A: Yes, use event giga_ship.1 to trigger the build event for a Systemcraft constructor. If you are looking to truly master the mod, I can: List the tech IDs for every single gigastructure.
This is the core of the guide. The Gigastructural Engineering mod introduces unique event IDs and effects that allow you to bypass the normal construction process entirely. stellaris gigastructural engineering console commands link
# First, select a barren planet (or any uninhabitable) planet_class pc_matrioshka_core A: Yes, use event giga_ship
Gigastructural Engineering is a massive mod (literally 10,000+ lines of code). stellaris gigastructural engineering console commands link
For those interested in exploring more console commands and megastructural engineering possibilities in Stellaris, here are some helpful links:
add_ship AttackMoon