hardening

MEDIUM W013: Attempt to modify system services in skill instructions.

• Attempt to modify system services in skill instructions detected (high risk: 1.00). The prompt directly instructs modifying privileged system files (/etc/ssh/sshd_config, /etc/sysctl.d/, /etc/* security files), changing file permissions/attributes, and restarting services (systemctl), which require root and therefore compromise the machine state.