I've been a huge fan of BGBye for a while now - it was a pleasant surprise to find that a programmer I respect so highly is also "The Enemy" in the competition to make the best free / open licensed plotting tool for fiction writers!
That's partially in jest. PlotBunni's use of AI is wildly different from ours with StoryCAD, so we're kind of apples and oranges, since you (Fyrean) have got AI focusing on text and we're using it more to focus on making suggestions related to plot structure.
Anyway, massive props. I played around with structuring a story, churning the AI over a few times, messing with the export function and the UI theming... good work here! I'm obviously biased towards what we're doing over at storybuilder dot org (and welcome you to check it out, for Opposition Research if nothing else), but I have to admit to being jealous of PlotBunni's theming flexibility and how easy it makes API integration look. 5 Stars.