Unity Game Brief

The first hour of a game or a new feature, before any Unity work: turn one line of idea into a one-page brief, lock the look with images, derive an architecture proposal from the stated constraints (simulation / presentation split, seeded generation, floating origin), write readiness as testable invariants, then build ONE interaction the human can play and react to. Load for "I want to make a game where…", "here's my game idea", "propose an architecture", "what should we build first", "new feature — where do we start", "write the brief", "is this ready to build". Editor pinning, asmdef mechanics and folders are unity-new-project; art generation is codex-visual.