Worked on the AFLplusplus/LibAFL repository to enhance coverage tracing and maintainability in compiler instrumentation and fuzzing workflows. Addressed a key bug by correcting argument size handling for value profiling and cmplog, ensuring conditional comparisons are accurately measured rather than defaulting to 1-byte values. This change improved the reliability of profiling and measurement fidelity. Additionally, refactored the Windows ASan setup function for simpler maintenance and better compatibility. The work was implemented in C and Rust, demonstrating a strong focus on system programming and code quality. All changes were closely aligned with tracked issues and delivered through a documented commit.