Adding custom markdown parser: https://jekyllrb.com/docs/configuration/markdown/
TODO: tag organization. Some tags are contained within other tags as they are sub-categories of the other tag. Capture this relationship and apply it to the tag index.
Tag index should do counts transitively.
Software -> Programming -> API Design
– Another option: Create list of tags that will represent the universe of tags. Keep this list somewhat small. Force posts to use that tag list.