---
title: codecrafters-io/build-your-own-x
description: A curated collection of step-by-step guides for rebuilding technologies from scratch
tags: [github, learning, programming, open-source]
---

# codecrafters-io/build-your-own-x

## Overview

[[codecrafters-io/build-your-own-x]] is a renowned GitHub repository that compiles **well-written, step-by-step guides** for recreating favorite technologies from scratch. The project is maintained by [CodeCrafters, Inc.](https://codecrafters.io/) and originated by [Daniel Stefanovic](https://github.com/danistefanovic).

## Key Facts

- **Repository**: [codecrafters-io/build-your-own-x](https://github.com/codecrafters-io/build-your-own-x)
- **Platform**: [CodeCrafters](https://codecrafters.io/)
- **License**: CC0 (public domain)
- **Contributors**: Many contributors
- **Languages**: Primarily Markdown documentation

## 26 Technology Domains

The repository covers 26 major technology categories:

| Category | Examples |
|----------|----------|
| 3D Renderer | Ray tracing, rasterization |
| Operating System | Linux from scratch, kernel development |
| Programming Language | Interpreters, compilers |
| Database | Redis, SQL engines, NoSQL |
| Git | Version control from scratch |
| Docker | Container from scratch |
| Web Browser | Layout engine, rendering |
| Web Server | HTTP servers |
| Network Stack | TCP/IP stack |
| Neural Network | Deep learning from scratch |
| Game | Tetris, Breakout |
| Emulator | CHIP-8, GameBoy |
| Bot | Discord, Telegram bots |
| Blockchain | Cryptocurrency implementation |

## Related

- [[Byox]] — The learning methodology this repository embodies
- [[CodeCrafters]] — The interactive learning platform