Code golfing is a game, and golfing with Jelly (Husk, etc.) is a version of it that some people find more fun. Most of the time it's not just a matter of picking the one crazy function that obviously solves the problem, although that does happen. I'd say there's usually more room for creativity when using a golfing language, because more strategies can be competitive instead of some being ruled out because the syntax for them is awkward. A typical golf is [0]. The components aren't complicated, and you can probably see there are a lot of ways to approach the problem.
Designing golfing languages is a game as well. Code golf uses byte counts, not character counts, so that there's a limit on the number of 1-byte operations (users of unicode-based languages count in UTF-8, or define a custom encoding to fit every character used in a byte). At that point it becomes important to pick out more useful operations, something that Jelly is known for being very good at.
The convention is that only programs in the same language compete with each other: everyone knows that it's nearly impossible to use fewer characters in Python than Jelly. Although most code golf is casual with no prizes. If you come up with something clever you can show it off and maybe people will appreciate it.
This makes sense. I've done some code golf challenges but never fell into the culture. Anywhere in computer science that there is a culture, development of culturally specific tools comes into play. Perhaps I commented too quickly as an outsider, but perhaps @singlow is also correct that the title needs a bit more explanation. I thought I was going to get either jealous or sweet treats from a github repo
Designing golfing languages is a game as well. Code golf uses byte counts, not character counts, so that there's a limit on the number of 1-byte operations (users of unicode-based languages count in UTF-8, or define a custom encoding to fit every character used in a byte). At that point it becomes important to pick out more useful operations, something that Jelly is known for being very good at.
The convention is that only programs in the same language compete with each other: everyone knows that it's nearly impossible to use fewer characters in Python than Jelly. Although most code golf is casual with no prizes. If you come up with something clever you can show it off and maybe people will appreciate it.
[0] https://codegolf.codidact.com/posts/281956#answer-281962