It’s provocative to claim that prompts are more like code than like data. Feels to me more like they sit in that gray area alongside things like HTML, config files, regular expressions, and spreadsheets.
In practical terms the more pressing question is what kind of tools are needed to manage prompt bits. Is it beneficial to manage prompts using traditional software engineering tooling? This post says yes. Maybe, but I can see traditional data management tooling being equally applicable.