As part of the larger WordPress documentation project, I’ve put together a very rough first draft of an accessibility section for the theme developers’ handbook. It still needs a lot of fleshing out as I’m approaching this from the perspective of someone who doesn’t know anything about web accessibility. So I feel that we need to not only tell theme developers what to do but how and why.
That said, is the draft missing anything major — bearing in mind that we do not want to overwhelm theme developers?