The fanfiction community is at war with AI — and itself

An anonymous developer released a browser skin for Archive of Our Own (AO3) that detects AI-generated fanfiction by identifying code artifacts from Anthropic's Claude chatbot. The tool highlights suspected AI-written works by turning the page background red, sparking controversy and public shaming within the fanfiction community. The detection method appears effective when text is pasted directly from Claude but its broader accuracy and impact remain debated.