2022-12-17 UTC
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@ushuz_ ↩️ 稍微 dig 了一下，mastodon 好像额外加了个叫 Move 的 activity 来迁移关注关系，ActivityPub 协议里没有
https://github.com/mastodon/mastodon/blob/2889c686108e89a87317505f93b841f5a8a6649b/app/serializers/activitypub/move_serializer.rb
https://docs.joinmastodon.org/spec/activitypub/#supported-activities-for-profiles
https://www.w3.org/TR/activitypub/ (twitter.com/_/status/1604205615693561856)