Use when starting a new dataviz piece or project — setting up the working directory, tracking decisions and progress, or writing the brief before building. Covers three setup modes depending on the type of work: a change-tracking notepad (any skill), a project directory scaffold (reports, workshops, web dev, plotting projects), and a goals-and-steps brief (technical builds, chart-design decisions, workshop flows, scrollytelling narratives). Provider-agnostic: plain markdown, no tool lock-in.