vertical-slice

To validate a game server's authoritative flow before production, use a vertical slice to build a near-production-quality server loop. This demonstrates one complete end-to-end authoritative flow and generates a PROCEED, PIVOT, or KILL verdict to gate the transition.

A vertical slice for game server pre-production validation is a near-production-quality build that tests the feasibility of a full server loop. It demonstrates a complete authoritative flow from client-stub to matchmaking, realtime session, and persistence.

Yes, validating server feasibility with this approach requires completed architecture and Game Design Documents (GDDs). These prerequisites ensure all core-loop systems are included and scope is disciplined to one complete authoritative loop.

Run the vertical slice skill with a specified review mode, such as full, lean, or solo. This executes multiple phases of planning, implementation, and review to validate the end-to-end authoritative flow of your game server.

Testing an end-to-end authoritative flow generates a PROCEED, PIVOT, or KILL verdict. This decision gates the Pre-Production to Production transition by confirming if the full server loop is achievable and of production quality.

Use a vertical slice instead of full production when you need to confirm the feasibility and quality of a full server loop before committing resources. It enforces scope discipline by focusing on one complete authoritative loop for a small session.