gamestack

First-party foundation (engine-agnostic): the design/discipline brain in four tiers — universal craft (fundamentals, game feel, level design, onboarding, UI/UX, difficulty & balancing, pacing, art direction), technical craft (3D graphics & rendering, shaders & VFX, animation systems, procedural geometry), genre lenses (open-world, RPG, combat, narrative, worldbuilding, permadeath), and technique modules (procgen, AI-authored coherence, systemic/emergent) — plus the headless generate-and-review process and the iteration-loop fidelity procedure (reference→diff→prioritize→generate→verify, human + AI playtester, human checkpoint before scaling a visual change or committing a heavyweight generation), with a concrete worked Godot example in docs/headless-architecture.md (input→verb→seam, test benches, deterministic headless time, a playtest API, CI). Pairs with the engine packs below: design here, implement there.