Decentralizing Schemes. Tim Bray discusses the challenges faced by decentralized Mastodon in that shared URLs to posts don't take into account people accessing Mastodon via their own instances, which breaks replies/likes/shares etc unless you further copy and paste URLs around yourself.
Tim proposes that the answer is URIs: a registered fedi://mastodon.cloud/@timbray/109508984818551909 scheme could allow Fediverse-aware software to step in and handle those URIs, similar to how mailto: works.
Bluesky have registered at: already, and there's also a web+ap: prefix registered with the intent of covering ActivityPub, the protocol used by Mastodon.
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