How to Run Claude Code Tasks in True Parallelism Using Git Worktrees

Developers running multiple Claude Code tasks simultaneously in the same working directory face physical conflicts such as file read/write crashes, mixed build artifacts, and unintended cross-task changes. Using git worktree, each task can be assigned its own isolated working directory, preventing these collisions while sharing only the core .git object store. Claude Code only executes multiple agent calls in parallel when they are explicitly requested within a single message; splitting them across conversation turns forces serial execution. Automated cleanup of worktrees carries its own pitfalls, as naive merge-detection scripts can incorrectly delete branches with no commits yet, and squash merges cannot be reliably detected using git alone. Using GitHub PR merge status via the gh CLI is recommended as a more dependable source of truth for safe worktree deletion.