Worked on the slackhq/etcd repository to enhance configuration management by implementing robust configuration parsing with deprecation warnings. Focused on refactoring the parsing logic to accurately detect deprecated options from both command-line flags and YAML configuration files, leveraging Go’s standard library for improved reliability. Developed and expanded unit tests to validate the handling of deprecated experimental and snapshot-related options, ensuring that appropriate warnings are logged to guide users during migrations. This work reduced the risk of misconfigurations and supported smoother transitions by providing clear feedback, while emphasizing skills in Go development, configuration management, and comprehensive testing practices throughout the process.