I wrote a trace viewer to collapse/traverse the inputs format I get by using trace f for debugging my programs post hoc. I haven't pushed the code into a public repository yet, but it's all self-contained in the HTML page below.
https://www.alperenkeles.com/debugger.html
If anyone has any ideas such as X already exists, why not use that , or you could add Y to make this more useful , I would love to hear them