Option+O used to cycle tmux's built-in layouts. It now runs a smart-layout
script that scores even-horizontal, even-vertical, and tiled by how close
each one puts the per-pane aspect to a 2:1 cell target (roughly square in
pixels) and applies the winner. A wide window with four panes becomes a
single horizontal row instead of a squished 2x2; a tall narrow window
becomes a vertical stack. The old layout-cycling behavior is preserved on
Option+P for anyone who wants to hand-pick.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Shawn Pana