diff --git a/src/main/java/AddDeadlineCommand.class b/src/main/java/AddDeadlineCommand.class
index 2f3dc3ddf..692e86ed1 100644
Binary files a/src/main/java/AddDeadlineCommand.class and b/src/main/java/AddDeadlineCommand.class differ
diff --git a/src/main/java/AddDeadlineCommand.java b/src/main/java/AddDeadlineCommand.java
index 49a545d51..cb24f3588 100644
--- a/src/main/java/AddDeadlineCommand.java
+++ b/src/main/java/AddDeadlineCommand.java
@@ -1,6 +1,7 @@
 import java.time.LocalDateTime;
 import java.time.format.DateTimeFormatter;
 import java.time.format.DateTimeParseException;
+
 /**
  * Command to add a deadline task.
  */
@@ -8,6 +9,7 @@ public class AddDeadlineCommand extends Command {
     private String description;
     private String by;
     private static final DateTimeFormatter INPUT_FORMAT = DateTimeFormatter.ofPattern("yyyy-MM-dd HHmm");
+
     /**
      * Constructs an AddDeadlineCommand with the specified input.
      *
@@ -18,11 +20,12 @@ public AddDeadlineCommand(String input) {
         this.description = parts[0].trim().substring(9).trim();
         this.by = parts[1].trim();
     }
+
     /**
      * Executes the command to add the deadline task to the task list.
      *
-     * @param tasks  The task list to which the task will be added.
-     * @param ui     The user interface for displaying messages to the user.
+     * @param tasks   The task list to which the task will be added.
+     * @param ui      The user interface for displaying messages to the user.
      * @param storage The storage for saving tasks to a file.
      */
     @Override
diff --git a/src/main/java/AddEventCommand.class b/src/main/java/AddEventCommand.class
index 5f5e86d7c..6de7d0b8e 100644
Binary files a/src/main/java/AddEventCommand.class and b/src/main/java/AddEventCommand.class differ
diff --git a/src/main/java/AddEventCommand.java b/src/main/java/AddEventCommand.java
index 40f929fee..55cc60f41 100644
--- a/src/main/java/AddEventCommand.java
+++ b/src/main/java/AddEventCommand.java
@@ -1,14 +1,34 @@
+/**
+ * Represents a command to add a new event to the task list.
+ * This command creates a new Event task with a description, start time, and end time.
+ */
 public class AddEventCommand extends Command {
     private String description;
     private String from;
     private String to;
 
+    /**
+     * Constructs a new AddEventCommand with the specified event details.
+     *
+     * @param description The description of the event.
+     * @param from        The start time/date of the event.
+     * @param to          The end time/date of the event.
+     */
     public AddEventCommand(String description, String from, String to) {
         this.description = description;
         this.from = from;
         this.to = to;
     }
 
+    /**
+     * Executes the command to add a new event to the task list.
+     * This method creates a new Event, adds it to the task list, updates the UI,
+     * and saves the updated task list to storage.
+     *
+     * @param tasks   The TaskList to which the new event will be added.
+     * @param ui      The Ui object used to display output to the user.
+     * @param storage The Storage object used to save the updated task list.
+     */
     @Override
     public void execute(TaskList tasks, Ui ui, Storage storage) {
         Task newTask = new Event(description, from, to);
diff --git a/src/main/java/AddTodoCommand.class b/src/main/java/AddTodoCommand.class
index 75b669e16..215b4bf56 100644
Binary files a/src/main/java/AddTodoCommand.class and b/src/main/java/AddTodoCommand.class differ
diff --git a/src/main/java/AddTodoCommand.java b/src/main/java/AddTodoCommand.java
index cfbcbee31..bf922e5db 100644
--- a/src/main/java/AddTodoCommand.java
+++ b/src/main/java/AddTodoCommand.java
@@ -3,6 +3,7 @@
  */
 public class AddTodoCommand extends Command {
     private String description;
+
     /**
      * Constructs an AddTodoCommand with the specified description.
      *
@@ -11,11 +12,12 @@ public class AddTodoCommand extends Command {
     public AddTodoCommand(String description) {
         this.description = description;
     }
+
     /**
      * Executes the command to add the todo task to the task list.
      *
-     * @param tasks  The task list to which the task will be added.
-     * @param ui     The user interface for displaying messages to the user.
+     * @param tasks   The task list to which the task will be added.
+     * @param ui      The user interface for displaying messages to the user.
      * @param storage The storage for saving tasks to a file.
      */
     @Override
diff --git a/src/main/java/Command.class b/src/main/java/Command.class
index e120c8d97..3b58bf141 100644
Binary files a/src/main/java/Command.class and b/src/main/java/Command.class differ
diff --git a/src/main/java/Command.java b/src/main/java/Command.java
index a29013e24..7f959fbf4 100644
--- a/src/main/java/Command.java
+++ b/src/main/java/Command.java
@@ -1,6 +1,26 @@
+/**
+ * Represents an abstract command in the task management system.
+ * This class serves as a base for all concrete command implementations.
+ */
 public abstract class Command {
+    /**
+     * Executes the command.
+     * This method should be implemented by all concrete command classes to define
+     * their specific behavior.
+     *
+     * @param tasks   The TaskList on which the command operates.
+     * @param ui      The Ui object used to interact with the user.
+     * @param storage The Storage object used to save and load tasks.
+     * @throws PoirotException If an error occurs during command execution.
+     */
     public abstract void execute(TaskList tasks, Ui ui, Storage storage) throws PoirotException;
 
+    /**
+     * Checks if this command should exit the program.
+     * By default, commands do not exit the program.
+     *
+     * @return true if the program should exit after this command, false otherwise.
+     */
     public boolean isExit() {
         return false;
     }
diff --git a/src/main/java/Deadline.class b/src/main/java/Deadline.class
index 830d4fbfd..3169ee89f 100644
Binary files a/src/main/java/Deadline.class and b/src/main/java/Deadline.class differ
diff --git a/src/main/java/Deadline.java b/src/main/java/Deadline.java
index 84fe016da..f73f6a1c7 100644
--- a/src/main/java/Deadline.java
+++ b/src/main/java/Deadline.java
@@ -1,21 +1,41 @@
 import java.time.LocalDateTime;
 import java.time.format.DateTimeFormatter;
 
+/**
+ * Represents a deadline task in the task management system.
+ * A deadline task is a task that needs to be completed by a specific date and time.
+ */
 public class Deadline extends Task {
     private LocalDateTime by;
     private static final DateTimeFormatter INPUT_FORMAT = DateTimeFormatter.ofPattern("yyyy-MM-dd HHmm");
     private static final DateTimeFormatter OUTPUT_FORMAT = DateTimeFormatter.ofPattern("MMM d yyyy, hh:mm a");
 
+    /**
+     * Constructs a new Deadline task with the given description and deadline.
+     *
+     * @param description The description of the deadline task.
+     * @param by          The deadline date and time in the format "yyyy-MM-dd HHmm".
+     */
     public Deadline(String description, String by) {
         super(description);
         this.by = LocalDateTime.parse(by, INPUT_FORMAT);
     }
 
+    /**
+     * Returns a string representation of the deadline task.
+     *
+     * @return A formatted string representing the deadline task, including its status, description, and deadline.
+     */
     @Override
     public String toString() {
         return "[D][" + getStatusIcon() + "] " + description + " (by: " + by.format(OUTPUT_FORMAT) + ")";
     }
 
+    /**
+     * Returns a string representation of the deadline task for file storage.
+     *
+     * @return A formatted string representing the deadline task for saving to a file.
+     */
     @Override
     public String toFileString() {
         return "D | " + (isDone ? "1" : "0") + " | " + description + " | " + by.format(INPUT_FORMAT);
diff --git a/src/main/java/DeleteCommand.class b/src/main/java/DeleteCommand.class
index ea37e3a6a..c040f7cf9 100644
Binary files a/src/main/java/DeleteCommand.class and b/src/main/java/DeleteCommand.class differ
diff --git a/src/main/java/DeleteCommand.java b/src/main/java/DeleteCommand.java
index 04aef79d9..17c960324 100644
--- a/src/main/java/DeleteCommand.java
+++ b/src/main/java/DeleteCommand.java
@@ -3,6 +3,7 @@
  */
 public class DeleteCommand extends Command {
     private int index;
+
     /**
      * Constructs a DeleteCommand with the specified index.
      *
@@ -15,8 +16,8 @@ public DeleteCommand(int index) {
     /**
      * Executes the command to delete the specified task from the task list.
      *
-     * @param tasks  The task list from which the task will be deleted.
-     * @param ui     The user interface for displaying messages to the user.
+     * @param tasks   The task list from which the task will be deleted.
+     * @param ui      The user interface for displaying messages to the user.
      * @param storage The storage for saving tasks to a file.
      * @throws PoirotException If the index is out of bounds.
      */
diff --git a/src/main/java/Event.java b/src/main/java/Event.java
index 0e049dc38..d5c4cdda8 100644
--- a/src/main/java/Event.java
+++ b/src/main/java/Event.java
@@ -11,8 +11,8 @@ public class Event extends Task {
      * Constructs an Event with the specified description, from, and to time.
      *
      * @param description The description of the event.
-     * @param from The starting time of the event in 'yyyy-MM-dd HHmm' format.
-     * @param to The ending time of the event in 'yyyy-MM-dd HHmm' format.
+     * @param from        The starting time of the event in 'yyyy-MM-dd HHmm' format.
+     * @param to          The ending time of the event in 'yyyy-MM-dd HHmm' format.
      */
     public Event(String description, String from, String to) {
         super(description);
diff --git a/src/main/java/ExitCommand.class b/src/main/java/ExitCommand.class
index e2cb55c46..9a437394f 100644
Binary files a/src/main/java/ExitCommand.class and b/src/main/java/ExitCommand.class differ
diff --git a/src/main/java/ExitCommand.java b/src/main/java/ExitCommand.java
index ed9d0b986..611ff78f4 100644
--- a/src/main/java/ExitCommand.java
+++ b/src/main/java/ExitCommand.java
@@ -5,14 +5,15 @@ public class ExitCommand extends Command {
     /**
      * Executes the command to exit the application.
      *
-     * @param tasks  The task list (not used).
-     * @param ui     The user interface for displaying messages to the user.
+     * @param tasks   The task list (not used).
+     * @param ui      The user interface for displaying messages to the user.
      * @param storage The storage for saving tasks to a file (not used).
      */
     @Override
     public void execute(TaskList tasks, Ui ui, Storage storage) {
         ui.showExit();
     }
+
     /**
      * Indicates whether this command is an exit command.
      *
diff --git a/src/main/java/ListCommand.java b/src/main/java/ListCommand.java
index e6ab13067..e60852602 100644
--- a/src/main/java/ListCommand.java
+++ b/src/main/java/ListCommand.java
@@ -5,8 +5,8 @@ public class ListCommand extends Command {
     /**
      * Executes the command to display the list of tasks.
      *
-     * @param tasks  The task list to display.
-     * @param ui     The user interface for displaying messages to the user.
+     * @param tasks   The task list to display.
+     * @param ui      The user interface for displaying messages to the user.
      * @param storage The storage for saving tasks to a file (not used).
      */
     @Override
diff --git a/src/main/java/Parser.class b/src/main/java/Parser.class
index e2071476a..e80c83dbc 100644
Binary files a/src/main/java/Parser.class and b/src/main/java/Parser.class differ
diff --git a/src/main/java/Parser.java b/src/main/java/Parser.java
index 860be89c2..6d08d2916 100644
--- a/src/main/java/Parser.java
+++ b/src/main/java/Parser.java
@@ -1,4 +1,14 @@
+/**
+ * The Parser class is responsible for parsing user input and creating appropriate Command objects.
+ */
 public class Parser {
+    /**
+     * Parses the input string and returns the corresponding Command object.
+     *
+     * @param input The user input string to be parsed.
+     * @return A Command object based on the parsed input.
+     * @throws PoirotException If the input is invalid or cannot be parsed.
+     */
     public static Command parse(String input) throws PoirotException {
         String[] list_input = input.split(" ");
         switch (list_input[0]) {
@@ -24,21 +34,33 @@ public static Command parse(String input) throws PoirotException {
                 throw new PoirotException("Unknown command!");
         }
     }
-
+    /**
+     * Parses the deadline command input and creates an AddDeadlineCommand object.
+     *
+     * @param input The deadline command input string.
+     * @return An AddDeadlineCommand object.
+     * @throws PoirotException If the deadline format is invalid.
+     */
     private static Command parseDeadlineCommand(String input) throws PoirotException {
         try {
             String[] parts = input.split("/by");
             if (parts.length < 2) {
                 throw new PoirotException("Invalid deadline format! Use: deadline <description> /by <yyyy-mm-dd>");
             }
-            String description = parts[0].trim().substring(9).trim();
+            String description = parts[0].trim();
             String by = parts[1].trim();
             return new AddDeadlineCommand(description + " /by " + by);
         } catch (ArrayIndexOutOfBoundsException e) {
             throw new PoirotException("Invalid format for deadline command.");
         }
     }
-
+    /**
+     * Parses the event command input and creates an AddEventCommand object.
+     *
+     * @param input The event command input string.
+     * @return An AddEventCommand object.
+     * @throws PoirotException If the event format is invalid.
+     */
     private static Command parseEventCommand(String input) throws PoirotException {
         try {
             if (!input.contains("/from") || !input.contains("/to")) {
diff --git a/src/main/java/Poirot.class b/src/main/java/Poirot.class
index 74fd58a02..da34a1d60 100644
Binary files a/src/main/java/Poirot.class and b/src/main/java/Poirot.class differ
diff --git a/src/main/java/Poirot.java b/src/main/java/Poirot.java
index 9e0354baa..02fd881e9 100644
--- a/src/main/java/Poirot.java
+++ b/src/main/java/Poirot.java
@@ -1,9 +1,19 @@
+/**
+ * The main class for the Poirot task management application.
+ * This class initializes the application, loads saved tasks, and runs the main command loop.
+ */
 public class Poirot {
 
     private Storage storage;
     private TaskList tasks;
     private Ui ui;
 
+    /**
+     * Constructs a new Poirot application instance.
+     * Initializes the UI, storage, and task list, and loads any previously saved tasks.
+     *
+     * @param filePath The file path for storing and loading tasks.
+     */
     public Poirot(String filePath) {
         ui = new Ui();
         storage = new Storage(filePath);
@@ -17,6 +27,10 @@ public Poirot(String filePath) {
         }
     }
 
+    /**
+     * Runs the main command loop of the application.
+     * Continuously reads user input, executes commands, and displays results until an exit command is given.
+     */
     public void run() {
         ui.showWelcome();
         boolean isExit = false;
@@ -32,6 +46,12 @@ public void run() {
         }
     }
 
+    /**
+     * The main entry point for the Poirot application.
+     * Creates a new Poirot instance and starts running it.
+     *
+     * @param args Command line arguments (not used).
+     */
     public static void main(String[] args) {
         new Poirot("./data/duke.txt").run();
     }
diff --git a/src/main/java/PoirotException.class b/src/main/java/PoirotException.class
index 8f16cb644..92234d430 100644
Binary files a/src/main/java/PoirotException.class and b/src/main/java/PoirotException.class differ
diff --git a/src/main/java/PoirotException.java b/src/main/java/PoirotException.java
index e2a4d4b3c..6817ab4a6 100644
--- a/src/main/java/PoirotException.java
+++ b/src/main/java/PoirotException.java
@@ -1,5 +1,14 @@
-public class PoirotException extends Exception{
-    public PoirotException(String message){
+/**
+ * Represents a custom exception for the Poirot task management application.
+ * This exception is used to handle application-specific errors and provide meaningful error messages.
+ */
+public class PoirotException extends Exception {
+    /**
+     * Constructs a new PoirotException with the specified error message.
+     *
+     * @param message The detailed error message explaining the reason for the exception.
+     */
+    public PoirotException(String message) {
         super(message);
     }
 }
diff --git a/src/main/java/Storage.class b/src/main/java/Storage.class
index 7fa1fab4d..15438ee4e 100644
Binary files a/src/main/java/Storage.class and b/src/main/java/Storage.class differ
diff --git a/src/main/java/Storage.java b/src/main/java/Storage.java
index dd59da6f9..f4a177e7f 100644
--- a/src/main/java/Storage.java
+++ b/src/main/java/Storage.java
@@ -1,10 +1,12 @@
 import java.io.*;
 import java.util.Scanner;
+
 /**
  * Handles loading and saving tasks to a file.
  */
 public class Storage {
     private String filePath;
+
     /**
      * Constructs a Storage object with the specified file path.
      *
@@ -62,6 +64,7 @@ public Task[] loadTasksFromFile() {
 
         return tasks;
     }
+
     /**
      * Saves the specified tasks to the file.
      *
diff --git a/src/main/java/Task.class b/src/main/java/Task.class
index 48e01303a..a60f77cd6 100644
Binary files a/src/main/java/Task.class and b/src/main/java/Task.class differ
diff --git a/src/main/java/Task.java b/src/main/java/Task.java
index 4cb4d4dde..8f9059125 100644
--- a/src/main/java/Task.java
+++ b/src/main/java/Task.java
@@ -4,6 +4,7 @@
 abstract class Task {
     protected String description;
     protected boolean isDone;
+
     /**
      * Constructs a Task with the specified description.
      *
@@ -13,9 +14,11 @@ public Task(String description) {
         this.description = description;
         this.isDone = false;
     }
+
     public String getDescription() {
         return description;
     }
+
     /**
      * Returns the status icon of the task.
      *
@@ -24,6 +27,7 @@ public String getDescription() {
     public String getStatusIcon() {
         return (isDone ? "X" : " ");
     }
+
     /**
      * Marks the task as done or not done.
      *
@@ -32,7 +36,9 @@ public String getStatusIcon() {
     public void setDone(boolean isDone) {
         this.isDone = isDone;
     }
+
     public abstract String toString();
+
     /**
      * Returns a string representation for saving the task to a file.
      *
diff --git a/src/main/java/TaskList.class b/src/main/java/TaskList.class
index 9b205c114..2776cf037 100644
Binary files a/src/main/java/TaskList.class and b/src/main/java/TaskList.class differ
diff --git a/src/main/java/TaskList.java b/src/main/java/TaskList.java
index 2815eae59..aa9abad5b 100644
--- a/src/main/java/TaskList.java
+++ b/src/main/java/TaskList.java
@@ -1,4 +1,5 @@
 import java.util.ArrayList;
+
 /**
  * Represents a list of tasks.
  */
@@ -26,6 +27,7 @@ public ArrayList<Task> findTasks(String keyword) {
         }
         return foundTasks;
     }
+
     /**
      * Deletes a task from the task list at the specified index.
      *
@@ -38,6 +40,7 @@ public void delete(int index) {
         tasks[lastIndex - 1] = null;
         lastIndex--;
     }
+
     /**
      * Returns the list of tasks.
      *
@@ -46,6 +49,7 @@ public void delete(int index) {
     public Task[] getTasks() {
         return tasks;
     }
+
     /**
      * Returns the number of tasks in the task list.
      *
@@ -54,6 +58,7 @@ public Task[] getTasks() {
     public int getTaskCount() {
         return lastIndex;
     }
+
     /**
      * Returns the task at the specified index.
      *
@@ -63,10 +68,11 @@ public int getTaskCount() {
     public Task getTask(int index) {
         return tasks[index];
     }
+
     /**
      * Marks the specified task as done.
      *
-     * @param index The index of the task to mark.
+     * @param index  The index of the task to mark.
      * @param isDone true to mark as done, false otherwise.
      */
     public void markTask(int index, boolean isDone) {
diff --git a/src/main/java/Todo.class b/src/main/java/Todo.class
index 762beebf1..4f529c709 100644
Binary files a/src/main/java/Todo.class and b/src/main/java/Todo.class differ
diff --git a/src/main/java/Todo.java b/src/main/java/Todo.java
index e4ab5c972..a260ded37 100644
--- a/src/main/java/Todo.java
+++ b/src/main/java/Todo.java
@@ -1,7 +1,7 @@
 /**
  * Represents a simple todo task without any specific date or time.
  */
-public class Todo extends Task{
+public class Todo extends Task {
     /**
      * Constructs a Todo with the specified description.
      *
@@ -10,6 +10,7 @@ public class Todo extends Task{
     public Todo(String description) {
         super(description);
     }
+
     /**
      * Returns the string representation of the todo task.
      *
@@ -19,6 +20,7 @@ public Todo(String description) {
     public String toString() {
         return "[T][" + getStatusIcon() + "] " + description;
     }
+
     /**
      * Returns a string representation for saving the todo task to a file.
      *
diff --git a/src/main/java/Ui.class b/src/main/java/Ui.class
index cbf3c63de..e8bfcbfbd 100644
Binary files a/src/main/java/Ui.class and b/src/main/java/Ui.class differ
diff --git a/src/main/java/Ui.java b/src/main/java/Ui.java
index 450bf7d18..712af4ae1 100644
--- a/src/main/java/Ui.java
+++ b/src/main/java/Ui.java
@@ -1,5 +1,6 @@
 import java.util.Scanner;
 import java.util.ArrayList;
+
 /**
  * Handles the user interface interactions for the task management application.
  */
@@ -15,6 +16,7 @@ public void showWelcome() {
         System.out.println("Hello! I'm POIROT\nWhat can I do for you?");
         showLine();
     }
+
     /**
      * Displays a goodbye message when exiting the application.
      */
@@ -28,6 +30,7 @@ public String readCommand() {
         Scanner scanner = new Scanner(System.in);
         return scanner.nextLine();
     }
+
     /**
      * Displays an error message to the user.
      *
@@ -38,10 +41,11 @@ public void showError(String message) {
         System.out.println(message);
         showLine();
     }
+
     /**
      * Displays a message indicating that a task has been added.
      *
-     * @param task     The task that was added.
+     * @param task      The task that was added.
      * @param taskCount The current count of tasks in the list.
      */
     public void showAddedTask(Task task, int taskCount) {
@@ -51,10 +55,11 @@ public void showAddedTask(Task task, int taskCount) {
         System.out.println("Now you have " + taskCount + " tasks in the list.");
         showLine();
     }
+
     /**
      * Displays a message indicating that a task has been deleted.
      *
-     * @param task     The task that was deleted.
+     * @param task      The task that was deleted.
      * @param taskCount The current count of tasks in the list.
      */
     public void showDeletedTask(Task task, int taskCount) {
@@ -64,6 +69,7 @@ public void showDeletedTask(Task task, int taskCount) {
         System.out.println("Now you have " + taskCount + " tasks in the list.");
         showLine();
     }
+
     /**
      * Displays the list of tasks to the user.
      *
@@ -81,6 +87,7 @@ public void showTaskList(Task[] tasks, int lastIndex) {
         }
         showLine();
     }
+
     /**
      * Displays a message indicating that a task has been marked as done.
      *
@@ -93,6 +100,7 @@ public void showMarkTask(Task task) {
         System.out.println(task.getDescription());
         showLine();
     }
+
     /**
      * Displays a message indicating that a task has been unmarked as done.
      *
@@ -105,6 +113,7 @@ public void showUnmarkTask(Task task) {
         System.out.println(task.getDescription());
         showLine();
     }
+
     /**
      * Displays the tasks found that match the keyword.
      *
@@ -116,6 +125,7 @@ public void showFoundTasks(ArrayList<Task> tasks) {
             System.out.println((i + 1) + ". " + tasks.get(i).toString());
         }
     }
+
     public void showMessage(String message) {
         System.out.println(message);
     }
diff --git a/src/main/java/UnmarkCommand.class b/src/main/java/UnmarkCommand.class
index 5b746e6cd..5a5a0dfb0 100644
Binary files a/src/main/java/UnmarkCommand.class and b/src/main/java/UnmarkCommand.class differ
diff --git a/src/main/java/UnmarkCommand.java b/src/main/java/UnmarkCommand.java
index b8d66d8ab..4f1383111 100644
--- a/src/main/java/UnmarkCommand.java
+++ b/src/main/java/UnmarkCommand.java
@@ -1,10 +1,30 @@
+/**
+ * Represents a command to unmark a task as not completed in the Poirot task management system.
+ * This command changes the status of a task from completed to not completed.
+ */
 public class UnmarkCommand extends Command {
     private int index;
 
+    /**
+     * Constructs a new UnmarkCommand with the specified task index.
+     *
+     * @param index The index of the task to be unmarked (1-based indexing).
+     */
     public UnmarkCommand(int index) {
         this.index = index;
     }
 
+    /**
+     * Executes the unmark command.
+     * This method unmarks the specified task as not completed, updates the UI,
+     * and saves the changes to storage.
+     *
+     * @param tasks   The TaskList containing all tasks.
+     * @param ui      The UI object used to display messages to the user.
+     * @param storage The Storage object used to save tasks.
+     * @throws PoirotException If the task index is out of bounds.
+     */
+
     @Override
     public void execute(TaskList tasks, Ui ui, Storage storage) throws PoirotException {
         if (index < 1 || index > tasks.getTaskCount()) {
diff --git a/src/main/java/data/duke.txt b/src/main/java/data/duke.txt
index 6da49ffc3..02a909e61 100644
--- a/src/main/java/data/duke.txt
+++ b/src/main/java/data/duke.txt
@@ -1,7 +1,11 @@
-T | 1 | sleep
+T | 0 | sleep
 T | 0 | work
 T | 0 | go to work
 D | 0 | t | 2025-04-01 1800
 E | 0 | party | 2025-04-01 1800 | 2025-04-01 2100
 D | 0 | work | 2025-04-01 1800
 T | 0 | mini project
+D | 0 | uation | 2024-10-31 2359
+T | 0 | go to work
+D | 0 | peer evaluation | 2024-10-31 2359
+E | 0 | new party | 2024-11-21 1700 | 2024-11-23 1800