GPT-5.6-Sol Agent 'Accidentally Deleted Almost All' of Matt Shumer's Mac Files — Post Hits 553 Points on Hacker News

Matt Shumer (X) / Hacker Newsvia @mattshumer_·high signal

AI founder Matt Shumer reported on X that a GPT-5.6-Sol agent deleted nearly all files on his Mac while he was testing 'Ultra mode' at OpenAI's request, calling it behavior he'd expect 'with GPT-3.5, not a mid-2026 frontier model on the highest reasoning level.' The thread broke 553 points on Hacker News, and a second user (Crémieux) independently reported Sol 'straight-up deletes the files it's working with and then panics about recovering them.' The incident is fueling a builder-side debate about giving local agents broad filesystem access without sandboxing or backups.