diff --git a/src/backend/wayland/wl_backend.c b/src/backend/wayland/wl_backend.c
index c0a75fd..a69e845 100644
--- a/src/backend/wayland/wl_backend.c
+++ b/src/backend/wayland/wl_backend.c
@@ -30,6 +30,7 @@
  * Phase 46: client_close vtable slot (wlr_xdg_toplevel_send_close);
  * title_listener updates wwin->wm_instance/wm_class on set_title signal;
  * wClientSendProtocol/wClientKill guarded for Wayland.
+ * Phase 47: prop_get_normal_hints returns XDG toplevel min/max/current size.
  */
 
 #ifdef HAVE_CONFIG_H
@@ -726,10 +727,34 @@ static void wl_event_randr_update(void *event) { (void)event; }
 static int
 wl_prop_get_normal_hints(WNativeWindow win, WNormalHints *out, int *pre_icccm)
 {
-    (void)win;
+    /* Phase 47: populate size constraints from XDG toplevel. */
+    struct wl_toplevel_view *v = wl_find_view_by_id(win);
     memset(out, 0, sizeof(*out));
     *pre_icccm = 0;
-    return 0;
+    if (!v || !v->xdg_surface || !v->xdg_surface->toplevel)
+        return 0;
+    struct wlr_xdg_toplevel *tl = v->xdg_surface->toplevel;
+    if (tl->current.min_width > 0 || tl->current.min_height > 0) {
+        out->flags      |= WNH_P_MIN_SIZE;
+        out->min_width   = (int)tl->current.min_width;
+        out->min_height  = (int)tl->current.min_height;
+    }
+    if (tl->current.max_width > 0 || tl->current.max_height > 0) {
+        out->flags      |= WNH_P_MAX_SIZE;
+        out->max_width   = (int)tl->current.max_width;
+        out->max_height  = (int)tl->current.max_height;
+    }
+    /* Report the current size as the base/initial size. */
+    if (v->xdg_surface->surface) {
+        int w = v->xdg_surface->surface->current.width;
+        int h = v->xdg_surface->surface->current.height;
+        if (w > 0 && h > 0) {
+            out->flags      |= WNH_P_SIZE;
+            out->width       = w;
+            out->height      = h;
+        }
+    }
+    return (out->flags != 0) ? 1 : 0;
 }
 
 static WWMHints *