Over a two-month period, contributed to CLI development and Nix package management by implementing targeted improvements in Rust and Nix. In the jdx/usage repository, developed a configurable binary path feature for the usage CLI, allowing users to specify the binary location via the CARGO_BIN_EXE_usage environment variable, which enhanced reliability and reproducibility across local and CI environments. Later, addressed a deprecation warning in nix-community/nixvim by updating the Python LSP Server integration to maintain compatibility with future Nixpkgs releases. This work preserved Python LSP functionality for users and reduced future maintenance risk, demonstrating careful attention to environment stability and developer experience.