Crate meridian_engine_core 

Runtime: frame scheduler, event system, subsystem manager; ties every other crate into the main loop.

Structs

EventSystem

Workspace-wide event bus.

FrameScheduler

Builds and runs the per-frame job graph across every subsystem.

Runtime

Owns subsystem instances and drives the frame loop.

SubsystemManager

Registry of active subsystems for the current Runtime. The only place in the workspace allowed to know about every *-core at once — see docs/dependency-rules.md rule 7.