Derek, that is part of the fun. I cover how to inject the OG tags when rendering the article. With regards to RSS, it is not a breaking deal for me at the moment. The freedom I get authoring and publishing articles in the same manner that I code makes all the difference for me. With that said, not everyone will share that view which is welcomed.
Don’t get me wrong, I wrote my own SSG too (ok, just a few old crufty perl scripts I threw together years ago, but still)
I only want to say that if your blog had better semantics in the meta data, your blog could be more accessible. For example, you have a tagging system, but the tags was not exposed through the article:tag meta. Compare to the main effort of your blogging system, these things are easy, like one line of code easy, so I was trying to give you a friendly nudge.