In July 2025, Rw-r-r-0644 developed support for the __isoc23 variants of scanf, fscanf, and sscanf within the angr/angr repository, extending symbolic execution capabilities to cover new ISO C23 standard library interfaces. Using Python and leveraging skills in library development and reverse engineering, Rw-r-r-0644 implemented new SimProcedures that accurately model the behavior of these updated libc functions. This work addressed analysis gaps in input-parsing code paths, improving vulnerability discovery for modern codebases. The implementation followed repository conventions for maintainability and cross-platform compatibility, with thorough documentation and integration, reflecting a focused and technically deep engineering contribution.