I built a Developer Tool at 16 (CodeAtlas)

Source: Dev.to

Motivation

I built a developer tool at 16 because I was frustrated with how hard it was to understand new codebases. Every time I opened a larger project, I felt like I was reading something barely understandable for most humans. Files depended on other files, functions called code buried deep in completely different folders, and I was constantly jumping between tabs trying to visualise how everything worked together.

It wasn’t that I couldn’t understand the code; it just took far too long to complete what should have been a simple task. I kept rebuilding a mental image of the codebase each time I reopened a project and began to wonder if there had to be a better way.

Early Prototype

That’s where the idea for CodeAtlas came from. I didn’t think of it as a startup or a shareable project at first—just a personal challenge: what if I could visualise a codebase instead of only seeing files and folders?

The first version was a simple script that scanned a repository, inspected import statements, and drew lines between files. There was no fancy interface or underlying structure; I was merely testing whether the idea made sense outside my own head.

When it finally produced a graph—messy and broken—it felt oddly different from anything I’d built before. It seemed useful, like something people might actually want to use.

Challenges and Improvements

The early version was far from useful. It broke on anything slightly complex, took an eternity to load larger projects, and produced chaotic webs where everything overlapped, making it impossible to understand what was happening.

Instead of starting over, I iterated incrementally:

• Improved the accuracy of dependency detection.
• Added features such as search bars and code viewers.
• Refactored parts that didn’t scale properly.
• Redesigned how relationships were displayed to focus on clarity rather than visual flair.

Turning Point

The real breakthrough came when I showed the project to someone else for the first time. I expected comments on the graph’s visuals, but they told me it helped them onboard new developers to their codebases. That moment made me realise I wasn’t just drawing lines between files; I was reducing the complexity of repositories into an abstract representation that people could actually understand and keep in mind.

From then on, every change was driven by the goal of making understanding faster, not just making the tool look prettier.

Release and Ongoing Work

Like many projects that start to gain traction, I eventually hit the point where endless improvement became a trap. I kept a long list of possible features and refinements, but I stopped waiting for the tool to feel “finished” and uploaded it to GitHub. It isn’t perfect, and it still isn’t, but people can now load real repositories and get something useful out of it.

Reflection

Looking back, CodeAtlas has become more than a visualisation tool—it has changed how I see code entirely. I no longer see just files; I see relationships, structure, and the hidden connections beneath the surface. It also taught me to view code from a different perspective, which influences how I build and maintain repositories today.

I’m curious… what’s the most confusing part of a codebase for you when you join a new project? Drop it in the comments—I’ll read through them, and your feedback might shape what I build next.

Links

• Try CodeAtlas → GitHub
• More writing → Substack
• Follow the build → X (Twitter)