Personal patches for yabai. Cherry-pick them to your own fork if you want to use them:

• Revert removal of window borders
• Upgrade IPC from unix sockets to mach messages
• Window borders are drawn half inside and half outside the window to avoid gaps
• Animation fade for smoother animations
• Allow only one child at a time to zoom to parent node
• Zoomed windows occlude windows below in the next-window-in-direction calculation
• Focus closest window on application termination
• Focus sibling window node on window destruction
• Auto Padding for ultrawide displays, only applies to displays with aspect ratio greater than auto_padding_min_aspect and tries to achieve a width of auto_padding_width and a height of auto_padding_height for any window (except when there is only one window, then it will try to make the window 2*auto_padding_width). Fullscreen zoom will make the window zoom to use the full screen area. These are the defaults:

yabai -m config auto_padding off
yabai -m config auto_padding_min_aspect 2.33
yabai -m config auto_padding_width 840
yabai -m config auto_padding_height 1200