Worked on improving error classification within the google/clusterfuzz repository by addressing the mislabeling of Chromium NOTREACHED() assertions as CHECK failures. Focused on refining the parsing logic using regular expressions and enhanced the reliability of crash analysis by updating the fuzzing workflow. Developed and integrated dedicated unit tests and new test data to validate the improved classification, ensuring that NOTREACHED() errors are now accurately detected and triaged. Utilized C++ and Python to implement these changes, which reduced false positives in fuzzing results and streamlined the triage process. The work demonstrated careful attention to parsing accuracy and regression prevention.