During March 2026, Karun contributed to the nix-community/home-manager repository by developing an auto-close submaps feature for Hyprland window management. He introduced an onDispatch option within the submaps configuration, enabling submaps to close automatically after a dispatch event and reducing manual intervention for users. The implementation leveraged the Nix language and configuration management principles, with a focus on test-driven development to ensure reliability. Karun expanded the test suite to verify correct submap closure behavior, enhancing workflow predictability. His work demonstrated depth in system administration and integration patterns, delivering a targeted feature that improved the user experience for Hyprland users.