form_brunei_kingdom_decision_scripted_effect

form_brunei_kingdom_decision_scripted_effect = {
	save_scope_as = founder
	create_title_and_vassal_change = {
		type = created
		save_scope_as = title_change
		add_claim_on_loss = no
	}
	title:k_brunei = {
		change_title_holder = {
			holder = root
			change = scope:title_change
		}
	}
	resolve_title_and_vassal_change = scope:title_change
	dynasty = {
		add_dynasty_prestige = massive_dynasty_prestige_gain
	}

	hidden_effect = {
		title:k_brunei = { save_scope_as = brunei_kingdom }
		title:d_BOR_barune = { save_scope_as = barune_duchy }
		title:d_BOR_santubong = { save_scope_as = santubong_duchy }
		title:c_BOR_berau = { save_scope_as = berau_county }

		title:d_BOR_barune = { set_de_jure_liege_title = title:k_brunei }
		title:d_BOR_santubong = { set_de_jure_liege_title = title:k_brunei }
		title:c_BOR_berau = { set_de_jure_liege_title = title:d_BOR_barune }
	}
	custom_tooltip = form_brunei_kingdom_decision_effects_de_jure_tt_a
	custom_tooltip = form_brunei_kingdom_decision_effects_de_jure_tt_b
	custom_tooltip = form_brunei_kingdom_decision_empire_unlock
}

As written in game/common/scripted_effects/00_major_decisions_scripted_effects.txt.