Worked on the firedancer-io/firedancer repository to deliver a focused codebase refactor, relocating the pack module from ballet to disco. This change clarified module boundaries and improved maintainability without altering existing functionality. The approach involved updating all relevant import paths and references across both C and Python files, ensuring build and runtime stability throughout the transition. Emphasizing code organization and refactoring skills, the work reduced coupling between components and laid a foundation for easier future enhancements. The reorganization was carefully tracked for auditability, reflecting a methodical engineering process that prioritized long-term maintainability and clear project structure within the build system.