inspect-skills

inspect-skills is a skill for Claude Code, Codex from yu-iskw/skill-inspector. It costs 36 tokens per session (446 once invoked), scanned A, original, Apache-2.0.

A tool for checking Agent Skills for quality, security, specification compliance, and compatibility with different providers. It uses the skill-inspector command-line tool.

In plain words
What is it for?
Use it to list skills, inspect a skill folder or repository, and receive a score with findings about security and compliance.
Why use it?
A skill may contain unsafe instructions, fail to follow the expected format, or work only with certain providers. Inspection helps reveal these issues before the skill is used.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to list skills, inspect a skill folder or repository, and receive a score with findings about security and compliance.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/yu-iskw/skill-inspector/inspect-skills
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 yu-iskw/skill-inspector --skill inspect-skills
Clone the repo
git clone --depth 1 https://github.com/yu-iskw/skill-inspector

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 inspect-skills

README.md
[![agentmods](https://agentmods.dev/badge/skills/yu-iskw/skill-inspector/inspect-skills/github.svg)](https://agentmods.dev/skills/yu-iskw/skill-inspector/inspect-skills)
Your own site
<a href="https://agentmods.dev/skills/yu-iskw/skill-inspector/inspect-skills"><img src="https://agentmods.dev/badge/skills/yu-iskw/skill-inspector/inspect-skills/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 inspect-skills

Your own site · 80×15
<a href="https://agentmods.dev/skills/yu-iskw/skill-inspector/inspect-skills"><img src="https://agentmods.dev/badge/skills/yu-iskw/skill-inspector/inspect-skills.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 36 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 446 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 $0.00036 $0.00446
Opus 5 $0.00018 $0.00223
Sonnet 5 $0.00007 $0.00089
Haiku 4.5 $0.00004 $0.00045

Measured 10d ago against content hash cc187f069660, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

inspect-skills 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.

The scan reads SKILL.md. This mod also ships 2 executable files (scripts/inspect.sh, scripts/list-skills.sh), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

skills/inspect-skills/SKILL.md · 46 lines

What it actually says

Inspect Agent Skills

Purpose

Run the skill-inspector CLI to analyze one or more Agent Skills for spec compliance, security (e.g. RCE, data exfiltration), and provider compatibility. Use this skill when you need to validate, audit, or harden Agent Skills.

When to Use

  • The user asks to "inspect skills", "validate skills", "audit skills for security", or "check skill compliance".
  • You need to verify a skill directory or repo before adopting or recommending it.
  • You want a 0–100 score and actionable findings for a skill or skill set.

How to Use

  1. List skills only (no LLM required): From the repo or directory that contains skills, run:

    ./scripts/list-skills.sh [source]
    

    Example: ./scripts/list-skills.sh . or ./scripts/list-skills.sh owner/repo.

  2. Full inspection (requires at least one LLM API key): Run:

    ./scripts/inspect.sh [source] [options]
    

    The script checks for ANTHROPIC_API_KEY, OPENAI_API_KEY, GOOGLE_API_KEY, MISTRAL_API_KEY, or GROQ_API_KEY and exits with a clear error if none are set.

    Examples:

    • ./scripts/inspect.sh . — inspect all skills in current directory
    • ./scripts/inspect.sh ./my-skill --provider anthropic
    • ./scripts/inspect.sh owner/repo -s "skill-name" --json
  3. Interpret results: See references/cli-usage.md for score ranges, severity levels, and --json output.

Resources

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 · 46 lines · 36 tokens per session scan A cc187f069660

Subscribe to this mod's changes

inspect-skills is a skill published in the GitHub repository yu-iskw/skill-inspector (2 stars, last pushed 10d ago), licensed Apache-2.0. It adds 36 tokens to every session and 446 once invoked, about $0.0002 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 2026-08-31.

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