Git Worktrees — The Multi-Agent Solution

If the last lesson was the diagnosis, this lesson is the cure.

Git worktrees let you check out multiple branches of the same repository simultaneously, each in its own directory. One repository, multiple working directories, zero conflicts between them.

This is not some obscure feature or third-party tool. It's built into Git and has been since version 2.5. It's just one of those things that most developers never learn because they never needed it — until AI agents came along and made parallel development the norm.

This is arguably the most important lesson in this entire path. If you're going to work with multiple AI agents, worktrees are essential.

What Worktrees Are

Normally, a Git repository has one working directory. That's the directory where your files live, where you e