I would love a shell that allows you to “run” a script in manual mode - Where at the end of every command, every statement, it prints what the next command will be with all variables expanded or otherwise called out, and then requires you to hit “enter” to cause it to proceed. I write a decent amount something between README and Shell Script. I’ve already got an awk one-liner that parses the shell out of Markdown. I typically copy+paste, line-by-line, from my README and add a bunch of echo statements to verify what i’m doing.