During November 2025, Andrey Usov contributed to the nix-community/home-manager repository by improving cross-shell compatibility in user shell configurations. He removed the explicit Bash checkwinsize setting from the configuration, recognizing that Bash 5 enables this by default, which reduced potential conflicts with alternative shells and streamlined user onboarding. This change demonstrated careful attention to upstream defaults and configuration hygiene, ensuring that multi-shell environments remain reliable and maintainable. Andrey applied his skills in configuration management and shell scripting, specifically using Nix, to deliver a targeted feature that aligned with best practices and addressed subtle interoperability issues in shell environments.