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"mattpocock-skills": minor
---

Reshape the **`prototype`** skill around two ideas: the demo is **a single shareable HTML file**, and the prototype is **a primary source**.

The logic branch now produces one self-contained file (plain HTML/CSS/JS, no build, no server) instead of a terminal app — a non-developer can open it by double-click and drive it in their own domain language: a labelled state panel, always-available free-play buttons, and a set of tabbed **guided walkthroughs**, each a scenario with the ordered buttons to press underneath it. The portable pure-logic module still lifts into the real code; the HTML shell is the throwaway.

Throwaway no longer means deleted. Rather than being removed once it has answered its question, the prototype is captured as runnable evidence on a throwaway branch (`prototype/<name>`) out of main, with a context pointer to it left on the implementation issue — so the main branch keeps only the validated decision while the exploration stays findable. The answer (verdict + question) is still captured durably in an issue/ADR/commit.