import type { AgentSpan, AgentTrace } from '../types/trace.js';
export interface TraceListWindow {
    from?: Date;
    to?: Date;
    limit?: number;
}
export interface TraceSink {
    write(span: AgentSpan): void | Promise<void>;
    flush?(): Promise<void>;
}
export interface TraceStore extends TraceSink {
    putSpan(span: AgentSpan): void | Promise<void>;
    getTrace(traceId: string): Promise<AgentTrace | null>;
    listTraces(sessionId: string, window?: TraceListWindow): Promise<AgentTrace[]>;
    cleanup?(maxAgeMs: number): Promise<number>;
}
export declare function isTraceStore(sink: TraceSink): sink is TraceStore;
export declare function traceFromSpans(spans: AgentSpan[]): AgentTrace | null;
export declare function cloneSpan(span: AgentSpan): AgentSpan;