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In Filament v3, $arguments is only injected when an action is executed (clicked), not when it's rendered. Using $arguments in label(), icon(), color() and visible() closures causes ErrorException: Undefined variable $arguments on every Livewire update, including on the create page. Simplified extraItemAction to static label/icon/color; all dynamic logic (publish vs sync, guard for unsaved items) stays in action(). Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>