Worked on the jdx/mise repository to enhance help documentation and configuration reliability in a Rust-based backend environment. Delivered a feature that upgraded the usage-lib to version 3, enabling improved rendering of usage examples in task help output and refactored command specification logic to leverage new library capabilities. Addressed a critical bug by filtering empty segments from colon-separated MISE_OVERRIDE_CONFIG_FILENAMES values, preventing runtime panics and ensuring safer configuration handling. Emphasized robust testing practices by adding both unit and end-to-end tests for help rendering and config parsing, utilizing Rust and Bash to strengthen reliability and maintainability across diverse deployment scenarios.