Todo CLI — Rust

A simple interactive command-line todo app built in Rust. Tasks are stored in a local todos.md file using markdown checkbox format.

Features

• Add tasks
• Delete tasks (completed or uncompleted)
• Toggle tasks between completed and uncompleted
• Auto-displays task list after every command
• Prevents duplicate tasks
• Persists tasks between sessions in todos.md

Usage

Run the app:

cargo run

Or with the compiled binary:

./todo

Commands

Command	Example	Description
add <task>	add Buy milk	Adds a new task
delete <task>	delete Buy milk	Deletes a task
done <task>	done Buy milk	Toggles task between [ ] and [x]
quit	quit	Exits the app

Tasks format in todos.md

- [ ] Buy milk
- [x] Study Rust
- [ ] Clean kitchen

Build

cargo build --release
./target/release/todo

What I learned building this

• Structs, enums, and pattern matching with match
• Vectors, HashMaps and common collection methods
• File I/O with std::fs
• Error handling with Option and Result
• Ownership and borrowing
• CLI input with std::io and std::env
• Closures and iterators (.map(), .filter(), .collect())

Built with

• Rust
• Standard library only — no external dependencies