Originally published on AI Tech Connect.
What you need to know Coding agents got good enough in 2025–26 that the bottleneck moved: the limiting factor is no longer how fast one agent works, but how many an engineer can supervise at once. The naive way to run two agents — two terminal tabs in the same checkout — fails immediately, because both agents edit the same files, fight over the same git index and trip over each other's half-finished changes. The fix operates at the filesystem level, and Git has shipped it natively since version 2.5 in July 2015: git worktree. A worktree is an additional working directory attached to the same repository. Each worktree has its own checked-out files, its own HEAD and its own staging area, while sharing one object database, one set of branches and one config with the main checkout. Creating…
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