Version Control

Version control is the practice (and category of tools) that tracks every change made to a project’s files over time, so you can review history, revert mistakes, and coordinate work across a team. The most widely used version control system today is Git, which is distributed, meaning every contributor has a complete copy of the project’s history on their own machine. Version control is foundational to modern software development, enabling practices like code review, branching for parallel workstreams, and automated testing before changes go live.

The Simple Version

You know how Google Docs lets you look at “Version history” and go back to what the document looked like yesterday? Version control is that concept, but for entire projects with hundreds of files.

Every time you save a checkpoint (called a “commit”), version control remembers exactly what every file looked like at that moment. You can compare versions, undo changes, or even work on two different experiments at the same time without them interfering with each other.

Why It Matters

Without version control, one bad change can ruin a project with no way back. With it, you’re free to experiment. Try something bold. If it doesn’t work, rewind. The safety net makes you braver.

It’s also essential for teamwork. When multiple people are editing the same project, version control keeps track of who changed what and helps merge everyone’s work together without losing anything.

How It’s Used on This Site

Every change to this site is tracked with Git, the most popular version control system. Each meaningful update gets a commit with a message explaining what changed and why. The full history of the site, from the first line of code to right now, is preserved and browsable.