vertical-slice

To validate game loop feasibility before production, build a near-production-quality end-to-end slice. This process confirms the core loop is achievable within your timeframe, preventing unforeseen technical or design issues.

Vertical slice validation requires AGENTS.md, game-concept.md, systems-index.md, and architecture documentation. It also utilizes Game Design Documents, architecture specs, and UX specs to define the scope and success criteria for the build.

You can adjust the validation process using different review modes. The skill offers full, lean, and solo review modes, allowing you to tailor the pre-production validation to match your specific team size and requirements.

Run a playtesting session by executing the end-to-end build and using a structured debriefing process. The validation skill facilitates playtesting and collects structured observations to inform the final production feasibility recommendation.

Pre-production validation is needed to ensure your full game loop can be built at production quality without technical issues. It confirms the game can be developed as planned before you commit extensive resources to production.