During November 2025, gjlhbu developed a Java Serialized Object Byte Array Replacement feature for the yaklang/yaklang repository. This work introduced the ReplaceByteArrayInJavaSerilizable function, enabling targeted replacement of byte arrays within Java serialized objects, including support for base64-encoded class bytecode. The implementation included a defining_class_loader configuration to control class loading during deserialization, addressing complex exploitation scenarios. Comprehensive end-to-end tests were added to ensure reliability and safety. Working primarily in Go and focusing on backend development and testing, gjlhbu delivered a focused, technically deep feature that addressed a nuanced problem in Java object manipulation and serialization workflows.