prototype

Installation
SKILL.md

Purpose

This is the concept prototype — a fast, throwaway build that answers one question: "Is this core idea actually fun to interact with?"

Default use — run right after /brainstorm and /setup-engine, before writing GDDs or architecture docs. Its verdict determines whether the concept is worth the investment of full design documentation.

Mid-production? You can also run this at any stage to test a specific mechanic, design change, or technical question. Pass --spike to activate spike mode: a lightweight ~4-hour build with no GDD prerequisites and no phase gate implications.

Already have GDDs and architecture complete? To validate the full game loop before committing to Production, run /vertical-slice instead.


Phase 1: Define the Question

Related skills
Installs
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GitHub Stars
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First Seen
Mar 1, 2026