I'm not the original poster, but: > Is fuzzing something for me to improve code quality, Is it C/C++ and does it include parsers? Then definitely yes. If not

I'm not the original poster, but: > Is fuzzing something for me to improve code quality, Is it C/C++ and does it include parsers? Then definitely yes. If not it depends. > or are tests the lower hanging fruit? Again: Is it C/C++? Then familiarize yourself with the sanitizer features of gcc and clang, primarily address sanitizer. Lots of "rotting" code shows memory safety errors just by running them with asan.