Skillgaurd Review

Attention, security-savvy developers! As AI agents gain intelligence, their skills become new attack vectors. Enter SkillGuard, your open-source static security scanner purpose-built to catch and mitigate threats in JavaScript and TypeScript AI agent skills before deployment. It’s your first line of defense against shell injection, file tampering, and data exfiltration from potentially malicious third-party or custom agent capabilities.

AI agent skills often execute with host system permissions, creating a critical blind spot if not properly scanned. Malicious skills can exploit this, leading to remote code execution (e.g., via exec() or eval()), file system attacks (like fs.writeFileSync()), or silent data exfiltration (e.g., using fetch() to send process.env data). SkillGuard directly addresses these profound risks.

Main Features

SkillGuard offers robust, AST-based analysis to identify real threats, ensuring precision over regex false positives. Key capabilities include:

• 15+ Attack Patterns for comprehensive vulnerability detection.
• JS/TS File Support covering common agent skill languages.
• CI/CD Ready with machine-readable JSON output for automated security gates.
• Sub-Second Scans, perfect for pre-commit hooks and rapid checks.
• Dependency Scanning to flag malicious packages or typosquatting in your supply chain.

Threat Type	Example Vulnerability
CRITICAL: Remote Code Execution	exec(), eval(), new Function()
HIGH: File System Attacks	fs.writeFile(), Deno.remove()
MEDIUM: Data Exfiltration	fetch(), axios(), http.request()

Main Target?

SkillGuard is essential for any developer, team, or organization building, integrating, or auditing AI agent skills. If you need to secure your host systems against sophisticated supply chain attacks, RCE, or data breaches originating from agent capabilities, SkillGuard is your indispensable guardian, providing peace of mind and proactive protection.