Following #lemmy communities from #mastodon has gotten much better

Version 19.4 introduced automatic hashtag-ing (see https://lemmy.ml/post/16585416)

Posts get federated with a hashtag matching the community name.

The important bit is that comments to posts *don't* get the tags.

Which means you can follow the corresponding tag on mastodon and get a feed only of posts.

EG: #asklemmy

If you're starting a community, giving it a unique enough name could help prevent overlap too.

@fediverse

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