Yeah they usually are, I'm sure it's great because I add files more often than I ignore, but I need to be careful with the temporary files I write left and right in the repo dir during development.
If you check `jj status` regularly and/or use `jj split` to build up your commits (like `git add -p`) then you’ll notice. They might end up in your local repo (until a gc) at worst.
Also, this behavior (automatically tracking) is configurable. I thought I would hate it but I actually really like it.