Developed and delivered a Command Line Register Expansion feature for the helix-editor/helix repository, enabling users to inspect register contents directly from the terminal using the %reg{} syntax. The work involved designing and implementing the feature in Rust, with a focus on seamless command line interface integration and maintaining existing user experience standards. Testing and validation were prioritized to ensure reliable performance and clean integration with the existing codebase. The feature enhanced debugging and scripting workflows by providing richer CLI-based register visibility, and the development process demonstrated end-to-end ownership from initial design through to final repository integration and validation.