How do i add a Category to Category Extensions?

you request it in a forum post or in a post idk

Do a run of it, if it's a reasonable category it will be put under the "pending" tab on the leaderboards. Once 3 or more people have done runs it will be on the main boards (no longer in pending). If anything I said there is wrong please correct me also.

@Shemxat where do i upload this run?

There is a doc to propose the category, where you give all the ideas and the rules of the category with a run (to add it to the leaderboard they need at least 1 run that yes), and if a mod definitely think is not an stupid thing, he will add it to "pending", and then the rest Look at the sticks threads of this forum of this category extrensions, there have to be a thread announcing the doc to submit it