Worked on the picnixz/cpython repository to enhance diagnostics in multi-threaded environments by introducing a configurable thread dump limit for the faulthandler module. Developed a max_threads parameter for dump_traceback functions, replacing the previous hardcoded cap and centralizing the limit within the C source for easier maintenance. This change preserved backward compatibility by defaulting to the historical 100-thread limit while allowing greater flexibility for server processes with many threads. Leveraged C programming and Python development skills to improve observability and maintainability, ensuring that watchdog dumps now include the oldest thread for more comprehensive debugging in complex, multi-threaded applications.