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I like this idea (obviously, clearly it is partly inspired by my post https://judaism.codidact.com/questions/276421 ). A bit of confusion though about "category", "post", etc. A category is a group of posts (e.g,., Q&A or Meta or Recipes or Divrei Torah). I think as initially stated this would be limited to one Category, so if there were 2 within a given community (e.g., a Biography category in Judaism as well as Glossary (not saying we *need* Biography, but just a hypothetical example)) then it would be good to be able to disambiguate (and, I'd argue OK to *always* require, else back to "self" as explained below).

End result would be something like:
`[[glossary:muktzah]]` to link to the *muktzah* named post in the *glossary* category
`[[biography:rambam]]` to link to the *Rambam* named post in the *biography* category
`[[can-i-zoom-on-shabbos]]` to link to the *Can I Zoom on Shabbos* named post in the same (e.g., Q&A in this example) category.

Now this gets to another interesting problem - IDs vs. names. A StackExchange full link includes **both** the ID and the name. But only the ID is really necessary and, more importantly, the name can change. There are a couple of different ways to solve the problem *and keep things simple for non-techie users*:

* Names applied to posts in a "won't change so frequently" way. Normally names of posts are based on titles. Titles can be changed (and often are, for a lot of reasons). If I make the glossary post **muktzah** and someone else decides it must be **muktzeh** we can't have 23 links break. If the original **muktzah** is saved then it will always work (barring later duplicates). However, that would also require users making these links to know where/how to get that *static keyword*.

* When you create a link of this type, the system searches for a match and tries to piece it all together for you. This can work in the opposite way too - paste in a full Codidact link and it will flip it back to this new shortcut category:post format, *with the ID included*. In other words, enter in any of the following:

* `[[glossary:muktzah]]` Exact match of category + post title
* `[[glossary:muktzah]]` Close match - system searches and says "How about..."
* `[[654321]]` ID, which system knows is currently Glossary -> Muktzah
* `[[https://judaism.codidact.com/questions/654321]]` Full link pasted in, which system can now shorten.

and even:

* `https://judaism.codidact.com/questions/654321` The link by itself - system (I think SE does something similar) should be smart enough to *figure it out*.

All (after verification if not an exact match) would shorten to something like:

`[[glossary:654321:muktzah]]`
and all would display *as if they were*:
`[Muktzah](https://judaism.codidact.com/questions/654321)`
displaying just **Muktzah** in a link style.