diff --git a/data/scripts/o b/data/scripts/o
index 79dcbbd..19223cf 100755
--- a/data/scripts/o
+++ b/data/scripts/o
@@ -360,36 +360,45 @@ cmd_tui() {
     tmux kill-session -t "$tmux_session" 2>/dev/null || true
 
     # Layout:
-    # ┌──────────────────────┬──────────┐
-    # │                      │ state    │
-    # │  chat (75%)          │ (25%)    │
-    # │                      ├──────────┤
-    # │                      │ shell    │
-    # ├──────────────────────┴──────────┤
-    # │  prompt (20%)                   │
-    # └─────────────────────────────────┘
+    # ┌──────────────────────────────────┐
+    # │  chat                            │
+    # │                                  │
+    # ├──────────────────────────────────┤
+    # │  prompt (20%)                    │
+    # └──────────────────────────────────┘
+    # State shown in tmux status-right.
 
-    # Pane 0: chat (left, large)
+    # Pane 0: chat (top, 80%)
     tmux new-session -d -s "$tmux_session" -c "$HOME" \
         -e "session=$s" -e "agent=$a"
     tmux send-keys -t "$tmux_session" "o tail | grep -v '\\[\\[\\[.*\\]\\]\\]'" Enter
 
-    # Pane 1: state monitor (right column, 25% width)
-    tmux split-window -t "$tmux_session" -h -l 25% \
-        -e "session=$s" -e "agent=$a"
-    tmux send-keys -t "$tmux_session" "o readloop statewait" Enter
-
-    # Pane 2: shell (bottom of right column, 50% of right)
-    tmux split-window -t "$tmux_session" -v -l 50% \
-        -e "session=$s" -e "agent=$a"
-
-    # Pane 3: prompt REPL (bottom, 20% height, spans full width)
-    tmux split-window -t "$tmux_session:0.0" -v -l 20% \
+    # Pane 1: prompt REPL (bottom, 20% height)
+    tmux split-window -t "$tmux_session" -v -l 20% \
         -e "session=$s" -e "agent=$a"
     tmux send-keys -t "$tmux_session" "o prompt" Enter
 
+    # Show agent state in tmux status bar (live updates via statewait)
+    tmux set-option -t "$tmux_session" status-right "starting... | %H:%M"
+    tmux set-option -t "$tmux_session" status-right-length 64
+    # Background: loops on statewait, updates status bar instantly on each change
+    while true; do
+        ollie-9p read "session/$s/agent/$a/statewait" 2>/dev/null | while read -r state; do
+            bg=""
+            case "$state" in
+                idle)    bg="colour70" ;;    # green
+                calling*) bg="colour214" ;;  # orange
+                thinking) bg="colour33" ;;   # blue
+                paused)  bg="colour245" ;;   # gray
+                *)       bg="default" ;;
+            esac
+            tmux set-option -t "$tmux_session" status-right-style "fg=default,bg=$bg"
+            tmux set-option -t "$tmux_session" status-right "$state | %H:%M"
+        done
+    done &
+
     # Focus the prompt pane
-    tmux select-pane -t "$tmux_session:0.3"
+    tmux select-pane -t "$tmux_session:0.1"
 
     exec tmux attach -t "$tmux_session"
 }