Worked on enhancing the alarm subsystem in redox-os/relibc by implementing process-scoped alarm delivery and restructuring the codebase for improved POSIX compatibility. Expanded the test suite to validate alarm setting, cancellation, and re-arming, ensuring correct SIGALRM signal handling across platforms using C and Rust. In AFLplusplus/LibAFL, addressed error handling in the GeneralizationStage by routing non-Ok exit conditions through the canonical execution flow, which improved crash and timeout detection and strengthened the fuzzing pipeline. Maintained type safety by propagating required constraints, resulting in more robust system programming and higher-quality corpus management. Focused on reliability and standards compliance throughout.