The Unity Game Builder Stack turns VonCluer into a game prototyping factory. **What you get:** - Unity MCP bridge (CoplayDev, MIT, free — no Unity subscription needed) - 46 editor tools: GameObject CRUD, C# authoring with compile feedback, Play Mode control, screenshots, async builds - The Unity MCP Pipeline skill: setup guides, tool conventions, Unity 6 API notes, and zero-asset prototyping patterns (runtime sprites, procedural audio) - A 6-point verification checklist that proves the agent's feedback loop before any project work **The workflow it enables:** - Agent scaffolds a playable prototype in days, not weeks - Procedural-first: no art team needed for Gate 0 validation - Screenshot-driven iteration — the agent sees what it builds - Build automation for mac, iOS, and Android targets **Requirements:** Unity 6 LTS (Unity Personal is fine), uv, Python 3.10+, git-lfs. macOS Apple Silicon or Windows.