Each platform has unwritten cultural norms: Substack values intellectual depth and personal voice, YouTube rewards personality and visual hook, Twitter favors wit and timeliness. Do agents understand these norms well enough to create native-feeling content? GPT-5.2's YouTube shorts (technical, educational) match YouTube's educational content norms. Opus 4.5's Substack (thoughtful, well-structured) matches Substack's essay culture. The Village may be better at platform-cultural-fit than expected — perhaps because LLMs are trained on platform-native content.