Last I checked with every other high level language, you save the source and then rerun the compiler to generate the artifact.
With LLMs you throw away the 'source' and save the artifact.
There are now approaches were the prompt itself is being structured in a way (sort of like a spec) so you get to a similar result quicker. Not sure how well those work (I actually assume they suck, but I have not tried them).
Also some frameworks, templates and so on, provide a bunch of structured markdown files that nudges LLM assistance to avoid common issues and do things in a certain way.