In Shadowrun, spirits are used for services and every net hit you get from your summoning roll allows you 1 service. The 3 (clearly) described are Loaned, Magical and Remote services. There's a small paragraph explaining how you can use the spirit for a physical services but it 's not clear on how they are "measured".
A continous task count as 1 service. So if I summon an air element to dust a building it would count as 1 service correct?
Would a fight count as a single service? The whole duration of the encounter would be 1 service? Do I (the summoner) control the Spirit's actions in combat or is it my GM's role and the spirit fights the best it can?