skill-scanner

skill-scanner is a skill for Claude Code, Codex from OpenCoven/coven. It costs 87 tokens per session (1,012 once invoked), scanned A, original, MIT.

A checker for AgentSkills, which are packaged instruction files for coding agents. It validates the package structure and runs security scans before submission.

In plain words
What is it for?
Use it to scan, audit, validate, package, or prepare a skill for submission, including producing JSON or SARIF scan reports.
Why use it?
It catches packaging problems and potentially unsafe code or instructions before a skill is distributed.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/opencoven/coven/skill-scanner
Any agent
npx skills add OpenCoven/coven --skill skill-scanner
Clone the repo
git clone --depth 1 https://github.com/OpenCoven/coven

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 skill-scanner

README.md
[![agentmods](https://agentmods.dev/badge/skills/opencoven/coven/skill-scanner.svg)](https://agentmods.dev/skills/opencoven/coven/skill-scanner)
Your own site
<a href="https://agentmods.dev/skills/opencoven/coven/skill-scanner"><img src="https://agentmods.dev/badge/skills/opencoven/coven/skill-scanner.svg" alt="Measured on agentmods" height="20"></a>
Per session 87 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,012 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00087 $0.01012
Opus 5 $0.00044 $0.00506
Sonnet 5 $0.00017 $0.00202
Haiku 4.5 $0.00009 $0.00101

Measured 4d ago against content hash 7c756292f5e3, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

skill-scanner 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 4d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/scan-skill.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/skill-scanner/SKILL.md · 115 lines

How it starts

The opening of the file, as written. The whole thing — 115 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Skill Scanner

Use this skill for pre-submit scanning and validation of AgentSkills.

Prime directive

Do not call a skill ready until both gates have been attempted:

  1. Skill structure gateopenclaw skills check and/or package_skill.py validation.
  2. Security scan gatecodeql-sdk / clawhub-audit scan.

If CodeQL CLI is missing, report that as a blocker and give the exact install/rerun command. If CodeQL runs but reports no analyzable source code, mark the security scan as not applicable, not passed. Do not silently replace the scan with weaker checks.

Default local paths

  • SDK repo: /Users/buns/Documents/GitHub/BunsDev/codeql-sdk
  • SDK CLI source: /Users/buns/Documents/GitHub/BunsDev/codeql-sdk/dist/cli.js
  • Skill creator package validator: ~/.nvm/versions/node/v24.13.0/lib/node_modules/openclaw/skills/skill-creator/scripts/package_skill.py
  • Workspace skills root: /Users/buns/.openclaw/workspace/skills

Read references/codeql-sdk.md for CLI details, report formats, and troubleshooting.

Standard scan workflow

Given a skill directory:

SKILL_DIR=/absolute/path/to/skill
REPORT_DIR="$(dirname "$SKILL_DIR")/.scan-reports/$(basename "$SKILL_DIR")"
mkdir -p "$REPORT_DIR"
  1. Preflight:
test -f "$SKILL_DIR/SKILL.md"
node /Users/buns/Documents/GitHub/BunsDev/codeql-sdk/dist/cli.js version
command -v codeql || test -x "$CODEQL_PATH"
  1. Validate structure:
openclaw skills check
python3 ~/.nvm/versions/node/v24.13.0/lib/node_modules/openclaw/skills/skill-creator/scripts/package_skill.py "$SKILL_DIR" /tmp/skill-packages
  1. Run CodeQL SDK scan:
node /Users/buns/Documents/GitHub/BunsDev/codeql-sdk/dist/cli.js audit "$SKILL_DIR" \
  --format json \
  --output "$REPORT_DIR/codeql-sdk-results.json" \
  --fail-on-high
  1. If the JSON scan passes, optionally generate SARIF for CI/ClawHub:
node /Users/buns/Documents/GitHub/BunsDev/codeql-sdk/dist/cli.js audit "$SKILL_DIR" \
  --format sarif \
  --output "$REPORT_DIR/codeql-sdk-results.sarif"

Read the full file on GitHub · 115 lines

Files

What ships with it

2 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. 4d ago First seen · 115 lines · 87 tokens per session scan A 7c756292f5e3

Subscribe to this mod's changes

skill-scanner is a skill published in the GitHub repository OpenCoven/coven (46 stars, last pushed today), licensed MIT. It adds 87 tokens to every session and 1,012 once invoked, about $0.0004 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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