import type { Engine } from "../shared/types.js";
import type { TurnSurface } from "../sessions/turn/types.js";
export interface StatusReconcilerDeps {
    engines: Map<string, Engine>;
    /** The transport seam a settled turn reports through — the web runner's own, so there is no second emit site. */
    surfaceFor: (sessionId: string) => TurnSurface;
    intervalMs?: number;
    staleMs?: number;
    /** Test override. */
    now?: () => number;
    /** Carry-over between sweeps: sessions seen stuck once. A session is only
     *  reset on the SECOND consecutive sweep that finds it stuck — a single
     *  observation can be the benign seconds between a turn's process exiting
     *  and the gateway persisting its final status. Created by
     *  startStatusReconciler; tests may pass their own. */
    pendingStuck?: Set<string>;
}
/** One sweep: unstick sessions stuck at status:"running" with no live turn, by
 *  settling them through the one completion path. Returns the number settled —
 *  a session whose fence was lost is not a fix. Exported for tests. */
export declare function sweepOnce(deps: StatusReconcilerDeps): Promise<number>;
/** Start the periodic sweep. Returns a stop function. */
export declare function startStatusReconciler(deps: StatusReconcilerDeps): () => void;
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