Mulciber desktop OS layer

mulciber-platform is the experimental desktop OS layer of the Mulciber native game-development stack. It owns native application connections, windows, event pumping, drawable metrics, and borrowed graphics surface targets without imposing a cross-platform windowing framework.

Version 0.5.0 contains peer native AppKit, Win32, Wayland, and X11 implementations exercised by Mulciber's Metal and Vulkan probes. New in this version, Window::set_window_mode and Window::window_mode add a Windowed/Fullscreen intent on all four backends — borderless or native fullscreen on the window's current display, never an exclusive mode — with the reported mode following window-system-confirmed transitions so an application toggle stays correct when the window system enters or leaves fullscreen on its own. The Wayland and X11 fullscreen paths have a tool-automated Linux checkpoint (the native Wayland request path is unit-tested only); the AppKit path is unvalidated, and the Win32 backend — pointer capture and fullscreen alike — is cross-compiled and linted from Linux only and has not yet executed on a Windows machine, so treat it as untested until the recorded validation lands. Display enumeration, multi-window support, and a stable application-facing API remain in progress. The current API is research-stage and may change without compatibility guarantees. On docs.rs, use the target selector to view the implementation available for each operating system.

Development, design contracts, runnable probes, and recorded validation evidence live in the Mulciber repository.