contract_passive_spawn_effect

contract_passive_spawn_effect = {
	#count how many contracts you already have
	every_character_task_contract = {
		add_to_list = num_of_contracts_before
	}
	# G'is a contract.
	populate_location_with_contracts_effect = {
		AREA_CHAR = root
		AMOUNT = $SPAWN_CONTRACTS$
	}
	#count them again to see if the effect above spawned something
	every_character_task_contract = {
		add_to_list = num_of_contracts_after
	}
	set_local_variable = {
		name = current_value
		value = list_size:num_of_contracts_before
	}
	# Make sure we don't get too many of them just sitting in one place.
	while = {
		limit = {
			local_var:current_value < list_size:num_of_contracts_after
		}
		increment_variable_effect = {
			VAR = contract_passive_spawn_tally
			VAL = 1
		}
		change_local_variable = {
			name = current_value
			add = 1
		}
	}
}

As written in game/common/scripted_effects/07_dlc_ep3_scripted_effects.txt.