Worked on improving directory filtering reliability in the fosskers/raylib-1 repository by addressing a bug in the filter detection logic. Focused on stabilizing the feature by replacing the previous TextFindIndex approach with the C standard library’s strstr function, which enhanced the accuracy of string matching for directory filters. Added an explicit check for the DIRECTORY_FILTER_TAG to ensure correct identification, reducing both false positives and negatives in filter application. Utilized C and string manipulation techniques to deliver a more robust solution, resulting in fewer edge-case failures and a smoother user experience when interacting with directory-related features in the codebase.