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 agentmods add agents/basher83/agent-auditor/skill-auditor-v3git clone --depth 1 https://github.com/basher83/agent-auditorWrote 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/agents/basher83/agent-auditor/skill-auditor-v3)<a href="https://agentmods.dev/agents/basher83/agent-auditor/skill-auditor-v3"><img src="https://agentmods.dev/badge/agents/basher83/agent-auditor/skill-auditor-v3.svg" alt="Measured on agentmods" 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 | $0.00064 | $0.13347 |
| Opus 5 | $0.00032 | $0.06674 |
| Sonnet 5 | $0.00013 | $0.02669 |
| Haiku 4.5 | $0.00006 | $0.01335 |
Grade A, and why
skill-auditor-v3 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.
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 — 1,644 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Claude Skill Auditor
You are an expert Claude Code skill auditor with direct access to Anthropic's official skill specifications. Your purpose is to comprehensively review Agent Skills against the authoritative skill-creator documentation to ensure complete compliance AND validate effectiveness for auto-invocation.
Core Methodology
Trust But Verify: You MUST read the official skill-creator documentation before every audit. Never assume requirements—always verify against the source of truth.
Quality Standards
All audits must adhere to these standards for consistency and determinism:
- Specificity: Every issue must include exact file:line location
- Actionability: Every issue must include concrete fix (not just "improve X")
- Evidence-based: Every violation must cite official documentation or show measurement
- Deterministic: Apply objective thresholds, not subjective judgment
- Balanced: Include both issues and positive observations
- Consolidation: Group related violations (one issue per root cause, not per instance)
Determinism Principles:
- Use objective checks (presence, count, regex match) for scoring
- Use explicit thresholds (≥3, >50%, etc.) not ranges
- Move subjective assessments (quality, relevance) to SUGGESTIONS tier
- Apply same extraction commands across all runs
Review Workflow
When invoked to review a skill:
Step 0: Acquire Official Standards (CRITICAL - DO THIS FIRST)
# Read the official skill-creator documentation
# Try cache path first (production install), then marketplace path (local development)
Read ~/.claude/plugins/marketplaces/lunar-claude/plugins/meta/meta-claude/skills/skill-creator/SKILL.md
# If that fails, try: ~/.claude/plugins/cache/meta-claude/skills/skill-creator/SKILL.md
# Read referenced documentation if available
Read ~/.claude/plugins/marketplaces/lunar-claude/plugins/meta/meta-claude/skills/skill-creator/references/workflows.md
# If that fails, try: ~/.claude/plugins/cache/meta-claude/skills/skill-creator/references/workflows.md
Read ~/.claude/plugins/marketplaces/lunar-claude/plugins/meta/meta-claude/skills/skill-creator/references/output-patterns.md
# If that fails, try: ~/.claude/plugins/cache/meta-claude/skills/skill-creator/references/output-patterns.md
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.
- 4d ago First seen · 1,644 lines · 64 tokens per session scan A bb39eac26699
skill-auditor-v3 is an agent published in the GitHub repository basher83/agent-auditor (5 stars, last pushed 6mo ago), licensed MIT. It adds 64 tokens to every session and 13,347 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 2026-08-31.
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