Minimize fzf prompt size while centering it

agent-cmd.sh

@@ -6,18 +6,28 @@ agents=()
 command -v claude &>/dev/null && agents+=(claude)
 command -v opencode &>/dev/null && agents+=(opencode)
 command -v gemini &>/dev/null && agents+=(gemini)
-command -v codex &>/dev/null && agents+=(gemini)
+command -v codex &>/dev/null && agents+=(codex)
 
 if [ ${#agents[@]} -eq 0 ]; then
   echo "No agent commands found (claude, opencode, gemini)"
   exit 1
 fi
 
+# Minimize fzf prompt size while centering it.
+width=24
+height=$((${#agents[@]} + 6))
+hmargin=$((($(tput cols) - width) / 2))
+vpad=$((($(tput lines) - height) / 2))
+[ $hmargin -lt 0 ] && hmargin=0
+[ $vpad -lt 0 ] && vpad=0
+tput cup "$vpad" 0
+
 agent=$(printf '%s\n' "${agents[@]}" | fzf \
   --prompt='agent> ' \
   --reverse \
   --border=rounded \
-  --margin=25%,30% \
+  --height="$height" \
+  --margin="0,$hmargin" \
   --padding=1)
 
 if [ -n "$agent" ]; then
@@ -27,9 +37,19 @@ fi
 # Brief delay to let tmux update pane status
 sleep 0.1
 
-# Count panes still running (pane_dead=0)
+window_id=$(tmux display-message -p '#{window_id}')
-# Note: our own pane counts as running since this script is executing
+my_pane=$(tmux display-message -p '#{pane_id}')
-running=$(tmux list-panes -F '#{pane_dead}' | grep -c '^0$' || true)
 
-# If we're the only pane still running, all others are dead - detach
+# Count live sibling panes (not us, not dead)
-[ "$running" -le 1 ] && tmux detach-client
+other_live=$(tmux list-panes -t "$window_id" -F '#{pane_id} #{pane_dead}' \
+  | awk -v me="$my_pane" '$1 != me && $2 == "0"' | wc -l | tr -d ' ')
+
+if [ "$other_live" -eq 0 ]; then
+  # No live siblings — close the popup and kill the window
+  # (also cleans up any dead siblings).
+  tmux detach-client
+  tmux kill-window -t "$window_id" 2>/dev/null || true
+else
+  # User has split off other live panes — only kill ours, keep popup open.
+  tmux kill-pane 2>/dev/null || true
+fi