During their recent work, Cooper developed two targeted features across facebook/chef-cookbooks and facebook/pyrefly, focusing on configuration management and dependency hygiene. In chef-cookbooks, Cooper enhanced JSON serialization performance by introducing a parameter-driven installer for the python3-ujson package, enabling flexible deployment and maintaining backward compatibility. This Ruby-based solution improved runtime efficiency and allowed for future configurability. In pyrefly, Cooper upgraded the configparser dependency to version 3.1.0 within the Rust codebase, strengthening configuration handling and preparing the project for future enhancements. Cooper’s contributions demonstrated a methodical approach to feature delivery, emphasizing traceability, maintainability, and robust dependency management throughout the development process.