GitHub - cisco-ai-defense/skill-scanner: Security Scanner for Agent Skills

# Using uv (recommended)
uv pip install cisco-ai-skill-scanner

# Using pip
pip install cisco-ai-skill-scanner

# For LLM analyzer and Meta-analyzer
export SKILL_SCANNER_LLM_API_KEY="your_api_key"
export SKILL_SCANNER_LLM_MODEL="claude-3-5-sonnet-20241022"

# For VirusTotal binary scanning
export VIRUSTOTAL_API_KEY="your_virustotal_api_key"

# For Cisco AI Defense
export AI_DEFENSE_API_KEY="your_aidefense_api_key"

# Scan a single skill (core analyzers: static + bytecode + pipeline)
skill-scanner scan /path/to/skill

# Scan with behavioral analyzer (dataflow analysis)
skill-scanner scan /path/to/skill --use-behavioral

# Scan with all engines
skill-scanner scan /path/to/skill --use-behavioral --use-llm --use-aidefense

# Scan with meta-analyzer for false positive filtering
skill-scanner scan /path/to/skill --use-llm --enable-meta

# Scan with trigger analyzer for vague description checks
skill-scanner scan /path/to/skill --use-trigger

# Run LLM analyzer multiple times and keep majority-agreed findings
skill-scanner scan /path/to/skill --use-llm --llm-consensus-runs 3

# Scan multiple skills recursively
skill-scanner scan-all /path/to/skills --recursive --use-behavioral

# Scan multiple skills with cross-skill overlap detection
skill-scanner scan-all /path/to/skills --recursive --check-overlap

# Scan a GitHub repository (owner/repo shorthand or full URL)
skill-scanner scan-repo owner/repo
skill-scanner scan-repo https://github.com/owner/repo --use-llm

# Lenient mode: tolerate malformed skills instead of failing
skill-scanner scan /path/to/skill --lenient
skill-scanner scan-all /path/to/skills --recursive --lenient

# Lenient mode with non-standard skill formats (no SKILL.md required)
skill-scanner scan .claude/commands/deploy --lenient
skill-scanner scan-all .claude/commands --recursive --lenient

# Use a custom metadata filename instead of SKILL.md
skill-scanner scan /path/to/skill --skill-file README.md

# CI/CD: Fail build if threats found
skill-scanner scan-all ./skills --fail-on-severity high --format sarif --output results.sarif

# Generate interactive HTML report with attack correlation groups
skill-scanner scan /path/to/skill --use-llm --enable-meta --format html --output report.html

# Use custom YARA rules
skill-scanner scan /path/to/skill --custom-rules /path/to/my-rules/

# Use custom taxonomy + threat mapping profiles (JSON/YAML)
skill-scanner scan /path/to/skill --taxonomy /path/to/taxonomy.json --threat-mapping /path/to/threat_mapping.json

# VirusTotal hash scan with optional unknown-file uploads
skill-scanner scan /path/to/skill --use-virustotal --vt-upload-files

# Use a scan policy preset (strict, balanced, permissive)
skill-scanner scan /path/to/skill --policy strict

# Use a custom org policy file
skill-scanner scan /path/to/skill --policy my_org_policy.yaml

# Generate a policy file to customise
skill-scanner generate-policy -o my_org_policy.yaml

# Interactive policy configurator (TUI)
skill-scanner configure-policy

from skill_scanner import SkillScanner
from skill_scanner.core.analyzers import BehavioralAnalyzer

# Create scanner with analyzers
scanner = SkillScanner(analyzers=[
    BehavioralAnalyzer(),
])

# Scan a skill
result = scanner.scan_skill("/path/to/skill")

print(f"Findings: {len(result.findings)}")
print(f"Max severity: {result.max_severity}")

# Note: is_safe indicates no HIGH/CRITICAL findings were detected.
# It does not guarantee the skill is free of all risk.
if not result.is_safe:
    print("Issues detected -- review findings before deployment")

$ skill-scanner scan ./my-skill --use-behavioral

============================================================
Skill: my-skill
============================================================
Status: [OK] No findings
Max Severity: NONE
Total Findings: 0
Scan Duration: 0.15s

# .github/workflows/scan-skills.yml
name: Scan Skills
on:
  pull_request:
    paths: [".cursor/skills/**"]
jobs:
  scan:
    uses: cisco-ai-defense/skill-scanner/.github/workflows/scan-skills.yml@main
    with:
      skill_path: .cursor/skills
    permissions:
      security-events: write
      contents: read

# .pre-commit-config.yaml
repos:
  - repo: https://github.com/cisco-ai-defense/skill-scanner
    rev: v1.0.0  # use the latest release tag
    hooks:
      - id: skill-scanner

skill-scanner-pre-commit install