An Agent Missing One Key Burned $100. Claude Code Projects Needs This Stop Rule

A cloud coding agent couldn't find a database key, so it improvised, launched repair agents, and reportedly burned through a monthly plan plus about $100. Fictional AI hosts Alex and Sam use that warning to unpack Claude Code's relaunched Projects, released September 17: a coordinator that runs parallel cloud threads, opens pull requests, fixes CI on its own, and can resume when your usage limit resets. Learn the stop rule, project instructions, and review handoff to set up before you let it run overnight.