kitsune-den/skulk-skills/skulk-skill-scanner

Skill Scanner

Security scanner for OpenClaw agent skills. Static analysis for red flags.

Usage

node scripts/scanner.js <path-to-skill> [--verbose] [--json] [--summary] [--ignore <path>] [--include-self]

Examples

# Scan a downloaded skill folder before enabling it
clawhub inspect some-skill
node scripts/scanner.js ./skills/some-skill --verbose
 
# Scan your own skill before publishing
node scripts/scanner.js ./skills/my-skill
 
# JSON output for automation
node scripts/scanner.js ./skills/my-skill --json
 
# One-line summary output for heartbeat checks
node scripts/scanner.js ./skills/my-skill --summary
 
# Include scanner internals (off by default to reduce self-scan noise)
node scripts/scanner.js ./skills/skulk-skill-scanner --include-self

What It Catches

Scoring

• Each unique rule deducts points: critical=30, high=15, medium=5, info=0
• Score 75-100: ✅ PASS
• Score 50-74: ⚠️ WARN
• Score 0-49 or any critical: ❌ FAIL
• Exit code 1 on FAIL (CI-friendly)

Safe Domain Allowlist

Known legitimate API domains are allowlisted to reduce false positives on network-related rules. Edit the SAFE_DOMAINS array in scripts/scanner.js to customize.

Limitations

This is static pattern matching — it catches obvious and moderately obfuscated attacks but cannot detect:

• Sophisticated multi-step social engineering
• Runtime-generated URLs or dynamic exfiltration
• Attacks that look identical to legitimate skill behavior

It's a first line of defense, not a guarantee. Always review skills manually before granting sensitive access.