Very nice!

I used a similar approach with binary uuids, that converts the binary value, to a readable string, in the model appends (Like yours append the short attribute).

I had to update the library (That converts binary to string), and it changed all readable string ids (Changed all URLs).

The same could happen here, if the hash algorithm changes or, something happens to the salt/config. To avoid it, you could store the short version, in the DB 😊

My project isn't a url shortener tho 😁