I've been using https://github.com/choplin/code-review.nvim, which looks like a similar UI, but in the NeoVim interface. `<leader>rc` to comment on a line/selection, then `<leader>ry` to yank all comments into the clipboard to be pasted into a chat.

It leaves the comments as markdown files in ./.code-review, so I also have my `/review` agent set to output in the same format, so an LLM can be reviewing the same code I am, I can edit or dismiss the LLM's reviews, then send the whole thing back to the first agent to fix.