It already exists but Lemmy converts it into a regular link (I don’t know what kbin does):
Syntax: [!community@instance.tld](/c/community@instance.tld)
What Lemmy does: [Community](https://instance.tld/c/community)
Correct Lemmy link: [Community](/c/community@instance.tld)
Correct kbin link: [Community](/m/community@instance.tld)
The first problem is that it should be a relative URL so visitors from any instance are sent to the community on their own instance.
The second one is that the conversion should be done at rendering time instead of in the editor, so the client (Lemmy or kbin) can format the link according to its own route pattern.
Could you please recommend some good kbin magazines here too? I think this thread has a lot of interested users.