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I'd love a Codidact-specific markdown extension that links to a post in a particular category. That was really unclear, so let me give an example. A particular site can have a Glossary category with particular pages as entries in the category. Then `[[foo]]` anywhere on the site will link to the "foo" entry in the glossary.

Some use cases:
- Judaism can have a glossary so people can write a term of art like "muktzeh" in a post and simply link it to let people know what it means.
- Cooking can have a Standard Methods category of explanatory posts so a recipe can say `After [[separating the eggs]],…`.

Some details:
- The markdown `[[...]]` is not meant to be final and some other can be chosen. (However, I like it, because it's similar to the `[...]` link markdown.)
- I say `[[foo]]` should link "to the 'foo' entry" and the question is — what's that? Well, most obviously it's the entry whose _title_ is "foo". But it would be really nice to have redirection/canonicalization so that `[[separating the eggs]]` can link to the "separation of eggs" page. How? Perhaps by creating a page as a redirect. Maybe people have better ideas about how to do this.

A response to expected pushback:
- Yes, I know it's possible using a userscript. But don't you want all users, not just those with the script, to be able to see the link?