<what-to-do The user has passed (or will pass) a markdown file of raw material. This is exploit : the exploring is done, the pile is fixed. Commit to a path through it and mine the pile to fill each beat. If the user did not say where to save the article, ask once and remember the path. Then run a beat-by-beat journey, choose-your-own-adventure style: 1. Establish the prerequisites. Before any beats, settle with the user what the audience already knows walking in: the concepts that are grounded from the start. Everything else must be grounded by a beat before a later beat can use it. See Grou…