Most engineers I talk to are somewhere between level 2 and level 4.
They have an agent in their IDE. They review the diffs. They're careful — and that's a reasonable place to be.
But level 6 looks completely different. You're running multiple agents at once. You're steering the work, not writing it. Reading summaries, not diffs.
And level 8? You've built your own orchestrator. Claude Code runs Claude Code.
The gap between level 3 and level 6 isn't time. It's a mindset shift about what engineering actually means.