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prototype

Test a game concept's core interaction loop with a throwaway prototype.

Updated Apr 4, 2026
Search Tags:#hypothesis#design validation#roguelike#MVP scope#game prototyping#engine iteration#decision verdict
One-click install
npx skills add https://github.com/WindXRan/y3td --skill prototype-windxran
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: prototype
Source: https://github.com/WindXRan/y3td/tree/main/.claude/skills/prototype
Command: npx skills add https://github.com/WindXRan/y3td --skill prototype-windxran

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

The prototype skill reduces the risk of building the wrong game by testing whether a core concept is fun to interact with before you invest in GDDs, architecture, or production-level work.

Core Features & Use Cases

  • Hypothesis-driven concept prototyping: Turns a vague idea into a falsifiable hypothesis with an explicit measurable signal to validate or falsify.
  • Path-based rapid validation: Routes the prototype to HTML, Engine, or Paper based on whether the hypothesis is about rules/logic or moment-to-moment feel.
  • Session checkpointing and decision verdicts: Produces a throwaway build and guides the workflow toward a PROCEED, PIVOT, or KILL recommendation, including optional spike mode for ~4-hour targeted testing.

Use Cases

  • Validate core loop fun before writing full GDD and system docs.
  • Run mid-production mechanic or technical spikes without full phase-gate overhead.
  • Quickly choose between “rules matter” (Paper/HTML) and “feel matters” (Engine).

Quick Start

Run the prototype with your concept description using the engine path: prototype "Describe the core gameplay loop and the riskiest assumption" --path engine.

Frequently Asked Questions about prototype

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I validate if my game prototype is fun before writing a full GDD?▼

You validate a game prototype by running a throwaway concept build that tests the core interaction loop, producing a PROCEED, PIVOT, or KILL decision to confirm it is fun before writing a full GDD.

What is the best way to test a game mechanic hypothesis during early development?▼

Testing a game mechanic hypothesis involves turning a vague idea into a falsifiable statement with a measurable signal, then validating or falsifying it through a rapid concept prototype build.

Can I run a 4-hour technical spike for a mid-production mechanic verification?▼

Yes, you can run a targeted technical spike for mid-production mechanic verification using spike mode, which enables approximately 4 hours of focused testing without full phase-gate overhead.

How do I choose between HTML, Engine, and Paper paths for game prototyping?▼

Choose between HTML, Engine, and Paper prototype paths by determining whether your hypothesis focuses on rules and logic, favoring Paper or HTML, or moment-to-moment feel, which requires the Engine path.

When should I not use a throwaway prototype for game design validation?▼

You should avoid throwaway prototyping for game design validation when moving past early-stage concept development, as it specifically targets pre-production hypothesis testing rather than production-level architecture.

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