Usually when I'm working in one part of the codebase and I have sample data or something at a specific path on my local machine and Im testing the same thing over and over again will I make a Makefile or something and info/exclude it to help me keep focused. That's one way I use it.
I use git worktrees pretty heavily in my own workflows (I worked like an AI agent before AI agents made worktrees cool). I like to track my ephemera/utility scripts in git, so what I do is keep a private ephemera repo for those, and then use `git worktree add` from the collaborative repo to check out the branch I'm working on there into a subdirectory of my ephemera repo.
git-home/
company-project/ <-- git repo with main checked out
ephemera/ <-- my private repo
my-data-script.py
work/ <-- gitignored
company-project-feature-X/ <-- worktree on feature-X branch
company-project-feature-Y/ <-- worktree on feature-Y branch
This way, too, I can easily use the same ephemera scripts across multiple branches, or even multiple repos, concurrently.
How do you manage the lifecycle of the worktrees in practice? Is it mostly manual git worktree add/remove, or do you use aliases/scripts/some other tools?