I wasn’t exactly suggesting this. The source code (including SVG or DOCX or HTMl+JS for document work) is the primary ground truth which the LLM modifies. Humans might modify it too. This ground truth is then rendered (compiled, visualized) to the end product.

The PROMPTS.md is communication metadata. Indeed, if you fed the same series of prompts freshly, the resultant ground truths might not make sense because of the stochastic nature of LLMs.

Maybe “ground truth” isn’t exactly the right word, but it is the consistent, determined basis which formed from past work and will evolve with future work.

It's more noise than signal because it's disorganized, and hard to glean value from it (speaking from experience).