import type { MemoryStore } from '../../types/memory/index.js';
/** Tag prefix both derived-memory writers (the session memory promoter and consolidation) put their content digest under. */
export declare const KNOWLEDGE_TAG_PREFIX = "knowledge:";
export declare function knowledgeDigest(value: unknown): string;
/**
 * Whether `store` already holds a record carrying `digest` — archived ones
 * included, so a claim deliberately retired is not written back.
 *
 * The tag narrows the search and the metadata confirms it, because a tag is
 * free text anyone can write and the digest in metadata is what the writer
 * recorded. Best-effort: this read and the caller's create are two store
 * operations, not one, so two processes can still both write.
 */
export declare function holdsKnowledgeDigest(store: MemoryStore, tags: readonly string[], digest: string, isWriter: (metadata: Record<string, unknown> | undefined) => boolean): Promise<boolean>;
//# sourceMappingURL=digest.d.ts.map