export declare class MemoryResumeAnchorStore {
    private readonly bySession;
    /** Record/overwrite the anchor for one settled message boundary (idempotent upsert; parity with the SQL ON DUPLICATE/CONFLICT). */
    put(sessionId: string, eventId: string, entryId: string, owner: string | null): Promise<void>;
    /** Resolve a shell-supplied eventId → the persisted SessionTreeEntry.id for TaskSpec.resumeAt; undefined = unknown
     *  anchor (the route 4xx's before handing core a bad id). owner null-safe guard = the SQL `owner <=> ?` defense-in-depth. */
    resolve(sessionId: string, eventId: string, owner: string | null): Promise<string | undefined>;
    /** 2c session-sync: ALL anchors for a session (every eventId→entryId + its owner), UNFILTERED — a cross-backend
     *  session EXPORT bundles the whole anchor map so the importer can re-key owner to the target principal (§9). Twin of
     *  the SQL/file stores; kept on all three backends so the ResumeAnchorStore union shares a single contract. */
    listBySession(sessionId: string): Promise<Array<{
        eventId: string;
        entryId: string;
        owner: string | null;
    }>>;
    /** E21 (§0.5 delete) — purge ALL anchors for a session, scoped by session_id ALONE (the route already proved session
     *  ownership; a per-row owner guard would orphan rows stored under a divergent per-run principal). Idempotent (count). */
    deleteBySession(sessionId: string): Promise<number>;
}
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