Live edit is great. It has its limits though. From a developer what I want is to mark some files / library for 'MRI execution'. When every line is hit in the fi

Live edit is great. It has its limits though. From a developer what I want is to mark some files / library for 'MRI execution'. When every line is hit in the file / function, it records the variable states, I can know what are the callers, callees, their states. I can go back in time, visualize call stacks as frame graph with the parameters invoked.