Don't break the build. Test it!

The most basic rule of developing software as a team is, "Don't break the build."

If you commit code or other project files that make the build break, you've messed up everybody's work.

Today, I committed some code when I was asked and It broke the build. Once someone had updated, they could no longer build the web app we're working on.

So, never commit without testing that the build works!