It could all be done with Claude Code and tools. But it 'just works' and has done all the plumbing for you. The built-in memory systems help too, but again that can be done with Claude Code or others. I think this is just a step in the pre-build systems that work how you want instead of having to work through every bit yourself. I'm sure the big boys are working on more polished offerings that will be cleaner. The Open AI Codex app that just came out today for example.