Babysitting one process, but giving it all of my attention[1] can lead to rapid progress.

Pushing forward multiple efforts simultaneously can lead to rapid progress if code is largely unrelated and you keep a sharp eye on branching and commits.

However, it’s remarkably easy to make a mistake and be enamored by how well the AI can use git to fix your mistake.

But the cost ends up being adherence to it, specification or architecture, or being distracted into scope creep.

The new scope might be useful for factoring, but that is also the kind of thing that interfere with your Main processor trying to handle.

And it’s remarkably easy to get lost in the state when you have to manage validation well.

The more mature the project and more intense the expectation of scm hygiene, the more punitive small mistakes can become.

It is not really a problem in my process prior to Claude code, which was almost entirely turned based chat.

I still have configured fairly complex and detailed session workflows to preserve state amidst the regular threat of auto compact.

Even I even have documentation, describing a plan to migrate into git worktrees myself, but haven’t been able to justify the move, as I continue to learn to be productive with a single main session focus.

[1] I don’t know if there is such a thing as constant focus on a complex genetic programming effort because of the delays involved. You can stare at the funny verbs anthropic picks while the tokens go brrrr for only so long.

Yes, the bottleneck is going to still be human review. But with only a single Claude Code (or Cursor), I spent a lot of time (a couple minutes at a time) waiting for the agent to run through its loop completing what I asked it to do. In this time I found I was naturally switching context, but not always productively (checking slack, email, whatever). I called it "agent lag" time.

Now with these worktrees tools, I can easily bounce between tasks I have the agents working on during these natural lulls. Overall I'm able to get more done and spend my time more efficiently.

Also, Cursor has had the option to run multiple agents for a while (in tabs), but I always found it cumbersome because all the agents are operating on the same git checkout, so you have to take special care for them not to conflict with each other. Worktrees completely solve that problem.