This is pretty crazy, literally built something almost exactly like this for a project I'm working on (a local-first AI agent that does work on folders while you sleep). Basically going from JSON "Lego blocks" to full reports (including charting, though a subset of what Flint offers). And with post-generation validation and retry steps.

Functions extremely well and the result is a very clear (and consitent) human-readable "output layer." Cool idea, fun to see people converging on similar concepts in the space.