Fish shell

Completions

For setting up basic completions, see https://martinvonz.github.io/jj/latest/install-and-setup/#command-line-completion

For more dynamic completions (e.g. branch names), you can try out this additional completion script: https://gist.github.com/bnjmnt4n/9f47082b8b6e6ed2b2a805a1516090c8