Wait for window manager readiness

Co-authored-by: codegirl007 <codegirl-007@users.noreply.github.com>

agentbox/environment/entrypoint.sh

@@ -36,6 +36,25 @@ done
 
 openbox --sm-disable >/tmp/openbox.log 2>&1 &
 OPENBOX_PID=$!
+
+attempt=0
+while :; do
+    wm_info=$(xprop -root _NET_SUPPORTING_WM_CHECK 2>/dev/null || true)
+    case "$wm_info" in
+        *"window id #"*) break ;;
+    esac
+    if ! kill -0 "$OPENBOX_PID" 2>/dev/null; then
+        echo "Openbox exited before becoming ready" >&2
+        exit 1
+    fi
+    attempt=$((attempt + 1))
+    if [ "$attempt" -ge 100 ]; then
+        echo "Openbox did not become ready" >&2
+        exit 1
+    fi
+    sleep 0.05
+done
+
 touch /tmp/agentbox-ready
 
 while :; do

agentbox/internal/phase1/run.go

@@ -155,7 +155,7 @@ func Run(ctx context.Context) (runErr error) {
 	var windowID string
 	if err := r.waitFor(ctx, 10*time.Second, func() bool {
 		output, searchErr := r.docker(ctx, "exec", r.containerName, "xdotool",
-			"search", "--onlyvisible", "--name", "Agentbox Mover")
+			"search", "--name", "Agentbox Mover")
 		if searchErr != nil {
 			return false
 		}