[diego898]

Thanks that makes sense - just feels weird to go from years of “be very careful rewriting history with git, especially at work” to jj rewriting everything all the time - can’t shake the feeling there’s a clash somewhere waiting to happen

[cube2222]

You can customize the immutable commits option to specify which commits you want to be blocked from changing.

By default that’s only the main branch and untracked remote branches. For me that makes sense as I’m generally fine with constantly rewriting my feature branches.

However, if you want it to e.g. block you from rewriting anything that you’ve already pushed to the remote, you can set it to treat anything that’s pushed to the remote as immutable, too, as another commenter described [0].

[0]: https://news.ycombinator.com/item?id=42940329

[gcr]

As long as you don't use `--allow-backward` or `--ignore-immutable`, and as long as everyone sticks to their own feature branches, this shouldn't be possible.

The operation log makes jj quite safe. There's a command to restore the entire working copy + history to an earlier state in case you screw something up. Even this operation log is itself versioned, so you can undo the undo if you screwed the undo up, ad infinitum. :)

[ashenke]

For every feature we usually have two developers working on it, one frontend and one backend, working on the same feature branch. Would Jujitsu cause a problem in this context?