prototype

Installation
Summary

Throwaway code that answers a single design or logic question through an interactive prototype.

  • Choose between two branches: a terminal app for testing state machines and business logic, or multiple toggleable UI variations on a single route for design exploration
  • Minimal setup with one command to run; state lives in memory with no persistence unless the question explicitly requires it
  • Surface full state after every action so changes are immediately visible and the prototype's answer is clear
  • Delete or fold validated decisions back into production code once the question is answered; capture the verdict before cleanup
SKILL.md

Prototype

A prototype is throwaway code that answers a question. The question decides the shape.

Pick a branch

Identify which question is being answered — from the user's prompt, the surrounding code, or by asking if the user is around:

  • "Does this logic / state model feel right?"LOGIC.md. Build a tiny interactive terminal app that pushes the state machine through cases that are hard to reason about on paper.
  • "What should this look like?"UI.md. Generate several radically different UI variations on a single route, switchable via a URL search param and a floating bottom bar.

The two branches produce very different artifacts — getting this wrong wastes the whole prototype. If the question is genuinely ambiguous and the user isn't reachable, default to whichever branch better matches the surrounding code (a backend module → logic; a page or component → UI) and state the assumption at the top of the prototype.

Rules that apply to both

Installs
165.4K
GitHub Stars
128.0K
First Seen
May 6, 2026
prototype — mattpocock/skills