Worked on Guardsquare/proguard-core to enhance the AccumulatedCodeInjector by adding robust support for array arguments during code injection. Addressed the challenge of handling various argument types by introducing a pushArgument helper method, enabling seamless injection of primitive, string, and array values. Developed and integrated targeted tests to validate array handling in logging scenarios, ensuring reliability and reducing edge-case failures in production environments. Utilized Java and Kotlin for bytecode manipulation and comprehensive testing, focusing on improving instrumentation reliability. The contribution delivered a focused, well-tested feature that strengthens the code injection process and supports more complex use cases within the repository.