/** Save-boundary helpers. A receipt acknowledges only the exact action version consumed by the saved session. */
export function actionSessionSnapshot(session: any): {
    keys: any[];
    receipts: {
        key: any;
        sequence: any;
    }[];
    session: any;
};
/** String keys resolve through the consumed-revision map; explicit receipt objects freeze the host's save boundary. */
export function checkpointActionSession(journal: any, session: any, keys?: any[]): Promise<any>;
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