From the README:
> Detect the danger window. When the main lineage goes idle and a subagent is actively running, the main prefix is at risk of expiring.
So, this is not demanding to be at the front of the queue, it's just paying someone to take the place you already had in the queue, when you want to take a leak.
A subagent running doesn't mean that much, though. I often walk away while the subagents are chewing.
The defaults seem sensible. This isn't keep-alive-forever by default solution.