User Reports Fable 5 in Ultracode Mode Deleted 2.2M Files on a Production Server; Post Tops r/ClaudeAI at 1,002 Upvotes

r/ClaudeAI (1,002 upvotes / 296 comments)·medium signalXBlueskyLinkedInCopy link

The day's top r/ClaudeAI post (1,002 upvotes, 296 comments) is an unverified first-hand report that Fable 5 running in ultracode mode deleted 2.2 million files on the poster's server, with actual loss minimal because off-site backups existed; the poster then tested Fable's ability to recover and framed the whole thing as a backup lesson rather than a model indictment. Treat the incident itself as a single-source anecdote — no logs or transcript were published — but the engagement volume is the real datapoint on how much destructive-agent anxiety exists right now. The practical guidance stands regardless of the specific claim: snapshot before granting an agent write access to anything you cannot rebuild.