Game Engine — Native C++20 + .NET 10

100% world state in native C++20 (Flecs / Jolt / Vulkan 1.3 / miniaudio), 0% gameplay state on the .NET GC heap. .NET 10 (hostfxr) is a stateless logic runner mutating native memory zero-copy via Span<T> + delegate* unmanaged[SuppressGCTransition].

End users write Unity-like IComponent scripts. Roslyn Incremental Source Generators compile them to burst-vectorized native chunk loops. Compile-time analyzers forbid hot-path allocations.

Layout

engine-root/
├── docs/            # Architecture roadmap + M1–M5 milestones + orchestration plan
├── scripts/         # bootstrap-github-issues.sh (labels, milestones, issues)
├── native/          # libengine_core (C++20): core, ecs, renderer, physics, audio, bridge
├── managed/         # Engine.Bindings / Runtime / Analyzers / Editor / Cli
├── tools/           # abi_codegen (bridge JSON -> C# bindings)
└── samples/         # Benchmark1M, stress scenes, FPS template

Milestones & Gates

Milestone	Gate
M1 Spine (native ECS + zero-copy host)	1M LocalTransform from C# in <1.5ms, 0 GC bytes
M2 Illusion compiler (Roslyn + hot-reload)	<100ms state-preserving C# hot-reload
M3 GPU-driven Vulkan 1.3 renderer	250k PBR meshes + SDF GI @120+ FPS, <0.5ms CPU
M4 Jolt physics + spatial audio	30k rigidbodies + zero-alloc C# callbacks @60+ FPS
M5 Editor UX + asset pipeline + CLI	<16ms asset streaming, engine-cli IPC, 1-click NativeAOT export

Orchestration (Hermes-native)

• 6 profiles: chief-architect, cpp-ecs-core, dotnet-roslyn-bridge, vulkan-renderer, editor-cli-ux, qa-gate
• Work queue: hermes kanban board game-engine (tasks M1-01…M5-04)
• Memory: lore active; mem0 OSS optional on https://llm.heretek.one/v1 (lemonade/embeddinggemma-2, 768 dims)
• Bootstrap GitHub: ./scripts/bootstrap-github-issues.sh

Start (M1-01)

hermes kanban list --board game-engine
hermes -p cpp-ecs-core -w  # isolated worktree mode for code tasks