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.
npx skills add tonyfadel23/skill-inspector --skill check-my-skillsgit clone --depth 1 https://github.com/tonyfadel23/skill-inspectorWrote 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.
[](https://agentmods.dev/skills/tonyfadel23/skill-inspector/check-my-skills)<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.
<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>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.
| Model | Per session | Once 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 | $0.00204 |
Grade A, and why
check-my-skills scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 12d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 249 lines — stays where its author put it; the contents beside it link to each section on GitHub.
check-my-skills — Skill Instruction Inspector
Purpose
Parse every skill in a project into a directed acyclic graph (DAG) of instruction nodes, visualize the flow as an interactive Dagre tree, and surface quality issues in the instruction chain. Two modes:
- Advanced (default): LLM-powered parsing via Anthropic API — deeper, catches nuance
- Standard (
--easy): Heuristic parsing — fast, no API calls, works offline
Step 0 — Setup
Detect Mode
Check the user's request for --easy or easy flag.
- If present → set
MODE=standard - If absent → set
MODE=advance
Locate Skill Directory
Find where this skill's supporting files are installed:
SKILL_DIR=$(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)
...
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.
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.
- 12d ago First seen · 249 lines · 114 tokens per session scan A f6e1b357a585
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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