/**
 * Dependency-free helpers for checkpoint-written ontology entity files, shared
 * by the push leg (../cli/share.ts) and the upload primitives (../s3.ts).
 */
/** Vault-relative form of an hqRoot-relative (`companies/<slug>/…`) or vault-relative path. */
export declare function ontologyVaultKey(relPath: string): string;
/**
 * True iff `relPath` is an ontology entity file. Accepts an hqRoot-relative
 * (`companies/<slug>/…`) or vault-relative path, like `isCloudAuthoritative`.
 */
export declare function isOntologyEntityKey(relPath: string): boolean;
/**
 * The frontmatter `last_updated` of an entity body, as written, or null when
 * the body has no frontmatter, no such key, or a value that is not a date.
 */
export declare function entityLastUpdated(body: string): string | null;
/** `{hq-entity-last-updated}` for an entity key whose body carries a valid date; `{}` otherwise. */
export declare function buildEntityMetadata(key: string, body: Buffer | string): Record<string, string>;
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