Leo - Task Manager Chatbot

Introduction

Leo is a command-line task manager chatbot that helps you organize daily tasks with support for Todos, Deadlines, and Events.

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Quick Start

1. Download the leo.jar file
2. Ensure you have installed Java 17 JDK.
3. Run the application:

   java -jar leo.jar

4. Start typing commands!

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Features

Tasks

Leo supports three types of tasks:

Task Type	Description	Example
Todo	A simple task with no deadline	todo buy groceries
Deadline	A task with a deadline	deadline submit report /by 2025-12-31 2359
Event	A task with a start and end time	event meeting /from 2025-06-15 1400 /to 2025-06-15 1600

Managing Tasks

Add a Todo: todo

Adds a todo task to Leo.

Format: todo <description>

Example: todo buy groceries

Add a Deadline: deadline

Adds a deadline task to Leo.

Format: deadline <description> /by <datetime>

Example: deadline submit report /by 2025-12-31 2359

Add an Event: event

Adds an event task to Leo.

Format: event <description> /from <datetime> /to <datetime>

Example: event meeting /from 2025-06-15 1400 /to 2025-06-15 1600

List all tasks: list

Shows a list of all tasks stored in Leo.

Format: list

Mark a task as done: mark

Marks a task as done.

Format: mark <task_number>

Example: mark 1

Mark a task as not done: unmark

Marks a task as not done.

Format: unmark <task_number>

Example: unmark 1

Delete a task: delete

Deletes a task from Leo.

Format: delete <task_number>

Example: delete 1

Find tasks: find

Finds tasks whose descriptions contain the given keyword.

Format: find <keyword>

Example: find meeting

Undo last action: undo

Undoes the last action that modified the task list.

Format: undo

Exit the program: bye

Exits Leo.

Format: bye

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Date/Time Formats

Leo supports the following date/time formats:

Format	Example
Date only	2025-12-31
Date + Time	2025-12-31 2359
Slash format	31/12/2025 2359

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Data Storage

Leo automatically saves all tasks to data/leo.txt. You do not need to manually save anything.

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System Requirements

• Java 17

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Leo - Your personal task management assistant