nx_engineer_crash.nx

nx_engineer_crash.nx -- the Engineer organ that finds CRASHES, not just bad exit codes. The gate runner / race gate read wait_exit_code (bits 8-15) and so see a SIGSEGV as exit 0 -- blind to the worst failure. A self-sufficient team must catch its own crashes. This decodes the FULL wait4 status: a process killed by a signal (segfault=11, abort=6, ...) is reported as a CRASH with the signal number, and its captured stdout is preserved so the LAST line localizes where it died. wait4 status (Linux): low 7 bits = terminating signal (0 = exited normally, 0x7f = stopped); bits 8-15 = exit code when exited normally.