I don't know why people are ignoring the pink elephant here. For medium scale projects, like a Discord app is going to be, LLMs are now at a superhuman level of competence, including on higher level architectural/structural type decisions. I would be beyond surprised if the rewrite wasn't largely done by Claude (or similar). And in this context accessibility is also just a prompt away, if it wasn't included from the get-go, which it probably would have been.

Accessibility isn't just something you one-shot. It takes a lot of back-and-forth and testing with actual screen readers/accessibility scanning tools to be good.