{"type": "article", "title": "Substack's new tool tells you who's been writing their newsletters with AI", "publisher": "Web Pulse", "url": "https://wpnews.pro/news/substack-s-new-tool-tells-you-who-s-been-writing-their-newsletters-with-ai", "original_source": "https://www.machinebrief.com/news/substacks-new-tool-tells-you-whos-been-writing-their-newslet-9e1g", "published": "2026-07-23T00:06:48+00:00", "accessed": "2026-07-23", "id": "substack-s-new-tool-tells-you-who-s-been-writing-their-newsletters-with-ai"}