Module host 

Host-side function table given to plug-ins for re-entrant callbacks.

The surface stays explicit: every host service is a concrete function pointer. During alpha, added methods require rebuilding plug-ins to match the host rather than changing the ABI version. This avoids exposing Arc<MessageBus> or any dyn Trait across the boundary.

Structs

ControllerHostContext

Opaque per-instance context the host supplies to controller plug-ins.

ControllerHostVTable

Function table the host passes to every controller plug-in instance.

HostContext

Opaque per-instance context the host supplies at plug-in creation.

HostVTable

Function table the host passes to every plug-in at load time.

Enums

HostLogLevel

Log levels mirrored from the host’s log crate without dragging the crate into the boundary type.