Edit: Oh neat it does actually. https://github.com/ArchiveBox/ArchiveBox/wiki/Configuration#...
> Archive method SAVE_READABILITY
> Extract article text, summary, and byline using Mozilla's Readability library. Unlike the other methods, this does not download any additional files, so it's practically free from a disk usage perspective. It works by using any existing downloaded HTML version (e.g. wget, DOM dump, singlefile) and piping it into readability.