NVIDIA Streamline is a middleware SDK that simplifies integrating NVIDIA graphics technologies—including DLSS (super resolution, frame generation, ray reconstruction), Reflex (low latency), NIS (image scaling), DeepDVC (dynamic contrast), and DirectSR—into DirectX 12, 11, and Vulkan games on Windows. It provides a unified API, a plugin-based architecture where each feature is a separate loaded module, and an interposer (hooking) layer that intercepts graphics API calls (DXGI, D3D12, Vulkan) to automatically inject features without requiring game engine modifications. The SDK includes a core infrastructure with parameter sharing, logging, thread management, OTA updates, security verification, and a compute abstraction layer. While primarily an application integration SDK, it is not a research project; all code is production-oriented middleware. The repository is well-structured with clear separation of concerns, but heavily depends on NVIDIA-specific SDKs (NGX, NVAPI, Reflex) and is Windows-only, limiting portability. Build system uses premake5 with a custom packman package manager.