Worked on the rust-lang/miri and rust-lang/rust repositories, delivering six features focused on cross-platform tooling and cryptographic performance. Integrated the Capstone disassembly framework for x86 while removing arm64 stubs, enhancing compatibility and maintainability across architectures. Implemented the AArch64 vtbl1_u8 intrinsic to optimize ChaCha20 encryption by enabling efficient byte vector table lookups, improving cryptographic throughput. Prioritized code quality by conducting thorough documentation and readability cleanups, addressing typographical errors and clarifying comments. Leveraged expertise in Rust, AArch64 architecture, and low-level systems programming to align codebases strategically, reduce future maintenance, and support faster onboarding without introducing breaking changes.