Fix API breaking change, deprecate ProxyAudience

api/src/main/java/com/velocitypowered/api/command/CommandSource.java

@@ -2,7 +2,9 @@ package com.velocitypowered.api.command;
 
 import com.velocitypowered.api.permission.PermissionSubject;
 import com.velocitypowered.api.proxy.ProxyAudience;
+import com.velocitypowered.api.util.AdventureCompat;
 import net.kyori.adventure.text.Component;
+import org.checkerframework.checker.nullness.qual.NonNull;
 
 /**
  * Represents something that can be used to run a {@link Command}.
@@ -17,4 +19,9 @@ public interface CommandSource extends PermissionSubject, ProxyAudience {
    */
   @Deprecated
   void sendMessage(net.kyori.text.Component component);
+
+  @Override
+  default void sendMessage(@NonNull Component message) {
+    this.sendMessage(AdventureCompat.asOriginalTextComponent(message));
+  }
 }

api/src/main/java/com/velocitypowered/api/proxy/ProxyAudience.java

@@ -13,7 +13,10 @@ import org.checkerframework.checker.nullness.qual.NonNull;
  * Indicates an {@link Audience} that is on the proxy. This interface contains no-op default methods
  * that are used to bridge compatibility issues with the new adventure API. This interface will go
  * away in Velocity 2.0.0.
+ *
+ * @deprecated Only used to handle compatibility problems, will go away in Velocity 2.0.0
  */
+@Deprecated
 public interface ProxyAudience extends Audience {
 
   @Override