The terminal plugin is what ao open and ao session attach use. If you only ever look at the dashboard, you don't need to think about it.
iTerm2Open attached tabs in iTerm2 via AppleScript (macOS only).WebDashboard xterm.js session URL. Cross-platform.
Default
AO picks iterm2 on macOS when iTerm2 is installed; falls back to web otherwise. You can pin the choice:
terminal: web