GitHub Chief Executive Thomas Dohmke said on Monday he will leave the Microsoft-owned code-hosting platform to launch a new startup, capping a tenure that included a major push into artificial intelligence through the company's Copilot products. Dohmke, who moved to the U.S. from Germany more than a decade ago after selling his startup to Microsoft, said his "startup roots" prompted the decision. "I've decided to leave GitHub to become a founder again," he said in a blog post, but did not