Worked on the square/wire repository to deliver a new Kotlin Enum Generation Mode option, enhancing the configurability of enum handling for Kotlin clients. Introduced the --kotlin_enum_mode compiler flag, allowing users to select between standard enum classes and sealed classes with data objects. Updated the WireCompiler API and implemented the supporting code generation logic in Java and Kotlin, ensuring compatibility with existing workflows. Expanded the test suite to validate the new mode across common usage patterns, focusing on robust API design and compiler development. This work improved interoperability and flexibility for users integrating Kotlin enums into their codebases without breaking changes.