Git worktree: one repo, many working directories

This article addresses the challenge of working on multiple branches simultaneously in a single Git repository, such as when using AI coding agents for parallel tasks. It explains how Git normally works, with one working directory tied to one branch, and the problem of file overwrites when switching branches. The solution is `git worktree`, which creates multiple working directories linked to the same `.git` repository, each with its own branch, HEAD, and staging area. The article details the setup, underlying mechanism (a `.git` file pointing to the main repo), and benefits like instant commit visibility across worktrees. It's a practical guide for developers needing concurrent branch work.