import type { AgentRunEventSink } from "./model-call-context.js";
/** Return the run event sink scoped to the current execution, if configured. */
export declare function getActiveRunEventSink(): AgentRunEventSink | undefined;
/** Return the independently scoped mandatory and public sink lanes. */
export declare function getActiveRunEventSinks(): {
    mandatory: AgentRunEventSink | undefined;
    public: AgentRunEventSink | undefined;
};
/** Scope an operation to a run event sink. */
export declare function runWithRunEventSink<T>(sink: AgentRunEventSink, operation: () => T): T;
/** Scope an operation to a mandatory run event sink without displacing public observers. */
export declare function runWithMandatoryRunEventSink<T>(sink: AgentRunEventSink, operation: () => T): T;
/** Keep a sink active while a lazy async iterable is consumed. */
export declare function scopeAsyncIterableWithRunEventSink<T>(sink: AgentRunEventSink, source: AsyncIterable<T>): AsyncIterable<T>;
/** Keep a mandatory sink active while a lazy async iterable is consumed. */
export declare function scopeAsyncIterableWithMandatoryRunEventSink<T>(sink: AgentRunEventSink, source: AsyncIterable<T>): AsyncIterable<T>;
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