More CommandBlock API

paper-server/src/main/java/io/papermc/paper/commands/PaperCommandBlockHolder.java

@@ -0,0 +1,34 @@
+package io.papermc.paper.commands;
+
+import io.papermc.paper.adventure.PaperAdventure;
+import io.papermc.paper.command.CommandBlockHolder;
+import net.kyori.adventure.text.Component;
+import net.minecraft.world.level.BaseCommandBlock;
+import org.jspecify.annotations.NullMarked;
+import org.jspecify.annotations.Nullable;
+
+@NullMarked
+public interface PaperCommandBlockHolder extends CommandBlockHolder {
+
+    BaseCommandBlock getCommandBlockHandle();
+
+    @Override
+    default Component lastOutput() {
+        return PaperAdventure.asAdventure(this.getCommandBlockHandle().getLastOutput());
+    }
+
+    @Override
+    default void lastOutput(final @Nullable Component lastOutput) {
+        this.getCommandBlockHandle().setLastOutput(PaperAdventure.asVanilla(lastOutput));
+    }
+
+    @Override
+    default int getSuccessCount() {
+        return this.getCommandBlockHandle().getSuccessCount();
+    }
+
+    @Override
+    default void setSuccessCount(final int successCount) {
+        this.getCommandBlockHandle().setSuccessCount(successCount);
+    }
+}

paper-server/src/main/java/org/bukkit/craftbukkit/block/CraftCommandBlock.java

@@ -6,7 +6,7 @@ import org.bukkit.World;
 import org.bukkit.block.CommandBlock;
 import org.bukkit.craftbukkit.util.CraftChatMessage;
 
-public class CraftCommandBlock extends CraftBlockEntityState<CommandBlockEntity> implements CommandBlock {
+public class CraftCommandBlock extends CraftBlockEntityState<CommandBlockEntity> implements CommandBlock, io.papermc.paper.commands.PaperCommandBlockHolder {
 
     public CraftCommandBlock(World world, CommandBlockEntity tileEntity) {
         super(world, tileEntity);
@@ -56,5 +56,10 @@ public class CraftCommandBlock extends CraftBlockEntityState<CommandBlockEntity>
     public void name(net.kyori.adventure.text.Component name) {
         getSnapshot().getCommandBlock().setCustomName(name == null ? net.minecraft.network.chat.Component.literal("@") : io.papermc.paper.adventure.PaperAdventure.asVanilla(name));
     }
+
+    @Override
+    public net.minecraft.world.level.BaseCommandBlock getCommandBlockHandle() {
+        return getSnapshot().getCommandBlock();
+    }
     // Paper end
 }

paper-server/src/main/java/org/bukkit/craftbukkit/entity/CraftMinecartCommand.java

@@ -13,7 +13,7 @@ import org.bukkit.permissions.PermissionAttachment;
 import org.bukkit.permissions.PermissionAttachmentInfo;
 import org.bukkit.plugin.Plugin;
 
-public class CraftMinecartCommand extends CraftMinecart implements CommandMinecart {
+public class CraftMinecartCommand extends CraftMinecart implements CommandMinecart, io.papermc.paper.commands.PaperCommandBlockHolder {
     private final PermissibleBase perm = new PermissibleBase(this);
 
     public CraftMinecartCommand(CraftServer server, MinecartCommandBlock entity) {
@@ -64,6 +64,17 @@ public class CraftMinecartCommand extends CraftMinecart implements CommandMineca
     public net.kyori.adventure.text.@org.jetbrains.annotations.NotNull Component name() {
         return io.papermc.paper.adventure.PaperAdventure.asAdventure(this.getHandle().getCommandBlock().getName());
     }
+
+    @Override
+    public net.minecraft.world.level.BaseCommandBlock getCommandBlockHandle() {
+        return getHandle().getCommandBlock();
+    }
+
+    @Override
+    public void lastOutput(net.kyori.adventure.text.Component lastOutput) {
+        io.papermc.paper.commands.PaperCommandBlockHolder.super.lastOutput(lastOutput);
+        getCommandBlockHandle().onUpdated();
+    }
     // Paper end
 
     @Override