GitHub is your undo button

Simple explanation

Every time your app is in a working state, you can save that moment to GitHub. This is called a commit. If AI later breaks something, you can return to that saved moment in seconds. Think of it as the best undo button you have ever had — one that saves the entire state of your app, not just the last line you typed.

What to do

After any working version of your app, commit to GitHub with a clear message like "Working: home screen layout done." Before you ask AI to make any big change, always commit first. This means you always have a safe version to return to, no matter what happens next.

Copy-paste prompt

Explain what this git command does and whether it is safe to run: [paste the git command here]. I am a non-developer and I want to understand exactly what will happen before I run it.

Course note

Module 3 is entirely about using GitHub safely as a non-developer. We cover the exact steps, the exact commands, what to do when something looks wrong, and how to recover from a mistake.

Key takeaway

Commit before you prompt. Every single time.