/** Opaque revision identity for lightweight persistence observations. */
import type { Branded } from '@deepseek-ai/dsh-brand';
/**
 * Backend-owned token that identifies both one storage source and one revision
 * of a persisted session log.
 */
export type SessionPersistenceRevision = Branded<'SessionPersistenceRevision'>;
/**
 * Brand a backend revision for the provider-neutral persistence contract.
 * @param value - backend-owned opaque revision representation.
 * @returns the same runtime string with persistence-revision identity.
 */
export declare function SessionPersistenceRevision(value: string): SessionPersistenceRevision;
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