Struct HostDependencies 

pub struct HostDependencies {
    pub event_store: Arc<dyn EventStore>,
    pub cancel_token: CancellationToken,
    pub subagent_semaphore: Option<Arc<Semaphore>>,
}

Runtime dependencies created by the host when a worker is started.

These are not durable — they are constructed fresh each time and do not survive worker restarts. The orchestration layer is responsible for providing them.

Note: the event authority is intentionally absent — crate::tools::ToolContext::from_seed constructs it internally from ToolContextSeed::sequence_offset to guarantee monotonic sequencing.

Fields

event_store: Arc<dyn EventStore>

Authoritative event store for persisting tool-originated events.

cancel_token: CancellationToken

Token for cooperative cancellation.

subagent_semaphore: Option<Arc<Semaphore>>

Optional concurrency limiter for subagent spawning.