Focus

yabai has stack.next (only inside a stack) and directions (only from tile to tile, landing on a stack's top window), but nothing that does both. yabar focus does, the way i3 moves through tabbed and stacked containers:

yabar focus west|east|north|south
		

• Along a stack's axis the keys step through its windows. Past the first or last one they move to the neighbouring tile, and with no tile that way, to the neighbouring display.
• Across the axis they go straight to the neighbouring tile.
• The axis follows the indicators: tabs along the top or bottom run west to east; indicators down a side (or none) run north to south. --axis horizontal|vertical fixes it for every stack.
• Moving back into a stack lands on the window you left, remembered between key presses.

yabar focus next|prev
		

walks every window of the space instead, in yabai's order, each stack's windows in turn, wrapping round.

yabar focus attention
		

goes to the next window, on any space, that wants attention.