import type { SessionContinuityMetadata } from "./types.js";
/**
 * Infer a continuity status from an incoming transport event.
 *
 * NOTE: The `"running"` inference for transport "busy" signals (busy, retry,
 * running, queued, working, streaming) is **transport-derived**, not
 * evidence-confirmed. For delegate-task children, the background observer
 * gates these with a start-evidence check before promoting to running.
 *
 * When `requireEvidence` is true, the function will only return `"running"`
 * from transport signals if `existingLastToolActivityAt` is already set
 * (i.e., real tool activity has been observed previously).
 */
export declare function inferContinuityStatusFromEvent(args: {
    event: unknown;
    eventType: string;
    currentStatus?: SessionContinuityMetadata["status"];
    /** When true, "running" from transport signals requires prior tool activity. */
    requireEvidence?: boolean;
    /** The record's current lastToolActivityAt, used only when requireEvidence is true. */
    existingLastToolActivityAt?: number;
}): SessionContinuityMetadata["status"] | undefined;
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