https://video.ut0pia.org/videos/watch/70a22546-fd40-4e24-9fd8-45672724f43f A Viking VoIP phone sat in the ElevenLabs San Francisco office for a year. Three senior engineers and ChatGPT could not get it working. Boris from ElevenLabs cracked the undocumented protocol with Claude Code in a couple of days: brute forced all 676 possible two letter command combinations, found 80 valid ones, then set up a TCP proxy between a Windows virtual machine and the phone to intercept and log what the proprietary Windows XP software was actually sending. The last piece was a one byte checksum in the persistence command. Claude reverse engineered the formula by running known input output pairs through it, confirmed the pattern in a closed loop, and derived a simple subtraction. Boris describes his own role as being the hands: Claude orchestrated, he physically rebooted the phone and reported how many beeps he heard. The protocol is now open sourced as a Claude Code skill so anyone with a Viking phone can configure it directly without the Windows software. The outcome at AI Engineer Europe: a red phone booth on the third floor where picking up the receiver connects you to a Michael Caine voice agent that quizzes you on British AI history. Sat, 30 May 2026 14:33:26 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://video.ut0pia.org https://video.ut0pia.org/lazy-static/avatars/0287a09a-aae7-4840-9843-b416426e7046.webp https://video.ut0pia.org/videos/watch/70a22546-fd40-4e24-9fd8-45672724f43f All rights reserved, unless otherwise specified in the terms specified at https://video.ut0pia.org/about and potential licenses granted by each content's rightholder.