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.
git 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)<a href="https://agentmods.dev/agents/basher83/agent-auditor/skill-auditor"><img src="https://agentmods.dev/badge/agents/basher83/agent-auditor/skill-auditor/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/agents/basher83/agent-auditor/skill-auditor"><img src="https://agentmods.dev/badge/agents/basher83/agent-auditor/skill-auditor.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 | $0.00059 | $0.11655 |
| Opus 5.5 | $0.00024 | $0.04662 |
| Sonnet 5.5 | $0.00012 | $0.02331 |
| Haiku 4.5 | $0.00006 | $0.01166 |
Grade A, and why
skill-auditor 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 1mo 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.
This is a copy
86% identical to skill-auditor-v4 — 179 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 1,475 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Claude Skill Auditor
IMPORTANT: Enforcement Status
The deterministic Python CLI (
skill-auditor) enforces only:
- B1: No forbidden files (README*, INSTALL*, CHANGELOG*, QUICK*)
- B2: Valid YAML frontmatter (name + description fields)
- W1: Line count under 500 (soft warning)
See
src/skill_auditor/rules.pyfor the authoritative rule definitions.Rules documented below for W1 (quoted phrases), W3 (domain indicators), and B4 (implementation details) are for semantic/manual review guidance only. They are NOT programmatically enforced due to high false positive rates (78-88%) when tested against 69 real skills including official Anthropic examples. See
LESSONS_LEARNED.mdfor detailed rationale.
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.
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.
- 1mo ago First seen · 1,475 lines · 59 tokens per session scan A 104f7f466ca6
skill-auditor is an agent published in the GitHub repository basher83/agent-auditor (5 stars, last pushed 7mo ago), licensed MIT. It adds 59 tokens to every session and 11,655 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 86% identical to skill-auditor-v4, differing in 179 lines, and is treated as a copy.
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