Fix #9355

docs/changelog.rst

@@ -171,6 +171,9 @@ Detailed list of changes
 - ncurses: Fix ncurses not using dim because it is missing from the sgr property
   in terminfo even though it is present in the dim property.
 
+- Fix a regression in the previous release that caused moving between neighbors
+  in the vertical and horizontal layouts to go in the opposite direction (:iss:`9355`)
+
 
 0.45.0 [2025-12-24]
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

kitty/layout/vertical.py

@@ -129,8 +129,8 @@ class Vertical(Layout):
         idx = groups.index(wg)
         lg = len(groups)
         if lg > 1:
-            before = [groups[(idx - 1 + lg) % lg].id]
-            after = [groups[(idx + 1) % lg].id]
+            after = [groups[(idx - 1 + lg) % lg].id]
+            before = [groups[(idx + 1) % lg].id]
         else:
             before, after = [], []
         ans: NeighborsMap = {}