Sinoru focused on backend development for the misskey-dev/misskey repository, addressing a targeted bug in relay handling of Announce activities to improve federation correctness and stream consistency. By updating RelayService.ts using TypeScript, Sinoru ensured that relay-delivered Announce activities reference the target note URI for federation checks and deduplication, and that such notes are published directly to the notes stream without creating unnecessary renotes. This technical approach reduced duplication and potential inconsistencies across federated instances. Sinoru’s work demonstrated skills in API development, backend logic, and collaborative code contributions, resulting in improved reliability and a cleaner publishing flow for Misskey users.