This teaches WordPress's three-layer security model: sanitize inputs, validate business logic, escape outputs. It's aimed at intermediate to advanced developers working on WordPress 6.7+ with PHP 8.3+ who need to prevent XSS, CSRF, and SQL injection vulnerabilities. The approach is practical and opinionated, which is exactly what you want for security. With 242 installs and clean audit passes from major security tools, it's seeing real adoption. If you're building WordPress plugins or themes and haven't internalized the "sanitize, validate, escape" pattern, this will get you there faster than piecing together documentation.
npx skills add https://github.com/bobmatnyc/claude-mpm-skills --skill wordpress-security-validation