Git worktrees are evolving from a niche feature into an essential primitive for agent-assisted development. They provide filesystem-level parallelism, allowing agentic coding tools to operate concurrently on separate branches, builds, or refactors without sharing a mutable working directory. Why Worktrees Matter Now Modern AI Coding Assistants are becoming increasingly autonomous. They don’t just suggest completions; they execute multi-step plans, run terminal commands, modify multiple files, and orchestrate entire workflows. This autonomy creates a new problem: mutable state collision. When you have multiple AI agents (or one agent handling multiple tasks), they all want to: Without isolation, these operations interfere with each other and with your own work. Git worktrees solve…