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Mojo Academy · Lesson

Project Layout Best Practices

Organize a maintainable codebase.

Project Layout Best Practices is a free Mojo Academy lesson on CoddyKit — lesson 4 of 4. You can read the complete lesson below for free — then practise it hands-on in the browser with a built-in code editor and a 24/7 AI tutor. It is part of the Mojo Academy learning path, one of 4 lessons in the course, and your progress syncs across the web and the CoddyKit app.

Layout Is a Gift to Yourself

A tidy folder structure pays off every day. Good layout makes a project easy to navigate and grow. 🗂️

Separate Source and Tests

Keep library code in a src folder and tests in their own folder. Clear separation keeps each concern easy to find.

A Sensible Tree

A simple project often looks like this: a package folder, a tests folder, and a top-level readme to explain it.

myproject/
  mypkg/
  tests/
  README.md

Group by Purpose

Place related modules in the same package and unrelated code elsewhere. Logical grouping mirrors how you think.

One Job per Module

Aim for each module to have a single, clear responsibility. Small focused files are easier to read and change.

Name Files for What They Hold

Descriptive filenames like tokenizer.mojo tell readers what is inside before they even open the file.

Keep the Entry Point Thin

Let your main file wire things together and stay small. The real logic belongs in well-named modules.

Tests Mirror the Source

Structure your tests folder to echo the source layout. Then finding the test for any module is obvious.

Document at the Top

A clear README at the root explains what the project does and how to build it, so newcomers start fast.

Let It Grow Gracefully

A clean layout scales. When you add features, there is an obvious place for new modules instead of a mess.

Consistency Wins

Pick a structure and apply it everywhere. A consistent project is one teammates and future-you can trust. ✨

Quick Check

Let us review a healthy project layout habit.

Recap

Separate src and tests, give each module one job, name files clearly, and add a README. Consistency keeps it healthy. 🎯

Frequently asked questions

Is the “Project Layout Best Practices” lesson free?

Yes — the full text of “Project Layout Best Practices” is free to read here on the web, and the Mojo Academy course includes 4 lessons in total. To practise it interactively (a built-in code editor and a 24/7 AI tutor) and unlock the rest of the Mojo Academy course, upgrade to CoddyKit PRO.

What will I learn in “Project Layout Best Practices”?

Organize a maintainable codebase. You practise Mojo Academy with hands-on code you run directly in the browser, and a 24/7 AI tutor answers your questions as you work through the lesson.

Do I need any experience to start Mojo Academy?

No prior experience is required. Mojo Academy on CoddyKit is structured for beginners through advanced learners; this is — lesson 4 of 4, so you can start here or from the beginning and move at your own pace.

How long does the “Project Layout Best Practices” lesson take?

Most CoddyKit lessons take about 5–10 minutes. Each one is bite-sized and interactive, so you make steady progress and pick up exactly where you left off across the web and the app.

Can I write and run code in this Mojo Academy lesson?

Yes. Every Mojo Academy lesson includes a built-in code editor, so you write and run real code right in your browser and get instant AI feedback — no local setup required.

All lessons in this course

  1. Modules and Imports
  2. Building a .mojopkg
  3. Public APIs and Structure
  4. Project Layout Best Practices
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