Gab worked on the swiftlang/swift-java repository, focusing on improving the stability and safety of Java Native Interface (JNI) integration for Swift plugins. He addressed a critical issue where JNI symbols were not properly exposed in release builds, updating both the implementation and associated tests to ensure correct public symbol visibility. Using Java and Swift, Gab also enhanced the SwiftJavaPlugin by refining configuration safety, removing unsafe flags, and documenting compatibility with Swift 6. His work reduced runtime risks for Java bindings, clarified onboarding documentation, and laid the foundation for smoother interoperability between Swift and Java in future development cycles.