Quarters 0.6.0

• Split panes, as in iTerm: ⌘D opens a shell beside the tab you're in, ⇧⌘D
  one below it, and splits nest. ⌘[ and ⌘] move between panes, ⌘W closes
  just the pane (and a pane whose shell exits closes by itself), and drag
  the line between two panes to resize them (double-click to make them
  equal). A reloaded window, or another device, shows the panes the same
  way.
• A files panel (⇧⌘E, or the folder button in the title bar, which glows
  while it's open): the project's folders and files, with git's marks
  (changed, new, ignored) and a filter that finds any file. Click a file
  to open it in an editor tab beside the terminals: syntax colours,
  search, ⌘S to save. An agent's edit shows up by itself, and a save never
  overwrites one made since you opened the file: you choose to reload or
  keep yours. Right-click a file to copy its path, type it in the terminal
  or show it in Finder. Files that may hold keys or passwords (.env,
  *.pem…) are never opened.
• Tips for the first week: now and then, one quiet line at the bottom
  right about a key or a panel you haven't used yet (one you have never
  shows). At most three a day; › shows another, × turns them off, and
  Settings turns them back on.
• The fold arrows in the side panel line up with their headings.