In April 2025, Richard Townsend delivered ARM64 Branch Target Identification (BTI) security hardening for the google/XNNPACK repository on Android and Linux platforms. He introduced initial BTI support by adding build and configuration flags, and implemented a kernel landing pad in ARM assembly to enforce control-flow integrity. To ensure safe and targeted application, he refined the approach to restrict BTI usage to Clang builds on Android and Linux. Working primarily with Assembly, C++, and CMake, Richard focused on strengthening the security baseline for mobile deployments. His contributions reflect a deep understanding of build systems, compiler flags, and platform-specific security.