Hi,I encounted a bug ,in which i can't build research labs when the habitat have a upgraded capital building ,so I dig a bit to find you forgot to add siho_capital_01_scripted_triggers_buildings.txt to common/scripted_triggers here is the code :
has_upgraded_capital = {
custom_tooltip = {
fail_text = "requires_building_hab_capital"
OR = {
NOT = { is_planet_class = pc_habitat }
has_building = building_hab_capital_regular
has_building = building_hab_major_hive
has_building = building_hab_capital_machine
has_building = building_hab_major_machine
has_building = building_hab_major_hive
has_building = building_hab_major_regular
has_building = building_hab_system_machine
has_building = building_hab_major_hive
has_building = building_hab_system_regular

}
}
}

has_major_upgraded_capital = {
custom_tooltip = {
fail_text = "requires_building_hab_major_capital"
OR = {
NOT = { is_planet_class = pc_habitat }
has_building = building_hab_major_machine
has_building = building_hab_major_hive
has_building = building_hab_major_regular
has_building = building_hab_system_machine
has_building = building_hab_system_regular
}
}
}

has_fully_upgraded_capital = {
custom_tooltip = {
fail_text = "requires_building_hab_major_capital"
OR = {
NOT = { is_planet_class = pc_habitat }
has_building = building_hab_system_machine
has_building = building_hab_major_hive
has_building = building_hab_system_regular
}
}
}

Thanks, for some reason I forgot about that and thought it was handled by a 'is_major' line in the capital building, which I also forgot to include. I'll have a patch that fixes this, and a bug with void dweller capital buildings, later today!

Capital/habitat admin buildings remain vanilla for the AI, breaking building upgrade paths if you capture the habitats yourself. May be a Gigastructures compatibility thing though.

Not sure if Gigastructures touches those files, but its possible. I don't know why it would be different between the AI and players though.