During November 2024, Mtf contributed to the catppuccin/nix repository by implementing Fcitx5 input method support within NixOS configurations, focusing on seamless integration with Catppuccin theming. Mtf developed a dedicated NixOS module for Fcitx5 theming, ensuring that multilingual input and visual consistency were maintained across user environments. The work involved updating the test suite to validate compatibility with stable NixOS options, reducing configuration fragility and supporting broader adoption of Catppuccin themes. Utilizing Nix and system administration skills, Mtf’s engineering addressed both user experience and maintainability, though the scope was limited to a single feature without reported bug fixes.