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Nothing broken, that's a safety check. It refuses to overwrite a file it hasn't seen (first message) or one that changed since it last read it (second message), so it doesn't wipe out your edits.
The second one usually means something else touches files while it works: format-on-save in your editor, a prettier hook, or you typing in the same file. If it's constant, turn off format-on-save for that project and let a hook format after Claude's edits instead.
Format on save in VS Code, yes. Turned it off for this workspace, messages mostly gone. emeka · edited
Nice. A PostToolUse prettier hook gives you the formatting back without the conflict. thandeka · edited