diff --git a/rc/tmux.kak b/rc/tmux.kak
new file mode 100644
index 00000000..6d243ff5
--- /dev/null
+++ b/rc/tmux.kak
@@ -0,0 +1,71 @@
+# http://tmux.github.io/
+# ‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
+
+## Can be one of "horizontal", "vertical" or "window"
+## When a new client is created, an horizontal pane, a vertical pane or a window will respectively be made
+decl str tmux_default_direction "horizontal"
+
+## The default behaviour for the `new` command is to open an horizontal pane in a tmux session
+hook global KakBegin .* %{
+    %sh{
+        if [ -n "$TMUX" ]; then
+            tmuxcmd=""
+
+            case "${kak_opt_tmux_default_direction}" in
+                vertical) tmuxcmd="tmux split-window -v";;
+                window) tmuxcmd="tmux new-window";;
+                horizontal) tmuxcmd="tmux split-window -h";;
+                *) echo "invalid value: ${kak_opt_tmux_default_direction}" >&2;;
+            esac
+
+            if [ -n "${tmuxcmd}" ]; then
+                echo "set global termcmd '${tmuxcmd}'"
+            fi
+
+            echo "alias global focus focus-tmux"
+        fi
+    }
+}
+
+## Temporarily override the default client creation command
+def -hidden -shell-params tmux_override_termcmd %{
+    %sh{
+        if [ -z "$TMUX" ]; then
+            echo "echo -color Error This command is only available in a tmux session"
+        else
+            readonly cmd_override="$1"
+            readonly termcmd="${kak_opt_termcmd}"
+
+            shift
+            echo "
+                set current termcmd '${cmd_override}'
+                eval new $@
+                set current termcmd '${termcmd}'
+            "
+        fi
+    }
+}
+
+def tmux-new-vertical -shell-params -command-completion -docstring "Create a new vertical pane in tmux" %{
+    %sh{
+        echo "eval %{tmux_override_termcmd 'tmux split-window -v' $@}"
+    }
+}
+
+def tmux-new-horizontal -shell-params -command-completion -docstring "Create a new horizontal pane in tmux" %{
+    %sh{
+        echo "eval %{tmux_override_termcmd 'tmux split-window -h' $@}"
+    }
+}
+
+def -docstring "focus given client" \
+    -shell-params -client-completion \
+    focus-tmux %{ %sh{
+    if [ $# -gt 1 ]; then
+        echo "echo -color Error 'too many arguments, use focus [client]'"
+    elif [ $# -eq 1 ]; then
+        echo "eval -client '$1' focus"
+    elif [ -n "${kak_client_env_TMUX}" ]; then
+        TMUX="${kak_client_env_TMUX}" tmux select-pane -t "${kak_client_env_TMUX_PANE}" > /dev/null
+    fi
+} }