My one experience with Ultraplan has been not good. It took too long to figure out how to comment on the plan. The overall process feels sluggish to the point that I wonder "is this thing on?" I also don't understand the underlying mechanisms (when/how are files being shipped between my desktop Claude Code and Claude Code on the Web) which is not a feeling I like as a developer. I have thought about abandoning despite the slowness but I'm not sure what that would do.
Or just use Claude in VSCode with their plugin or Kilocode and you have nice IDE with as many tabs as you want open one click away?
Why not have the ability to start ultraplan from web?