> the preferred form of the work to making modifications to it

Implies what you point to when you want to know where to make changes.

That wouldn't be a prompt - you might use a prompt to make changes, but the thing you're making changes to, certainly at present, is your java/python/rust++ /whatever codebase.

Lots of projects, even fully vibecodes ones, don't push and include prompts in their repos. But they all push the java code (sticking with java as an example for the sake of argument).

I can't imagine that working on a project where the java code is omitted, and people make changes to the software just by editing the prompts would go well. It's an interesting thought experiment, but I think you'd find it very hard to work on any kind of team where that was the practice.