Scan ClawHub skills for security vulnerabilities BEFORE installing. Use when installing new skills from ClawHub to detect prompt injections, malware payloads, hardcoded secrets, and other threats. Wraps clawhub install with Snyk Agent Scan pre-flight checks.
Follow the repository instructions for this skill and your agent. Review the files and dependencies before adding it to your workflow.
SkillHub CLI
skillhub install firefrog-pepe/skill-guard-snyk-agent-scanInspect the source and compatibility requirements, then follow its installation steps.
Give your agent the source link and ask it to inspect instructions and dependencies before explaining the installation steps.
The only pre-install security gate for ClawHub skills.
| VirusTotal (ClawHub built-in) | skillscanner (Gen Digital) | skill-guard | |
|---|---|---|---|
| When it runs | After publish (server-side) | On-demand lookup | Before install (client-side) |
| What it checks | Malware signatures | Their database | Actual skill content |
| Prompt injections | ❌ | ❌ | ✅ |
| Data exfiltration URLs | ❌ | ❌ | ✅ |
| Hidden instructions | ❌ | ❌ | ✅ |
| AI-specific threats | ❌ | ❌ | ✅ |
| Install blocking | ❌ | ❌ | ✅ |
VirusTotal catches known malware binaries — but won't flag <!-- IGNORE PREVIOUS INSTRUCTIONS -->.
skillscanner checks if Gen Digital has reviewed it — but can't scan new or updated skills.
skill-guard uses Snyk Agent Scan (the renamed successor to mcp-scan) to analyze what's actually in the skill, catches AI-specific threats, and blocks install if issues are found. If the scanner is unavailable or not configured, the wrapper now reports that separately instead of pretending the skill itself is malicious.
Skills can contain:
One bad skill = compromised agent. Your agent trusts skills implicitly.
# Instead of: clawhub install some-skill
./scripts/safe-install.sh some-skill
skill-guard:
/tmp/) — never touches your real skills folderReal exampl...
These signals come from indexed source analysis and may lag behind changes. Check the current source files.
# skill-guard **The only pre-install security gate for ClawHub skills.** ## Why skill-guard? | | **VirusTotal** (ClawHub built-in) | **skillscanner** (Gen Digital) | **skill-guard** | |---|---|---|---| | **When it runs** | After publish (server-side) | On-demand lookup | **Before install (client-side)** | | **What it checks** | Malware signatures | Their database | **Actual skill content** | | **Prompt injections** | ❌ | ❌ | ✅ | | **Data exfiltration URLs** | ❌ | ❌ | ✅ | | **Hidden instructions** | ❌ | ❌ | ✅ | | **AI-specific threats** | ❌ | ❌ | ✅ | | **Install blocking** | ❌ | ❌ | ✅ | **VirusTotal** catches known malware binaries — but won't flag `<!-- IGNORE PREVIOUS INSTRUCTIONS -->`. **skillscanner** checks if Gen Digital has reviewed it — but can't scan new or updated skills. **skill-guard** uses Snyk Agent Scan (the renamed successor to `mcp-scan`) to analyze what's actually in the skill, catches AI-specific threats, and blocks install if issues are found. If the scanner is unavailable or not configured, the wrapper now reports that separately instead of pretending the skill itself is malicious. ## The Problem Skills can contain: - 🎭 **Prompt injections** — hidden "ignore previous instructions" attacks - 💀 **Malware payloads** — dangerous commands disguised in natural language - 🔑 **Hardcoded secrets** — API keys, tokens in plain text - 📤 **Data exfiltration** — URLs that leak your conversations, memory, files - ⛓️ **Toxic flows** — instructions that chain into harmful actions **One bad skill = compromised agent.** Your agent trusts skills implicitly. ## The Solution ```bash # Instead of: clawhub install some-skill ./scripts/safe-install.sh some-skill ``` skill-guard: 1. **Downloads to staging** (`/tmp/`) — never touches your real skills folder 2. **Scans with Snyk Agent Scan** — Snyk's security scanner for AI agents 3. **Blocks or installs** — clean skills get installed, threats get quarantined ## What It Catches Real exampl...
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