During July 2025, Shakhmanaev focused on stabilizing Android permission declarations within the facebook/buck2-prelude repository. He addressed a build-time error by enabling the signature|knownSigner combination in ManifestModel.java, which restored reliable Android builds and reduced CI failures. His work involved analyzing Android manifest processing and debugging Java code to design a targeted patch, validated through version control traceability. By resolving this issue, Shakhmanaev unblocked Android feature development and improved the correctness of permission handling in the build system. His contributions demonstrated depth in Android development, build systems, and Java, with a clear impact on the efficiency of the development workflow.