Microsoft's GitHub unit, which is facing a torrent of competition from AI-powered coding tools, is losing its leader, and the company isn't immediately naming a successor.

Thomas Dohmke, who has been CEO of GitHub since 2021, joined Microsoft in 2015 through the acquisition of his prior startup HockeyApp. Microsoft bought GitHub for $7.5 billion in 2018, and Dohmke moved over to that business as product chief in mid-2021. Months later, he replaced Nat Friedman as GitHub CEO.

In a memo to employees on Monday that Dohmke shared as a blog post, he said he's leaving GitHub to "become a founder again," though he'll be staying on through the end of the year "to help guide the transition."

With Microsoft planning to invest tens of billions of dollars a year in artificial intelligen

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