Worked on enhancing cross-platform stability and server reliability for the facebook/hermes and onejs/one repositories, focusing on safe FFI interoperability and predictable build behavior. Addressed a memory layout issue in C++ by introducing a macro for Empty Base Optimization, ensuring correct structure alignment and preventing FFI crashes on Windows. Implemented a server-side build output directory mechanism in Node.js, decoupling runtime configuration from serve logic for greater flexibility. Added cross-platform path normalization using JavaScript and TypeScript, standardizing file references across operating systems. These changes improved reliability for external consumers, reduced runtime surprises, and strengthened the overall robustness of the build and serve processes.