You beat me at it. It took me a few seconds to notice the cat.

J’arrive pas à y accéder. Quand je clique sur le lien, je ne suis pas sur la bonne instance et quand je parcours le forum libre depuis mon instance, je ne trouve pas la publication :(

Hi @[email protected] !
Thank for this article. I look forward to reading more from you.

You said that you're instance calckey.world only has 54 members. It use to have more, but about a year ago the admin asked us to move to sharkey.world as he no longer wanted to host Calckey. It seems like he has kept both domains at the end.

Maybe that's how Lemmy detects crossposting but there is a visual mark of the crosspost in the interface and I have access to a link to the post in the other community that opens in my instance rather than in another instance. That is something very practical that make Lemmy crossposts more than posts with similar content. And that is something I didn't find in Piefed.

I was mistaken. Lemmy only detected automatically the link when title, body and external reference where the same. It did not do it when the title and body was the same on posts without external references.

If I remember correctly, Lemmy matches two posts with the exact same title. I think I don't it by mistake once. Maybe Piefed do the same, maybe it is implemented differently.
Let me check.

So... I made sure to federate [email protected] to feddit.online. I joined it then done the same test : A crosspost from Lemmy to Lemmy with no external reference but a text body and still no crosspost is picked up by Piefed
https://feddit.online/post/166043

Here is another 4-days old post, this time with an external ressource crossposted from Lemmy to Piefed.
It gets pickup as crosspost by Lemmy but unfortunatly not by Piefed
https://feddit.online/post/165962

Watching it from Piefed, I have to way to see that it match a post in another community as it doesn't even refer to the original post using hyperlink.