What‘s relevant then? We still put the code in version control, not the shitty prompts that made it.

Correct, but I increasingly find that the version control is just a storage for code and a place to trigger CI/CD from.

Edit: ...and that the source code is useful in retaining enough context of the problem being solved. So, most people will not store the prompts, trusting that the source code provides context for the next iteration.