diff --git a/sh/tmux.sh b/sh/tmux.sh
index 9d3777e..b15df86 100644
--- a/sh/tmux.sh
+++ b/sh/tmux.sh
@@ -2,24 +2,22 @@
 # │ tmux │
 # ╰──────╯
 
-# ╭──────┬─────────╮
-# │ tmux │ servers │
-# ╰──────┴─────────╯
-
-rwx_tmux_server() {
-	basename "${TMUX}" |
-		cut \
-		--delimiter "," \
-		--fields "1"
-}
-
 # ╭──────┬───────╮
 # │ tmux │ setup │
 # ╰──────┴───────╯
 
 rwx_tmux_setup() {
-	local file
+	local file script
 	file="${HOME}/.tmux.conf"
+	script="${HOME}/.tmux.sh"
+	rwx_file_write "${script}" "\
+rwx_tmux_server() {
+	basename \"\${TMUX}\" |
+		cut \\
+		--delimiter \",\" \\
+		--fields \"1\"
+}
+"
 	rwx_file_write "${file}" "\
 # ╭────────╮
 # │ option │
@@ -62,7 +60,7 @@ set-option -g set-titles on
 
 # set title to working directory
 set-option -g set-titles-string '\
-#(rwx_tmux_server)\
+#(sh -c \". ${script}; rwx_tmux_server\")\
  → \
 #{session_name}\
  → \