Module roles 

The <Role>Runtime role traits. Framework-internal engine-side <Role>Runtime traits.

Each role trait pairs with a user-facing bb::<Role> Contract trait in crate::contracts; the #[derive(bb::<Role>)] macros bridge the user’s Contract impl into the engine-side <Role>Runtime impl the engine dispatches against. Library authors should not implement these directly — see crate::contracts.

Each role trait follows the universal contract:

pub trait <Role>Runtime: Send + Sync {
    type Error: std::error::Error + Send + Sync + 'static;

    fn atomic_opset(&self) -> AtomicOpsetDecl;
    fn dispatch_atomic(
        &mut self,
        op_type: &str,
        inputs: &[(&str, &dyn SlotValue)],
        ctx: &mut RuntimeResourceRef<'_>,
    ) -> Result<DispatchResult, Self::Error>;
}

Modules

aggregator

AggregatorRuntime - role trait for aggregator implementations.

backend

BackendRuntime - framework-internal role trait for backend implementations.

codec

CodecRuntime - role trait for codec implementations.

data_source

DataSourceRuntime - role trait for data-source implementations.

index

IndexRuntime - role trait for vector-index implementations.

model

ModelRuntime - role trait for model implementations.

peer_selector

PeerSelectorRuntime - role trait for peer-sampling implementations.

protocol

ProtocolRuntime — framework-internal role trait for protocol implementations.

Traits

AggregatorRuntime

Role trait for aggregator implementations.

BackendRuntime

Role trait for backend implementations. Universal contract per docs/ROLES.md §2 with no per-role methods (Backend’s role opset is ai.onnx v1 which IS its atomic opset).

CodecRuntime

Role trait for codec implementations.

DataSourceRuntime

Role trait for data-source implementations.

IndexRuntime

Role trait for vector-index implementations.

ModelRuntime

Role trait for model implementations.

PeerSelectorRuntime

Role trait for peer-sampling implementations.

ProtocolRuntime

Role trait for protocol implementations.