Skill Vetter

Security scanner that analyzes skill code before installation.

When to Use

• Before any skill installation via ClawHub or manual
• Before any skill update (even trusted skills)
• When user asks: "vet this skill", "check security", "scan before install"
• When installing skills from unknown sources

Security Checks (Priority Order)

🔴 Critical (Block Install)

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🟡 Medium (Warn + Allow)

🔵 Info (Log Only)

Usage

Automatic Vetting (via Hook)

When OpenClaw hooks are configured, the vetter runs automatically:

# Configure in OpenClaw settings
skill_vetter:
  enabled: true
  auto_block: true   # Block critical issues
  warn_only: false    # false = block criticals

Manual Vetting

python3 ~/.openclaw/skills/skill-vetter/scripts/vetter.py \
    scan ~/.openclaw/skills/my-skill

Output Format

╔══════════════════════════════════════════════════╗
║ 🛡️ Skill Security Vetting Report                  ║
╠══════════════════════════════════════════════════╣
║ Skill: my-skill                                   ║
║ Scan Time: 2026-04-06 07:21:00                   ║
║                                                          ║
║ 🔴 CRITICAL: 0  🟡 WARNING: 2  🔵 INFO: 1            ║
╠══════════════════════════════════════════════════╣
║ Findings:                                              ║
║   (see actual scan output for details)                 ║
╠══════════════════════════════════════════════════╣
║ Verdict: ⚠️ INSTALL WITH CAUTION                       ║
╚══════════════════════════════════════════════════╝

Integration

For automatic pre-install vetting, this skill should be invoked by the OpenClaw skill installation hook. The hook configuration:

# In OpenClaw config
hooks:
  pre_skill_install:
    - name: skill-vetter
      action: scan_then_block
      block_on_critical: true

Verdict Logic

Implementation

The scanner is in scripts/vetter.py. Key functions:

• scan_skill(skill_path) - Main entry point
• check_dangerous_commands(content) - Bash pattern matching
• check_sensitive_access(content) - File/credential patterns
• check_network_activity(content) - Exfil indicators
• check_obfuscation(content) - Obfuscated code detection
• generate_report(findings) - Formatted output