Security Engineering Guide Overview This guide covers application security, infrastructure hardening, threat modeling, vulnerability management, and security operations. Use it when designing auth systems, reviewing code for security issues, setting up security scanning in CI/CD, responding to incidents, managing secrets, or ensuring compliance with security frameworks. First 10 Minutes - Map the attack surface before suggesting fixes: public routes, auth entrypoints, admin paths, file upload/download flows, third-party callbacks, and secrets-loading paths. - Run the bundled scripts from the…