not sure if the hz file artifact is needed, you can enter pseudocode directly into chat or even on an existing code file and with minor comment agents will be able to work with it. i write this type of pseudocode to existing code files often to great results.
Yes, I also wrote this kind of pseudocode. But to make full use of it, you'd want to persist it, and to maintain a map between the lines of your pseudocode and the lines of your real code. It's not practical to do this manually, you'd want these mechanics built into your editing system.