In August 2025, Srdjan Stanisic focused on improving debugging reliability for the tt-exalens repository by addressing a critical issue in callstack unwinding when a core halts with the ebreak instruction. He implemented a fix that rewinds the program counter to the ebreak instruction before unwinding, ensuring accurate callstack information and preventing misleading reports after a halt. Working primarily in Python and leveraging his expertise in embedded systems and unit testing, Srdjan updated the RiscDebug integration and expanded test coverage to include the ebreak halt scenario. This work enhanced post-halt triage speed and provided stronger regression protection for the codebase.