Copy GitHub on Tuesday unveiled a code-completion tool called Copilot that shows promise though still has some way to go to meet its AI pair programming goal. If you're wondering how well it performs, in an FAQ about the service, which is available as a limited "technical preview," GitHub admitted: The code it suggests may not always work, or even make sense. While we are working hard to make GitHub Copilot better, code suggested by GitHub Copilot should be carefully tested, reviewed, and vetted, like any other code. As the developer, you are always in charge. And: GitHub Copilot doesn’t actually test the code it suggests, so the code may not even compile or run ... GitHub Copilot may suggest old or deprecated uses of libraries and languages. You can use the code anywhere, but you do so at your own risk.