Filing: some Twitter source code was leaked by a user called "FreeSpeechEnthusiast" on GitHub, which took it down to comply with a DMCA notice sent on Friday (New York Times)

New York Times:
Filing: some Twitter source code was leaked by a user called “FreeSpeechEnthusiast” on GitHub, which took it down to comply with a DMCA notice sent on Friday  —  The leak adds to the challenges facing the Elon Musk-owned company, which is trying to unmask the person responsible and any other people who downloaded the code.