> you are opting in to a pretty huge stack that is just Agent Substrate, that is their runners, their harness, their substrate

The website makes me think the contrary: It is described as “low opinion” and explicitly mentions that the running tasks don’t even have to be AI agents. Can you explain in what ways you’re more locked in than the website suggests?

Scion at the same time talks much more about concrete agents, giving me the opposite initial impression.