ai_should_focus_on_building_in_their_capital

ai_should_focus_on_building_in_their_capital = {
	is_landed = yes
	highest_held_title_tier >= tier_county
	NOT = { has_variable = conqueror }
	NOT = { government_has_flag = government_is_nomadic }
	exists = capital_county
	exists = culture
	OR = {
		capital_county.title_province.free_building_slots > 0
		AND = {
			culture = { has_innovation = innovation_ledger }
			capital_county.title_province.combined_building_level <= 4
		}
		AND = {
			culture = { has_innovation = innovation_baliffs }
			capital_county.title_province.combined_building_level <= 6
		}
		AND = {
			culture = { has_innovation = innovation_guilds }
			capital_county.title_province.combined_building_level <= 9
		}
		AND = {
			culture = { has_innovation = innovation_cranes }
			capital_county.title_province.combined_building_level <= 12
		}
	}
}

As written in game/common/scripted_triggers/00_ai_value_triggers.txt.