As a devotee of the open source software movement, he has written immensely popular web apps, peer-to-peer file exchanges, and more than 100 other pieces of code that he has given away, all in the 10 years since he graduated from college. Lately, though, Aboukhadijeh has entered a new kind of flow state, helped along by a tool called Copilot. It's a piece of artificially intelligent software that does some of the typing, and the thinking, for him. Built by OpenAI, the private research lab, and GitHub, the Microsoft-owned website where programmers share code, the tool is essentially autocomplete for software development. Much as Gmail tries to finish a sentence as you write it, Copilot offers to complete a chunk of your program.