Sample outdoor weather from the climate preset so people can freeze and the clock can show it.

Protocol v8 adds tenths of a °C and precipitation to the clock frame; warmth drains from insulation versus place temperature.

Co-authored-by: Cursor <cursoragent@cursor.com>

tests/HSchool.AppHost.Tests/GameSocketTests.cs

@@ -428,6 +428,22 @@ public class GameSocketTests(AppHostFixture fixture)
         Assert.Equal(ClientTime, pong.ClientTimeMs);
     }
 
+    [Fact]
+    public async Task OldProtocolVersion_IsRejected()
+    {
+        using var socket = await ConnectRawAsync();
+
+        await SendAsync(socket, buffer => ProtocolCodec.WriteHello(
+            buffer,
+            new ClientHelloMessage((byte)(ProtocolConstants.Version - 1), ProtocolConstants.LocaleRussian)));
+
+        var buffer = new byte[ProtocolConstants.MaxMessageSize];
+        var result = await socket.ReceiveAsync(buffer, TestContext.Current.CancellationToken);
+
+        Assert.Equal(WebSocketMessageType.Close, result.MessageType);
+        Assert.Equal(WebSocketCloseStatus.ProtocolError, socket.CloseStatus);
+    }
+
     [Fact]
     public async Task VersionMismatch_IsRejected()
     {