During August 2025, Darkcyan Kitty delivered X-UI Service Security Hardening for the MHSanaei/3x-ui repository, focusing on reducing the attack surface of the X-UI service. They applied Linux system administration and security expertise to implement access controls that restrict the service’s ability to interact with sensitive resources such as home directories, kernel modules, control groups, kernel logs, hostnames, and clock settings. Using systemd unit file configuration, Darkcyan Kitty enforced non-executable memory (W^X) for the X-UI process, mitigating memory-based attacks. This work demonstrated a deep understanding of system hardening and contributed to a more isolated, secure runtime environment.