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submitted 2 weeks ago* (last edited 2 weeks ago) by [email protected] to c/[email protected]

@fediverse Have you ever wondered how Lemmy and Mastodon federate?

Well, I made a few tests and put it all in an easy to read table! Take a look!

https://gist.github.com/helloyanis/c201908666b2c6341e05f7e77b2fbca2

Some things may be wrong or missing but if you notice that, tell me and I'll update it!

(Yeah! I'm even posting this from Mastodon! How cool is that?)

#fediverse #mastodon #lemmy #federation

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[-] [email protected] 15 points 2 weeks ago

They can indeed federate, but IMO it's not useful beyond simple posts.

There is no way to "sync" the text heading/URL/thumbnail.

[-] [email protected] 2 points 2 weeks ago* (last edited 2 weeks ago)

@Skiluros What do you mean by sync exactly?

[-] [email protected] 5 points 2 weeks ago

Where the fields in a Lemmy post (heading/URL/Thumbnail URL) are inputted correctly from a Mastodon post. URL is not even possible unless it's part of the body.

[-] [email protected] 2 points 2 weeks ago

@Skiluros Heading URL is the 1st line of your mastodon post.
You can join an image to your mastodon comment and it will show on lemmy (a new post will just show the link to the post)
For URL and thumbnail I don't think you can.

[-] [email protected] 5 points 2 weeks ago

IIRC, when the URL (on the Mastodon side) is the first line, it pushes a text URL as the heading in Lemmy.

Image attachments work too, if you're only using images.

The issue is you can't have a Lemmy URL, a text heading and a custom thumbnail image in a single post.

This creates problems if you have both a Lemmy community and a Mastodon account and you want post only from the Mastodon account (with the post also going to Lemmy).

I spent a lot of time experimenting with this and I couldn't find a good solution. I stick to posting to Lemmy and Mastodon using separate accounts.

[-] [email protected] 7 points 2 weeks ago* (last edited 2 weeks ago)

This is a neat overview!! I like to federate my posts from microblogs as well, and did some tests.

Here are a few of my notes:

Viewing communities (from Mastodon) - that kind of depends? All communities I follow show up with their posts intact on mastodon (.social), but not when I use a different instance (e.g. mastodon.de) or software (examples: RenPy, Otome Games)

Viewing profiles (from Mastodon) - That also seems to depend on the instance. For example, here's my profile as seen from mastodon.social. Viewing it from my Mastodon account, I can see all of the original posts and replies.

[-] [email protected] 0 points 2 weeks ago

@Berin
Here's how yours look for me.
Notice how it says 0 message on top, but can still see your posts?

Maybe you need to follow someone from the remote instance so they know each other and can federate. That's just a guess.

image/jpeg

[-] [email protected] 2 points 2 weeks ago

That could be the case! I do follow my lemmy-account from mastodon, (and the communities I mentioned as well).

[-] [email protected] 3 points 2 weeks ago

thanks a bunch for your contribution <3

[-] [email protected] 1 points 2 weeks ago* (last edited 2 weeks ago)

@Binette Awesome, glad you like it!!

[-] [email protected] 1 points 1 week ago

Would be great to have all posts on the frontpage of mastodon.social automatical federated to a community in feddit.org
(Like rss feed.) So I don't have to use two Apps/Browser-Tabs and have all Information in one App/Browser-Tab.

[-] [email protected] 1 points 1 week ago

@MrFloppy I agree! I sometimes received notifications on Mastodon from comments by Lemmy accounts on this post but far from with all comments (~10%) and sometimes my replies on Mastodon didn't carry over to Lemmy (I don't even know if this one will!) so there's still work to be done to get things working just right!

[-] [email protected] 1 points 1 week ago* (last edited 1 week ago)

I think this would be a great opportunity to get some of the work from Mastodon to feddit.org>comics_auf_deutsch But just when it's automated, that it's automatically send from Mastodon to feddit.

[-] [email protected] 1 points 2 weeks ago* (last edited 2 weeks ago)

Nice. Now try PieFed and MBin ๐Ÿ˜Š They should have some more compatibility beyond their own niche.

this post was submitted on 15 May 2025
74 points (98.7% liked)

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