[Error Loops & Bugs] What to do when Lovable breaks your entire site?

Don't panic—use version history to revert: scroll up in chat, press 'View History', select an older stable version and restore it. Restoring creates a new edit card; nothing gets lost. You can reapply changes after reverting. Alternatively, click 'Try to fix' (free), or use Plan mode to carefully investigate before Agent mode tries again.