audit-extensions

audit-extensions is a skill for Claude Code from Vibe-Marketer/plugins-and-skills. It costs 139 tokens per session (1,357 once invoked), scanned A, original, MIT.

A review guide for checking Claude Code extensions such as skills, slash commands, and subagents.

In plain words
What is it for?
Use it to audit an extension and receive strengths and specific findings tied to file locations.
Why use it?
It finds format errors, unclear triggers, unsafe patterns, and other problems that could make an extension unreliable.

Skill for Claude Code

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

Part of the create-plugins plugin — 12 skills, 6 commands, 9 agents shipped together

Good fit Use it to audit an extension and receive strengths and specific findings tied to file locations.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/vibe-marketer/plugins-and-skills/audit-extensions
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 Vibe-Marketer/plugins-and-skills --skill audit-extensions
Clone the repo
git clone --depth 1 https://github.com/Vibe-Marketer/plugins-and-skills

Made for: Claude Code.

Or install create-plugins, the plugin that ships this one along with the rest of its 12 skills, 6 commands, 9 agents.

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 audit-extensions

README.md
[![agentmods](https://agentmods.dev/badge/skills/vibe-marketer/plugins-and-skills/audit-extensions/github.svg)](https://agentmods.dev/skills/vibe-marketer/plugins-and-skills/audit-extensions)
Your own site
<a href="https://agentmods.dev/skills/vibe-marketer/plugins-and-skills/audit-extensions"><img src="https://agentmods.dev/badge/skills/vibe-marketer/plugins-and-skills/audit-extensions/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 audit-extensions

Your own site · 80×15
<a href="https://agentmods.dev/skills/vibe-marketer/plugins-and-skills/audit-extensions"><img src="https://agentmods.dev/badge/skills/vibe-marketer/plugins-and-skills/audit-extensions.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 139 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,357 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 $0.00139 $0.01357
Opus 5 $0.00069 $0.00678
Sonnet 5 $0.00028 $0.00271
Haiku 4.5 $0.00014 $0.00136

Measured 8d ago against content hash 0e6103c2b802, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

audit-extensions 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 8d 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.

create-plugins/skills/audit-extensions/SKILL.md · 146 lines

How it starts

The opening of the file, as written. The whole thing — 146 lines — stays where its author put it; the contents beside it link to each section on GitHub.

<essential_principles>

  1. Structure Before Content. Check that the extension follows the correct format before evaluating what it says. A beautifully written skill with invalid YAML is still broken.

  2. Severity-Based Reporting. Not all issues are equal. Critical issues prevent the extension from working. Recommendations improve quality. Quick fixes are cosmetic. Report in this order.

  3. Always Include Strengths. An audit that only lists problems demoralizes. Start with what the extension does well, then address issues.

  4. Specific Locations. Every finding must reference a file path and line number (or line range). "The description is too vague" is not actionable. "Line 3: description lacks trigger keywords -- add phrases like 'create a hook', 'add validation'" is actionable.

  5. Auto-Detect Extension Type. Determine whether the target is a skill, command, or subagent from the file path and structure. Don't require the user to specify.

</essential_principles>

Provide a path to any Claude Code extension:

  • Skill: Path to a skill directory or SKILL.md file
  • Slash command: Path to a .md command file
  • Subagent: Path to an agents/ directory or agent config

The audit type will be auto-detected from the path and file structure.

Auto-detection logic:

  1. If path contains SKILL.md or path is a directory containing SKILL.md -> skill audit
  2. If path is a .md file with allowed-tools in frontmatter -> command audit
  3. If path contains agent configuration with identifier field -> subagent audit
  4. If ambiguous, ask user to clarify

After detecting type, read references/audit-checklist.md for the relevant checklist, then execute the audit.

<audit_process>

For all extension types, follow this process:

Phase 1: Read

  1. Read the extension file(s) completely
  2. Read any referenced files (workflows, references, templates)
  3. Note file sizes (line counts)

Phase 2: Check Run through every item in the relevant checklist (see references/audit-checklist.md). For each item:

  • PASS: Requirement met
  • FAIL: Requirement not met (record file:line, severity, fix)
  • N/A: Check doesn't apply to this extension

Phase 3: Anti-Pattern Scan Check against all 18 anti-patterns from shared/rules/ANTI-PATTERNS.md:

  1. Markdown headings in skill body
  2. Hybrid XML/markdown
  3. Unclosed or improperly nested tags
  4. SKILL.md over 500 lines
  5. Deeply nested references
  6. Vague description
  7. Wrong point of view
  8. Missing trigger keywords
  9. Agent-focused instead of user-focused
  10. Over-engineered simple skills
  11. Under-specified complex skills
  12. Too many options without defaults
  13. Duplicating framework documentation
  14. Missing success criteria
  15. Explaining what Claude already knows
  16. Non-descriptive names
  17. Wrong case
  18. Name doesn't match directory

Phase 4: Report Organize findings by severity and present with strengths first.

</audit_process>

<output_format>

## Audit Report: [extension-name] ([type])

### Strengths
- [What the extension does well -- always include at least 2 items]

### Critical Issues (must fix)
- **[C1]** [file:line] [Issue description]
  Fix: [Specific remediation]

### Recommendations (should fix)
- **[R1]** [file:line] [Issue description]
  Fix: [Specific remediation]

### Quick Fixes (nice to have)
- **[Q1]** [file:line] [Issue description]
  Fix: [Specific remediation]

### Summary
- Checks passed: X/Y
- Critical: N | Recommendations: N | Quick fixes: N
- Anti-patterns detected: N/18

### Next Steps
- [ ] Fix critical issues
- [ ] Address recommendations
- [ ] Re-run audit to verify fixes
- [ ] Run trigger test (evaluate-skills) if description was changed

Read the full file on GitHub · 146 lines

Files

What ships with it

1 file 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. 8d ago First seen · 146 lines · 139 tokens per session scan A 0e6103c2b802

Subscribe to this mod's changes

audit-extensions is a skill published in the GitHub repository Vibe-Marketer/plugins-and-skills (2 stars, last pushed 6mo ago), licensed MIT. It adds 139 tokens to every session and 1,357 once invoked, about $0.0007 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.