Claude Code Git Worktree Setup: Run Multiple Agents in Parallel

Running multiple AI coding agents in parallel often leads to resource contention, including file overwrites, database locks, and test suite collisions. A robust three-part isolation strategy resolves these conflicts by utilizing Git Worktrees, symbolic links, and environment-specific databases. Git Worktrees allow developers to check out multiple branches into separate directories simultaneously without redundant cloning. To maintain configuration consistency across these directories, symbolic links (symlinks) connect the Worktrees to shared sensitive files like `.env` or master keys, ensuring updates propagate globally. Furthermore, assigning unique database names via environment variables for each Worktree prevents agents from interfering with each other's migrations or test data. Automating this workflow with a custom script and a `.worktreeinclude` file enables the rapid deployment of fully isolated environments, allowing multiple instances of Claude Code to resolve bugs and build features concurrently without manual overhead.