By learning to parallelize my work. This also solved my problem with slow Xcode builds.

Well you can’t edit files while Xcode is building or the compiler will throw up, so I‘m wondering what you mean here. You can’t even run swift test in 2 agents at the same time, because swift serializes access for some reason.

Whenever I have more than 1 agent run Swift tests in a loop to fix things, and another one to build something, the latter will disturb the former and I need to cancel.

And then there’s a lot of work that can’t be parallelized, like complex git rebases - well you can do other things in a worktree, but good luck merging that after you‘ve changed everything in the repo. Codex is really really bad at git.