Worked on the tianocore/edk2 repository to address a critical bug in ACPI HEST table parsing, focusing on ensuring that hardware bank count data remained read-only during boot-time firmware initialization. The solution involved removing mutation of the mHestIA32HardwareBankCount variable within ShellPkg/AcpiView, thereby preserving the integrity of ACPI HEST data and reducing the risk of firmware data corruption. This targeted change improved system stability and reliability by adhering to best practices in read-only parsing and code hygiene. The work demonstrated expertise in C, embedded systems, and ACPI data structures, with careful attention to minimizing the impact of changes.