Claude Code just dropped a hidden feature called Ultraplan. Instead of planning locally in your terminal, it sends your planning session to the cloud where multiple agents running Opus 4.6 work in parallel to build a much deeper, more structured plan. In this video, I break down how it works, run a side-by-side test building the same dashboard with local plan vs Ultraplan, and show you the speed and quality differences. I also dig into the technical details, including the multi-agent architecture, token usage, and what you need to know before trying it.