Yeah I regularly have 5+ agents working in 1 repo simultaneously even modifying the same file. Since they were all running on my singular local machine. Builds and tests were interfering at 1 point so 1 automatically proposed writing a single script that basically mutex locked it with appropriate wait and timeouts. It had even added this to my own personal agentic todo backlog. They've proposed new skills for me.

They even have split my decisions to human decisions. Proposed and approved work. They can iterate on approved work without me just fine.

And I only just started with agentic coding in last few weeks before that I was mostly a copy paste chat person.