check-my-skills

check-my-skills is a skill for Claude Code from tonyfadel23/skill-inspector. It costs 114 tokens per session (2,043 once invoked), scanned A, original, MIT.

A skill inspector that reads project skills and maps how their instructions flow into one another. It can show this as a directed graph, where arrows represent instruction relationships, and identify quality issues.

In plain words
What is it for?
Use it to audit skills, debug instruction behavior, inspect the skill graph, or scan every skill in a project.
Why use it?
It helps explain what SKILL.md files actually cause an agent to do, especially when instructions are long or interact in unexpected ways.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: mentions Claude Code.

Part of the check-my-skills plugin — 3 skills shipped together

Good fit Use it to audit skills, debug instruction behavior, inspect the skill graph, or scan every skill in a project.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/tonyfadel23/skill-inspector/check-my-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 tonyfadel23/skill-inspector --skill check-my-skills
Clone the repo
git clone --depth 1 https://github.com/tonyfadel23/skill-inspector

Made for: Claude Code.

Or install check-my-skills, the plugin that ships this one along with the rest of its 3 skills.

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 check-my-skills

README.md
[![agentmods](https://agentmods.dev/badge/skills/tonyfadel23/skill-inspector/check-my-skills/github.svg)](https://agentmods.dev/skills/tonyfadel23/skill-inspector/check-my-skills)
Your own site
<a href="https://agentmods.dev/skills/tonyfadel23/skill-inspector/check-my-skills"><img src="https://agentmods.dev/badge/skills/tonyfadel23/skill-inspector/check-my-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 check-my-skills

Your own site · 80×15
<a href="https://agentmods.dev/skills/tonyfadel23/skill-inspector/check-my-skills"><img src="https://agentmods.dev/badge/skills/tonyfadel23/skill-inspector/check-my-skills.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 114 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,043 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 $0.00114 $0.02043
Opus 5 $0.00057 $0.01022
Sonnet 5 $0.00023 $0.00409
Haiku 4.5 $0.00011 $0.00204

Measured 12d ago against content hash f6e1b357a585, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

check-my-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 12d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/build_report.py), 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/check-my-skills/SKILL.md · 249 lines

How it starts

The opening of the file, as written. The whole thing — 249 lines — stays where its author put it; the contents beside it link to each section on GitHub.

check-my-skills — Skill Instruction Inspector

Purpose

Parse every skill in a project into a directed acyclic graph (DAG) of instruction nodes, visualize the flow as an interactive Dagre tree, and surface quality issues in the instruction chain. Two modes:

  • Advanced (default): LLM-powered parsing via Anthropic API — deeper, catches nuance
  • Standard (--easy): Heuristic parsing — fast, no API calls, works offline

Step 0 — Setup

Detect Mode

Check the user's request for --easy or easy flag.

  • If present → set MODE=standard
  • If absent → set MODE=advance

Locate Skill Directory

Find where this skill's supporting files are installed:

SKILL_DIR=$(find "$(pwd)" ~/.agents/skills -path '*/check-my-skills/SKILL.md' -type f 2>/dev/null -exec dirname {} \; | head -1)

Ensure Dependencies

python3 -c "import yaml" 2>/dev/null || pip3 install --user "PyYAML>=6.0"
python3 -c "import anthropic" 2>/dev/null || pip3 install --user "anthropic>=0.25.0"

If the Anthropic SDK install fails or ANTHROPIC_API_KEY is not set, fall back to standard mode automatically and inform the user. Or the user can explicitly use --easy to skip the API entirely.


Step 1 — Discovery

Scan for all skill directories. Search these locations in order:

# Project skills (current working directory)
find "$(pwd)" -name "SKILL.md" -path "*/skills/*" -type f 2>/dev/null

# User-level skills
find ~/.agents/skills -name "SKILL.md" -type f 2>/dev/null

# Also check if user specified a specific path
# e.g., "check my skills in /path/to/project"

For each SKILL.md found, read the file and extract:

  • name (from YAML frontmatter)
  • description (from YAML frontmatter)
  • path (absolute path)
  • compatibility / mcp_servers (from frontmatter if present)
  • List of referenced files (e.g., references/examples.md, other skills mentioned)

Present the inventory to the user:

Found N skills:
1. product-brief (/mnt/skills/user/product-brief/SKILL.md)
2. prototype-prd (/mnt/skills/user/prototype-prd/SKILL.md)
...

Read the full file on GitHub · 249 lines

Files

What ships with it

4 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. 12d ago First seen · 249 lines · 114 tokens per session scan A f6e1b357a585

Subscribe to this mod's changes

check-my-skills is a skill published in the GitHub repository tonyfadel23/skill-inspector (2 stars, last pushed 5mo ago), licensed MIT. It adds 114 tokens to every session and 2,043 once invoked, about $0.0006 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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