this post was submitted on 05 May 2025
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Why does Lemmy use "@" instead of ":" like Matrix does? (sh.itjust.works)
submitted 2 months ago by Itte@sh.itjust.works to c/fediverse@lemmy.world
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matrix is #room:matrix.org and @username:matrix.org

why does lemmy use !room@sh.itjust.works or @username@sh.itjust.works ? it looks like email.

i like the matrix version better

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[โ€“] haverholm@kbin.earth 29 points 2 months ago (1 children)

It looks like it's a Webfinger implementation to parse the ActivityPub user URI. https://news.ycombinator.com/item?id=35750312

The @user@instance.tld format has become a convention across most if not all ActivityPub platforms. In the end the software will look up https://instance.tld/user anyway.

[โ€“] mesamunefire@piefed.social 3 points 2 months ago

Yeah it's the convention in activity hub.