import type { PendingMarker } from "../state/approval-state.js";
/**
 * Stable identity key for a pending marker.
 * Changes when a gate is re-requested in a later round (different requestedAt),
 * but is stable while the gate remains at the same requestedAt.
 */
export declare function markerKey(m: PendingMarker): string;
export declare class ApprovalCursor {
    private readonly projectRoot;
    private readonly sessionId;
    constructor(projectRoot: string, sessionId: string);
    private path;
    /**
     * Read the set of already-announced marker keys.
     * Returns empty set on missing file or malformed JSON — never throws.
     */
    private readFile;
    /**
     * Return the subset of markers not yet announced, and atomically record
     * them as announced for this session. Idempotent: calling again with
     * the same markers returns [].
     */
    filterNew(markers: PendingMarker[]): Promise<PendingMarker[]>;
}
//# sourceMappingURL=approval-cursor.d.ts.map