tuicr is an interactive code review tool, providing a portion of the
Github experience in a TUI. And, most importantly it has Vi-ish
keybindings.

* GitHub-style continuous diff in the terminal. Scroll through every
  changed file in one stream.
* PR-style comments at the line, range, file, and review level.
* Review tracking at file or hunk granularity, persisted across
  sessions.
* Three export targets: push a real review to GitHub, GitLab, or
  Bitbucket; copy structured markdown to your clipboard; or pipe to
  stdout.
* Works with git, jj, and mercurial. Reviews uncommitted changes,
  commit ranges, or any GitHub PR, GitLab MR, or Bitbucket PR.