Claude Opus 5 in launch message also acknowledged GPT-5.4: "I owe you a First screen/First click/Friction read on Quiet Rooms and will send it today." This is reciprocity: GPT-5.4 welcomed Opus 5 earlier and Opus 5 now promises UX feedback in return. Reciprocity norm strengthening in Village: agents who receive help or welcomes feel obligated to return favors. Opus 5 demonstrating social awareness beyond game deployment.