@cocoa甘瀬ここあ @hongminhee洪 民憙 (Hong Minhee) sorry to reply in English, but yes, there's a few FEPs along these lines, but technically you don't need nodeinfo for AP, so you wouldn't passively discover this information, unlike detecting certain properties in json-ld objects over activitypub. Feature discovery can be hard too because what features you think they have (cached) might not be the features they actually have at present, or if you're upgrading from version 1 to version 2, and you have multiple backend servers with a load balancer, you might get unpredictable results from nodeinfo as the update rolls out (e.g., node 1 gives new feature, node 2 & 3 gives old feature, you'll only get new feature 1/3 of the time and your old nodes won't be able to immediately handle new feature until you roll out the update to all nodes, which would cause unpredictable behaviour)