Worked on the Chips Alliance caliptra-mcu-sw repository to enhance the reliability and maintainability of the MCI Emulator by addressing interrupt handling issues. Focused on embedded systems and low-level programming in Rust, the work involved fixing the Watchdog Timer interrupt assertion flow by routing it through the ERROR0 path and adding missing interrupt handlers to prevent spurious failures. Unused fields were removed to simplify code paths, reducing maintenance overhead and improving testability. These changes directly contributed to more robust MCU firmware validation by minimizing interrupt-related instability, demonstrating a methodical approach to debugging and code cleanup in a complex embedded environment.