Unlocked Building Slots
Simply unlocks all building slots immediately. No extra technologies, no unnecessary requirements, no changes to districts, and so forth.
Should be compatible with anything including any of the building slots mods (second screenshot showing 108 slot mod). Literally makes a single line adjustment that affects all planets without any overwriting of districts or techs. This should not break anything as a result.
This is save game compatible so will take affect immediately whether it’s a new game or old. Not achievement compatible.