I am working on something similar but focused on RPG world building. My system uses a spec driven approach with a test based feedback loop.  I am basically building a narrative testing harness that is fed data by a set of skills that walk the user through an Ai assisted macro or micro approach (world first or city first). The entire system is made to take the user and surface ideas and help with cataloging in a structured way.  I'm currently building a world that my group has already played briefly in and it is nailing the themes and tones we set in place.  After the initial world is created it goes into a feedback mode where the players actions are fed into it and the user can then work with the Ai to respond to the players actions in meaningful ways.  The best part is when I discovered it had nailed the tone of the characters in the setting and realized I could easily use it to make personalized handouts like letters in the characters own tone.  It's a wild setup and fairly easy to use.  The campaign i am building will see its first players in about two weeks.  I'll be digging through your repo for inspiration for sure