Opt a repository in

zap only removes worktrees in repositories that have a .zap file at their root. Everywhere else, zap clean shows what it would do and changes nothing.

cd ~/dev/new-app
zap init

The file starts with the defaults, so you don't need to edit it. Commit it:

git add .zap && git commit -m "Let zap clean merged worktrees"

Everyone on the repository then gets the same rules. To change them (which statuses count, how old a worktree must be, which branches are protected), see The .zap file.

You can also opt a repository in from the picker by pressing i.

Next: Your first clean