diff --git a/data/scripts/o b/data/scripts/o
index c1abea8..05916a1 100755
--- a/data/scripts/o
+++ b/data/scripts/o
@@ -400,25 +400,24 @@ cmd_tui() {
 
     # Check for subcommands
     if [[ "${1:-}" == "exit" ]]; then
-        # Use = prefix for exact match (prevents dot interpretation as window.pane)
-        tmux kill-session -t "=${tmux_session}" 2>/dev/null && echo "[killed ${tmux_session}]" || echo "no tui session: ${tmux_session}"
+        tmux kill-session -t "${tmux_session}" 2>/dev/null && echo "[killed ${tmux_session}]" || echo "no tui session: ${tmux_session}"
         return
     fi
 
-    tmux kill-session -t "=${tmux_session}" 2>/dev/null || true
+    tmux kill-session -t "${tmux_session}" 2>/dev/null || true
 
     # Layout: chat (top 80%), prompt (bottom 20%)
     # Use colon separator in o commands to handle session names with slashes
     local ctx="$s:$a"
     tmux new-session -d -s "$tmux_session" -c "$HOME"
-    tmux set-option -g mouse on
-    tmux send-keys -t "=${tmux_session}" "o '$ctx' log -n 1000 | grep -v '\\[\\[\\[.*\\]\\]\\]' | grep -v '^\`\`\`'; o '$ctx' read chat" Enter
+    tmux set-option -t "$tmux_session" mouse on
+    tmux send-keys -t "$tmux_session" "o '$ctx' log -n 1000 | grep -v '\\[\\[\\[.*\\]\\]\\]' | grep -v '^\`\`\`'; o '$ctx' read chat" Enter
 
-    tmux split-window -t "=${tmux_session}" -v -l 20%
-    tmux send-keys -t "=${tmux_session}" "clear; o '$ctx' prompt" Enter
+    tmux split-window -t "$tmux_session" -v -l 20%
+    tmux send-keys -t "$tmux_session" "clear; o '$ctx' prompt" Enter
 
-    tmux set-option -t "=${tmux_session}" status-right "starting... | %H:%M"
-    tmux set-option -t "=${tmux_session}" status-right-length 64
+    tmux set-option -t "$tmux_session" status-right "starting... | %H:%M"
+    tmux set-option -t "$tmux_session" status-right-length 64
 
     # Subscribe to state events for this agent only
     echo "session.${s}.agent.${a}.state" | ollie-9p rdwrs event 2>/dev/null | while read -r topic state; do
@@ -430,15 +429,15 @@ cmd_tui() {
             paused)  bg="colour245" ;;
             *)       bg="default" ;;
         esac
-        tmux set-option -t "=${tmux_session}" status-right-style "fg=default,bg=$bg" 2>/dev/null
+        tmux set-option -t "$tmux_session" status-right-style "fg=default,bg=$bg" 2>/dev/null
         status=$(ollie-9p read "${PREFIX}/status" 2>/dev/null | head -n1)
-        tmux set-option -t "=${tmux_session}" status-right "${status:-$state} | %H:%M" 2>/dev/null
+        tmux set-option -t "$tmux_session" status-right "${status:-$state} | %H:%M" 2>/dev/null
     done &
     local bg_pid=$!
     trap "kill $bg_pid 2>/dev/null" EXIT
 
-    tmux select-pane -t "=${tmux_session}:0.1"
-    exec tmux attach -t "=${tmux_session}"
+    tmux select-pane -t "${tmux_session}:0.1"
+    exec tmux attach -t "$tmux_session"
 }
 
 cmd_env() {