The entirety of the redirect URL is contained within the unicode at the end of the short link (ex. ֶ֤ܻׅ֒݅ܿࣿ֠ࣳ࣫ؔؖ)ֻ֑ | for news.ycombinator.com/news)
The links provided are compressed with a custom trained Shoco model and encoded into a selection of Mark Non-Spacing Unicode characters.
The chosen 128 Mark Non-Spacing characters have a property of zero advance width, signifying that the cursor does not advance after each character.
This produces an effect of characters overlapped on top of each other to create a minimal visible length. Each unicode character represents 7 bits
of the compressed redirect URL.
Unfortunately, these shortened links don't play nice with all services (Facebook sometimes flags them), but are pretty close to as visibly
small as a stateless link shortener can get.