Ephemeral File Systems for AI Coding Agents: Git Worktrees, Rootless OverlayFS, and Copy-on-Write Isolation
Autonomous AI coding agents frequently execute arbitrary shell commands, modify source code, install third-party dependencies, and run test suites. Granting an unconstrained agent direct write access to a developer's active working tree creates immediate operational hazards: accidental destruction of untracked files, workspace corruption from speculative refactoring, and state leaks across parallel tasks. Heavyweight virtualization solutions like full virtual machines or freshly initialized con
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