I understand your point but I basically find myself running all my agents in barebones containers and they’re basically short-run make-or-kill types. And once we ramp up agent counts, possibly into the thousands, that could add up rapidly. Of course, you would run milestone tests on actual container/envs but I think there might be a need for lighter solutions for rapid agent dev runs.

There are now many solutions, and full-blown startups, under the "swarm", "agent orchestration" and other similar keywords, for spinning agents in the cloud. I'm not sure if that's what you mean, but I totally see most of vibe coding being replaced by powerhouse agents, placed locally or in the cloud, picking up tasks and working them out until its really done.

You do realize that there is virtually no overhead in running containers, right? That's the entire point of their existence. They're just processes, with specific permissions (to generalize it). Your computer can run thousands of processes without sweating.