I guess I fall under level 3 (2?): I typically have 3-6 agents working simultaneously on the same feature, they each make worktrees, code, run tests and put up PR’s. I also have Github actions which scan for regressions and security issues on each PR.
It makes my development cycle extremely fast: I request a feature and just look at Github and look for changes to my human readable outputs, settle on a PR, merge, repeat.
The issue is that I am now the bottleneck in my system. I find myself working basically non-stop, because there is always more to do. (Yes I know I can automate the acceptance criteria but that turns to slop real fast)