diff --git a/todo/src/main/java/ru/kamask/pet/todo/TodoApp.java b/todo/src/main/java/ru/kamask/pet/todo/TodoApp.java
index da58062..232ccbb 100644
--- a/todo/src/main/java/ru/kamask/pet/todo/TodoApp.java
+++ b/todo/src/main/java/ru/kamask/pet/todo/TodoApp.java
@@ -11,9 +11,6 @@ public class TodoApp {
         var service = new TaskService(new InMemoryTaskRepository());
         var cli = new CliEngine(service);
 
-        // service.create("test has-id");
-        // System.out.println(service.has(2));
-
         cli.start();
     }
 
diff --git a/todo/src/main/java/ru/kamask/pet/todo/cli/CliEngine.java b/todo/src/main/java/ru/kamask/pet/todo/cli/CliEngine.java
index 7fa2292..f41abd5 100644
--- a/todo/src/main/java/ru/kamask/pet/todo/cli/CliEngine.java
+++ b/todo/src/main/java/ru/kamask/pet/todo/cli/CliEngine.java
@@ -45,6 +45,7 @@ public class CliEngine {
     void initializeCommands() {
         registerCommand(new CreateCommand());
         registerCommand(new ListCommand());
+        registerCommand(new CompleteCommand());
     }
 
     void handleHelp() {
diff --git a/todo/src/main/java/ru/kamask/pet/todo/cli/CompleteCommand.java b/todo/src/main/java/ru/kamask/pet/todo/cli/CompleteCommand.java
new file mode 100644
index 0000000..a0ece27
--- /dev/null
+++ b/todo/src/main/java/ru/kamask/pet/todo/cli/CompleteCommand.java
@@ -0,0 +1,34 @@
+package ru.kamask.pet.todo.cli;
+
+import java.util.Optional;
+
+import ru.kamask.pet.todo.service.TaskService;
+
+public class CompleteCommand implements Command {
+    @Override
+    public String name() {
+        return "complete";
+    }
+
+    @Override
+    public String usage() {
+        return String.format(Command.templateUsage, name() + " <ID>", "Отметить задачу как \"выполнена\".");
+    }
+
+    @Override
+    public Optional<String> handle(String[] args, TaskService service) {
+        if (args.length != 1)
+            return Optional.of(Command.errorMessage);
+
+        try {
+            int id = Integer.parseInt(args[0]);
+
+            return Optional.of(service.complete(id)
+                    ? "Задача ID-%d выполнена.".formatted(id)
+                    : "Задача ID-%d не найдена.".formatted(id));
+
+        } catch (NumberFormatException e) {
+            return Optional.of("ID - должен быть числом.");
+        }
+    }
+}