diff --git a/pom.xml b/pom.xml
index 573a4f9..4a7e9b8 100644
--- a/pom.xml
+++ b/pom.xml
@@ -6,7 +6,7 @@
 
   <groupId>com.minster586</groupId>
   <artifactId>ServerDevMode</artifactId>
-  <version>1.0.2</version>
+  <version>1.0.3</version>
   <packaging>jar</packaging>
   <name>ServerDevMode</name>
   <description>Development mode plugin for Minecraft servers—tracing events and debugging logs</description>
diff --git a/src/main/java/com/minster586/devmode/CommandHandler.java b/src/main/java/com/minster586/devmode/CommandHandler.java
index 89cbe6c..a39da03 100644
--- a/src/main/java/com/minster586/devmode/CommandHandler.java
+++ b/src/main/java/com/minster586/devmode/CommandHandler.java
@@ -5,7 +5,30 @@ import org.bukkit.command.CommandExecutor;
 import org.bukkit.command.CommandSender;
 import org.bukkit.entity.Player;
 
-public class CommandHandler implements CommandExecutor {
+import org.bukkit.command.TabCompleter;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+
+public class CommandHandler implements CommandExecutor, TabCompleter {
+    private static final List<String> SUBCOMMANDS = Arrays.asList("on", "off", "level", "zip");
+    private static final List<String> LEVELS = Arrays.asList("minimal", "verbose", "full");
+    @Override
+    public List<String> onTabComplete(CommandSender sender, Command command, String alias, String[] args) {
+        if (!sender.hasPermission("serverdevmode.use")) return Collections.emptyList();
+
+        if (args.length == 1) {
+            return SUBCOMMANDS.stream()
+                    .filter(s -> s.startsWith(args[0].toLowerCase()))
+                    .toList();
+        }
+        if (args.length == 2 && args[0].equalsIgnoreCase("level")) {
+            return LEVELS.stream()
+                    .filter(l -> l.startsWith(args[1].toLowerCase()))
+                    .toList();
+        }
+        return Collections.emptyList();
+    }
 
     private final DevModeManager manager;
 
diff --git a/src/main/java/com/minster586/devmode/ServerDevMode.java b/src/main/java/com/minster586/devmode/ServerDevMode.java
index ad56ed8..04b1711 100644
--- a/src/main/java/com/minster586/devmode/ServerDevMode.java
+++ b/src/main/java/com/minster586/devmode/ServerDevMode.java
@@ -21,8 +21,11 @@ public class ServerDevMode extends JavaPlugin {
         // Initialize dev mode manager with logger
         devModeManager = new DevModeManager(this, logWriter);
 
-        // Register command handler
-        getCommand("devmode").setExecutor(new CommandHandler(devModeManager));
+
+        // Register command handler and tab completer
+        CommandHandler handler = new CommandHandler(devModeManager);
+        getCommand("devmode").setExecutor(handler);
+        getCommand("devmode").setTabCompleter(handler);
 
         // Register listeners
         getServer().getPluginManager().registerEvents(new ChatEventListener(devModeManager), this);
diff --git a/src/main/resources/plugin.yml b/src/main/resources/plugin.yml
index 09b3413..a5cd6e3 100644
--- a/src/main/resources/plugin.yml
+++ b/src/main/resources/plugin.yml
@@ -1,5 +1,5 @@
 name: ServerDevMode
-version: 1.0.2
+version: 1.0.3
 main: com.minster586.devmode.ServerDevMode
 api-version: 1.16
 description: Server-wide development mode plugin for event tracing, chat logging, and debugging support.