Planetary Building Capacity

Planetary Building Capacity limits how much you can build on a planet, scaled by two things: how big the planet is, and how far along you are in the game. Small or early-game worlds are tightly constrained; larger worlds and later-game tech ease the limit. It works on two fronts at once: visible, clearable blockers trim building slots, and a quiet penalty trims the district cap. Both ease on the same progression you unlock by researching and running an Infrastructural Densification project on the planet.