Robot9000-style originality gate for communities that want anti-repost posting UX.
R9K Challenge runs on a Bitsocial community node and compares normalized post text against the owner node's local comments database. It gives communities a Robot9000-style posting experience without using AI: exact reposts fail before acceptance, backlinks are ignored, repeated failures trigger escalating temporary bans, and accepted-text hashes stay in private local state instead of storing raw post text.