import type { StreamLike } from "./turn.js";
export declare const ASK_TIMING_ENABLED: boolean;
export type PhaseLog = (phase: string) => void;
export declare function createPhaseLog(label: string): PhaseLog;
/**
 * The harness prints its own diagnostics without a clock, which is what the
 * gap needs. Reprint them relative to process start instead.
 */
export declare function reportHarnessDiagnostic(event: {
    level: string;
    subsystem?: string | undefined;
    message: string;
}): void;
/** Marks when each part of a turn's stream arrives, and when it ends. */
export declare function timeStreamParts(stream: StreamLike, phase: PhaseLog): StreamLike;
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