finished code for tag command.

app/src/main/java/org/hyperskill/community/hyper/App.java

@@ -9,6 +9,7 @@
 import net.dv8tion.jda.api.JDABuilder;
 import net.dv8tion.jda.api.interactions.commands.build.CommandData;
 import org.hyperskill.community.hyper.command.slash.PingCommand;
+import org.hyperskill.community.hyper.command.slash.tag.TagCommand;
 
 public final class App {
     public static void main(String[] args) {
@@ -27,6 +28,7 @@ public static List<Command> commands() {
         List<Command> commands = new ArrayList<>();
 
         commands.add(new PingCommand());
+        commands.add(new TagCommand());
 
         return commands;
     }

app/src/main/java/org/hyperskill/community/hyper/command/slash/tag/TagCommand.java

@@ -0,0 +1,48 @@
+package org.hyperskill.community.hyper.command.slash.tag;
+
+import net.dv8tion.jda.api.events.interaction.command.SlashCommandInteractionEvent;
+import net.dv8tion.jda.api.interactions.commands.OptionType;
+import net.dv8tion.jda.api.interactions.commands.build.Commands;
+import net.dv8tion.jda.api.interactions.commands.build.OptionData;
+import org.hyperskill.community.hyper.command.slash.SlashCommand;
+
+
+public class TagCommand extends SlashCommand {
+    public TagCommand() {
+
+        super(Commands
+                .slash("tag", "bot message")
+
+                .addOptions(
+                        new OptionData(OptionType.STRING, "id", "id of tag command")
+                                .addChoice(TagMessageConstants.HOW_TO_ASK_ID, TagMessageConstants.HOW_TO_ASK_VALUE)
+                                .addChoice(TagMessageConstants.HOW_TO_CONTACT_SUPPORT_ID, TagMessageConstants.HOW_TO_CONTACT_SUPPORT_VALUE)
+                )
+        );
+    }
+
+    /**
+     * send pre-defined bot messages to user
+     *
+     * @param event interaction event
+     */
+    @Override
+    public void onSlashCommand(SlashCommandInteractionEvent event) {
+        event.reply(getTagOption(event.getCommandString())).queue();
+    }
+
+    /**
+     *
+     * parse command string from event and extract message value
+     *
+     * @param commandString full command that includes id and value
+     *
+     * @return value
+     */
+    private String getTagOption(String commandString){
+
+        // command string is : /tag id: <value>
+        String[] commandSegments = commandString.split(":");
+        return commandSegments[1].trim();
+    }
+}

app/src/main/java/org/hyperskill/community/hyper/command/slash/tag/TagMessageConstants.java

@@ -0,0 +1,12 @@
+package org.hyperskill.community.hyper.command.slash.tag;
+
+/**
+ * Class that contains bot messages
+ */
+public class TagMessageConstants {
+
+    public static final String HOW_TO_ASK_ID = "how-to-ask-question";
+    public static final String HOW_TO_ASK_VALUE = "ask away";
+    public static final String HOW_TO_CONTACT_SUPPORT_ID = "how-to-contact-support";
+    public static final String HOW_TO_CONTACT_SUPPORT_VALUE = "contact support";
+}