/**
 * InMemoryTopicStore — reference in-memory implementation of
 * {@link TopicStore}.
 *
 * Mirrors the write-time CAS contract of the disk store: every
 * `updateTopic` compares the supplied `ownerVersion` against the persisted
 * copy and rejects with `StaleTopicError` on mismatch. Convention #17:
 * cross-tenant access throws `TenantIsolationError` with no fallback.
 *
 * NZ-TOPIC-01 renamed this from `InMemoryThreadStore` (moved from
 * `store/thread/memory.ts`) and re-exported the old name as an identity
 * binding. NZ-TOPIC-05 removed that re-export, once 28.0.0 had carried the
 * deprecation to the registry — the class is reachable only as
 * `InMemoryTopicStore` now.
 */
import type { TenantId } from '../../types/ids/index.js';
import type { ProjectId, TopicId } from '../../types/session/ids.js';
import type { Topic } from '../../types/topic/entity.js';
import type { CreateTopicParams, TopicStore } from '../../types/topic/store.js';
export declare class InMemoryTopicStore implements TopicStore {
    private readonly topics;
    /** Hydrate existing Topic snapshots without creating new topic identities. */
    constructor(topics?: readonly Topic[]);
    createTopic(params: CreateTopicParams, tenantId: TenantId): Promise<Topic>;
    getTopic(topicId: TopicId, tenantId: TenantId): Promise<Topic | null>;
    updateTopic(topic: Topic, tenantId: TenantId): Promise<void>;
    deleteTopic(topicId: TopicId, tenantId: TenantId): Promise<void>;
    listTopics(projectId: ProjectId, tenantId: TenantId): Promise<readonly Topic[]>;
    private assertTenant;
}
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