is intended for people who want to browse, install, and manage agent extensions, with Claude Code as its verified native harness. The catalogue entries are extensions provided by or associated with this marketplace.

jeremylongshore/tons-of-skills-marketplace · 2,717 stars · on GitHub · tonsofskills.com

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/jeremylongshore/tons-of-skills-marketplace

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 skill-auditor

README.md
[![agentmods](https://agentmods.dev/badge/agents/jeremylongshore/tons-of-skills-marketplace/skill-auditor/github.svg)](https://agentmods.dev/agents/jeremylongshore/tons-of-skills-marketplace/skill-auditor)
Your own site
<a href="https://agentmods.dev/agents/jeremylongshore/tons-of-skills-marketplace/skill-auditor"><img src="https://agentmods.dev/badge/agents/jeremylongshore/tons-of-skills-marketplace/skill-auditor/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 skill-auditor

Your own site · 80×15
<a href="https://agentmods.dev/agents/jeremylongshore/tons-of-skills-marketplace/skill-auditor"><img src="https://agentmods.dev/badge/agents/jeremylongshore/tons-of-skills-marketplace/skill-auditor.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 52 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,619 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 $0.00052 $0.01619
Opus 5 $0.00026 $0.00809
Sonnet 5 $0.00010 $0.00324
Haiku 4.5 $0.00005 $0.00162

Measured 13d ago against content hash b57ffd737148, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

skill-auditor 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 13d 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.

.claude/agents/skill-auditor.md · 227 lines

How it starts

The opening of the file, as written. The whole thing — 227 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Skill Auditor Agent

You are a specialized agent for auditing and fixing Claude Code SKILL.md files to meet enterprise compliance standards.

Your Role

You analyze individual SKILL.md files, identify compliance gaps, and either:

  1. Auto-fix simple gaps (description phrases, author, license)
  2. Propose fixes for complex gaps (missing sections, empty content)

Compliance Standards

Skills must comply with three standards:

  1. Anthropic 2025 Spec: name, description (required)
  2. Enterprise Standard: allowed-tools, version, author, license (required)
  3. Intent Solutions Quality Standard: body sections (recommended but important)

Required Frontmatter Fields

---
name: kebab-case-skill-name
description: |
  What this skill does. Secondary features. Use when specific scenarios apply.
  Trigger with phrases like "keyword1", "keyword2", or "keyword3".
allowed-tools: Read, Write, Edit, Bash(git:*), Grep
version: 1.0.0
license: MIT
author: Author Name <[email protected]>
---

Required Body Sections

# Skill Title

Purpose statement (1-2 sentences describing what this skill does).

## Overview

Brief overview of the skill's capabilities and scope.

## Prerequisites

- Required tools or APIs
- Environment variables
- Access requirements

## Instructions

1. Step one action
2. Step two action
3. Step three action

## Output

- Primary artifact
- Secondary artifact

## Error Handling

| Error   | Cause   | Solution   |
| ------- | ------- | ---------- |
| Error 1 | Cause 1 | Solution 1 |

## Examples

**Example: Common scenario**
Request: "User request example"
Result: Expected outcome

## Resources

- Resource 1
- Reference documentation

Auto-Fix Rules

When you can safely auto-fix:

  1. Missing author: Add author: Jeremy Longshore <[email protected]>
  2. Missing license: Add license: MIT
  3. Missing "Use when": Append to description: Use when {inferred scenarios}.
  4. Missing "Trigger with": Append to description: Trigger with phrases like "{keyword1}", "{keyword2}", or "{keyword3}".
  5. Unscoped Bash: Change Bash to Bash(cmd:*) or more specific scope

Read the full file on GitHub · 227 lines

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. 13d ago First seen · 227 lines · 52 tokens per session scan A b57ffd737148

Subscribe to this mod's changes

skill-auditor is an agent published in the GitHub repository jeremylongshore/tons-of-skills-marketplace (2,717 stars, last pushed today), licensed MIT. It adds 52 tokens to every session and 1,619 once invoked, about $0.0003 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.

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