Worked on the facebook/buck2-prelude repository to standardize versioned parameter handling for build targets, focusing on improving configuration clarity and future maintainability. The approach involved removing legacy __project__ keys in favor of project-name keys within versioned_* parameters, reducing ambiguity and potential misconfigurations. Temporary compatibility for multiple formats was implemented to ensure a smooth migration for existing users, minimizing disruption during the transition. This work, delivered through two targeted commits, leveraged skills in build systems, code compatibility, and code refactoring using Python and Starlark. The changes established a more unified and output-friendly parameter model for Buck2’s evolving build infrastructure.