Resolve conflicted files with an external merge tool. More information: https://jj-vcs.github.io/jj/latest/cli-reference/#jj-resolve.
jj resolve
jj resolve {{[-l|--list]}}
jj resolve {{[-r|--revision]}} {{revset}}
jj resolve {{file1 file2 ...}}
jj resolve --tool :theirs
jj resolve --tool :ours