diff --git a/bin/omarchy-menu-keybindings b/bin/omarchy-menu-keybindings
index 78435e7693..314f7ddbe9 100755
--- a/bin/omarchy-menu-keybindings
+++ b/bin/omarchy-menu-keybindings
@@ -26,6 +26,10 @@ declare -A FALLBACK_KEYCODE_SYM_MAP=(
 # source-derived key cache so the menu can still show those bindings.
 declare -A LUA_BIND_KEY_MAP
 
+# Allow user-defined keybinding extensions
+USER_EXTENSIONS="$HOME/.config/omarchy/extensions/keybindings.sh"
+[[ -f $USER_EXTENSIONS ]] && source "$USER_EXTENSIONS"
+
 build_keymap_cache() {
   local keymap
   keymap="$(xkbcli compile-keymap)" || {
@@ -382,6 +386,7 @@ output_binding_records() {
   {
     dynamic_bindings
     static_bindings
+    [[ $(type -t user_bindings) == "function" ]] && user_bindings
   } |
     sort -u |
     parse_keycodes |
diff --git a/config/omarchy/extensions/keybindings.sh b/config/omarchy/extensions/keybindings.sh
new file mode 100644
index 0000000000..bffee86ba1
--- /dev/null
+++ b/config/omarchy/extensions/keybindings.sh
@@ -0,0 +1,17 @@
+# Add custom keybindings to the Omarchy keybindings menu (Super + K).
+# See $OMARCHY_PATH/bin/omarchy-menu-keybindings for the expected output format.
+#
+# $OMARCHY_PATH/bin/omarchy-menu-keybindings will invoke a user_bindings()
+# function in this file if present.
+#
+# Each line output by user_bindings() must be comma-separated:
+#   MODIFIERS,KEY,Description
+#
+# Example:
+# user_bindings() {
+#   echo ",prefix h,Tmux: split pane vertically"
+#   echo ",prefix v,Tmux: split pane horizontally"
+#   echo "ALT,1,Tmux: window 1"
+#   echo "CTRL ALT,Left,Tmux: navigate pane left"
+#   echo "ALT,1,Tmux: window 1"
+#   }