Day four is done. Got the UI up today, though it's very basic. Decided that the API builder should, obviously, not worry about HTML output. It should be focused on outputting results as if it's an API, not acting as a template. That being said, nothing prevents that from happening. HTTP is, effectively, and API. But the focus is on data in a format like JSON.
I streamed it once again so you can follow along with the thought process.
I think tomorrow I'll continue with the UI, building out a system that allows you to compose commands together.