nix-shared/system/macos/yabai.nix

{ ... }:
{
  # Enable the Yabai Window Manager
  services.yabai = {
    enable = true;

    config = {
      # default layout (can be bsp, stack or float)
      layout = "bsp";

      # New window spawns to the right if vertical split, or bottom if horizontal split
      window_placement = "second_child";

      # padding set to 4px
      top_padding = "4";
      bottom_padding = "4";
      left_padding = "4";
      right_padding = "4";
      window_gap = "4";

      # center mouse on window with focus
      focus_follows_mouse = "autofocus";
      mouse_follows_focus = "off";

      # modifier for clicking and dragging with mouse
      mouse_modifier = "cmd";
      # set modifier + left-click drag to move window
      mouse_action1 = "move";
      # set modifier + right-click drag to resize window
      mouse_action2 = "resize";
    };
  };
}