https://dev.to/ciembor/brunch-gem-isolated-development-environments-for-git-branches-and-worktrees-4n38

Brunch is a Ruby gem that gives Git branches and worktrees isolated development environments. Each branch can have its own containers, network, volumes, and persistent state, while each worktree gets its own host port. This makes it easier to switch between branches safely and to run multiple worktrees in parallel, including workflows driven by IDEs and coding agents.