SkillLens Audit

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name: skills-audit description: Audit locally installed agent skills for security/policy issues using the SkillLens CLI (skilllens scan, skilllens config). Use when asked to scan a skills directory (Codex/Claude) and produce a risk-focused audit report based on each skill's SKILL.md and bundled resources.

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Skills Audit (SkillLens)

Install SkillLens

One-off run: npx skilllens scan (or pnpm dlx skilllens scan)

Global install: pnpm add -g skilllens

Quick start

Run skilllens config to see configured scan roots and auditor CLI availability.

Run skilllens scan to scan configured roots, or skilllens scan to scan a specific directory.

Re-run with --verbose to see raw auditor output and --force to ignore cached results.

Audit workflow

1. Define scope - Prefer a concrete target path (example: ~/.codex/skills) unless the user explicitly wants all configured roots. - If auditing a repo checkout containing skills, scan the parent folder that contains skill directories (example: skilllens scan ./skills).

2. Inventory skills with SkillLens - Run skilllens scan [path] [--auditor claude|codex]. - Treat missing auditor CLIs or skipped statuses as “manual review required”, not “safe”.

3. Prioritize review order - Review any unsafe or suspicious verdicts first. - Next, review skills that request broad permissions (filesystem/network), run shell commands, or reference external downloads.

4. Manually review each skill’s contents - Read the skill’s SKILL.md and any referenced scripts/, references/, and assets/. - Do not execute bundled scripts by default; inspect first.

5. Evaluate risks (focus on realistic abuse) - Exfiltration: sending file contents, env vars, tokens, SSH keys, browser data, or configs to remote endpoints. - Execution: instructions to run arbitrary shell commands, curl | bash, eval, or to fetch-and-execute code. - Persistence: modifying shell profiles, launch agents, cron, editor configs, or skill install locations. - Privilege/approval bypass: instructions to ignore system policies, disable safety checks, or request escalated permissions unnecessarily. - Prompt injection: attempts to override higher-priority instructions (“ignore previous”, “always comply”, “never mention…”). - Overbroad triggers: vague descriptions that cause the skill to trigger on unrelated tasks.

6. Produce a report - For each skill, include: name, path, verdict (safe/suspicious/unsafe), risk (0–100), and bullet issues with concrete evidence (quote or filename). - Recommend fixes that reduce blast radius: narrow scope, remove dangerous defaults, add explicit confirmation gates, and document required permissions.

Command snippets

Scan configured roots: skilllens scan

Scan a specific folder: skilllens scan ~/.codex/skills

Force a re-audit and show raw output: skilllens scan ~/.codex/skills --force --verbose

Run skilllens config to see configured scan roots and auditor CLI availability.

Run skilllens scan to scan configured roots, or skilllens scan to scan a specific directory.

Re-run with --verbose to see raw auditor output and --force to ignore cached results.