https://github.com/matrix-org/matrix-spec-proposals/pull/254... is the de-facto way that custom emoji are done today, but as you can see from the labyrinthine Matrix Spec Change, it still needs some work to get stabilised and formally merged into the spec. Meanwhile, folks are always welcome to use experimental MSCs in the wild.
alt Hacker News
https://github.com/matrix-org/matrix-spec-proposals/pull/254... is the de-facto way that custom emoji are done today, but as you can see from the labyrinthine Matrix Spec Change, it still needs some work to get stabilised and formally merged into the spec. Meanwhile, folks are always welcome to use experimental MSCs in the wild.