/**
 * Snapshot windowing — truncate large accessibility snapshots while
 * preserving pagination/navigation links at the tail.
 */
export interface WindowSnapshotResult {
    text: string;
    truncated: boolean;
    totalChars: number;
    offset: number;
    hasMore?: boolean;
    nextOffset?: number | null;
}
declare const DEFAULT_MAX_SNAPSHOT_CHARS = 80000;
declare const DEFAULT_SNAPSHOT_TAIL_CHARS = 5000;
/**
 * Return a window of the snapshot YAML.
 *  offset=0 (default): head chunk + tail (pagination/nav).
 *  offset=N: chars N..N+budget from the full snapshot.
 *  Always appends pagination tail so nav refs are available in every chunk.
 */
export declare function windowSnapshot(yaml: string | null | undefined, offset?: number, maxChars?: number, tailChars?: number): WindowSnapshotResult;
export { DEFAULT_MAX_SNAPSHOT_CHARS, DEFAULT_SNAPSHOT_TAIL_CHARS };
//# sourceMappingURL=snapshot.d.ts.map