This is a really cute idea. Nice job. I might have to do similar for my Rust projects. I wonder if they'd support overlay templates so you could add action workflows for various languages
If this doesn't include the BBC Micro start up sound (youtube.com/watch?v=Nd9MzxIbโฆ) at least somewhere then it's not an acceptable device and should be banned.
I tend to try for the absolute simplest thing i can in a fuzzer wrapper and the problem with a delimiter is you're saying that the delimiter will therefore never show up in the first input since by definition when you encounter it you switch to the second input.