The parallel agent model is better for when you know the high level task you want to accomplish but the coding might take a long time. You can split it up in your head “we need to add this api to the api spec” “we need to add this thing to the controller layer” etc. and then you use parallel agents to edit just the specific files you’re working on.

So instead of interactively making one agent do a large task you make small agents do the coding while you focus on the design.