It is based on FEP-e232, on top of which they add a quote control mechanism. I believe that quote controls in decentralized network don't make much sense, and currently I have no plans to implement them, but from a technical perspective, the design is quite good. Hopefully it stays that way
RE: https://mastodon.social/users/MastodonEngineering/statuses/114003104286886445
quotingBringing this highly requested feature to #Mastodon and the fediverse is not as trivial as some might think, but quote posts are coming. Here is our latest write-up about our progress:
nevent1q…p2sn
https://blog.joinmastodon.org/2025/02/bringing-quote-posts-to-mastodon/