Some improvements

app/Events/GameSnapshot.php

@@ -18,21 +18,20 @@ final class GameSnapshot implements ShouldBroadcastNow
     use SerializesModels;
 
     /**
-     * @param array<string, mixed> $players
-     * @param array<int, mixed> $entities
-     * @param array<int, mixed> $events
+     * @param  array<string, mixed>  $players
+     * @param  array<int, mixed>  $entities
+     * @param  array<int, mixed>  $events
      */
     public function __construct(
         public Room $room,
         public array $players,
         public array $entities,
         public array $events,
-    ) {
-    }
+    ) {}
 
     public function broadcastOn(): Channel
     {
-        return new Channel('game.' . $this->room->id);
+        return new Channel('game.'.$this->room->id);
     }
 
     public function broadcastAs(): string
@@ -50,6 +49,16 @@ final class GameSnapshot implements ShouldBroadcastNow
             'players' => $this->players,
             'entities' => $this->entities,
             'events' => $this->events,
+            'msgCap' => $this->messageSizeCap(),
         ];
     }
-}
+
+    /**
+     * Largest snapshot the WebSocket layer will deliver in one frame; used by
+     * the client debug HUD to show broadcast headroom against the Reverb cap.
+     */
+    private function messageSizeCap(): int
+    {
+        return (int) config('reverb.apps.apps.0.max_message_size', 20_000);
+    }
+}