Default autoscaling empty duration to fifteen minutes

docs/guides/autoscaling.md

@@ -8,7 +8,7 @@ T5 game-wide policies cover the ten standard Zombies maps. Dead Ops Arcade is no
 
 ## Configure a policy
 
-Choose **Add policy**, select the game and scope, and enter an explicit maximum. The initial editor selects Off, with a minimum of one running lobby, one empty spare, and a 20-minute empty interval. Counts must be between 1 and 20; the minimum and spare target cannot exceed the maximum.
+Choose **Add policy**, select the game and scope, and enter an explicit maximum. The initial editor selects Off, with a minimum of one running lobby, one empty spare, and a 15-minute empty interval. Counts must be between 1 and 20; the minimum and spare target cannot exceed the maximum.
 
 Choose **Preview changes** to inspect the existing lobbies, game key availability, target, proposed action, and blockers. **Save reviewed policy** checks the policy revision and current fleet again. If the preview changed, review a new preview before saving.
 

docs/plans/lobby-autoscaling-plan.md

@@ -37,7 +37,7 @@ Use one policy per `(game, mapSlug)`, preserving configured variants such as T6
 | Minimum running lobbies | Default 1; a floor for desired ready capacity, subject to available keys and host capacity. |
 | Maximum lobbies | Required explicit limit, at most 20. Count occupied lobbies, registered identities, reservations, and unresolved creations toward admission. |
 | Empty spare target | Default 1. Count empty ready lobbies, not unfilled player slots. |
-| Empty duration before removal | Default 20 minutes; adjustable after the pilot. |
+| Empty duration before removal | Default 15 minutes; adjustable after the pilot. |
 | Action cooldown | Default 5 minutes between new policy actions, measured from durable admission. Cancellation and safety checks do not wait for cooldown. |
 | Launch settings | Reuse normal map recipes and automatic placement on eligible active hosts. Use current promoted files when provisioning begins. |