import type { ObserverStore } from '../../observe/store.ts';
import { type S3Config } from '../../resource/s3/config.ts';
import type { NamespaceStore } from '../mount/namespace/store.ts';
import type { SessionStore } from '../session/store.ts';
import { WorkspaceStateStore, type WorkspaceFields, type WorkspaceStateStoreOverrides } from './base.ts';
/**
 * WorkspaceStateStore hosting the sessions + metadata group on S3.
 *
 * Object layout under one bucket and prefix:
 *
 * - `{prefix}workspaces/{ws}.json` — metadata record
 * - `{prefix}{ws}/sessions/{session_id}.json` — session table
 *
 * Every record write is CAS-gated by a conditional PUT anchored on the
 * compare-read's ETag, giving S3 the same generation contract as the
 * Redis Lua script; bucket versioning (when enabled) doubles as an
 * audit trail for free. This store hosts only the sessions+meta
 * group: namespace nodes and observer events are chatty per-op planes
 * that belong on RAM or Redis, so use this store as the `workspace`
 * group override of a RAM or Redis default store. Mirrors the Python
 * S3WorkspaceStateStore.
 */
export declare class S3WorkspaceStateStore extends WorkspaceStateStore {
    private readonly config;
    private readonly prefix;
    private readonly meta;
    private readonly sessionTables;
    constructor(config: S3Config, overrides?: WorkspaceStateStoreOverrides);
    protected makeNamespace(_workspaceId: string): NamespaceStore;
    protected makeObserver(_workspaceId: string): ObserverStore;
    protected makeSessions(workspaceId: string): SessionStore;
    protected readMeta(workspaceId: string): Promise<WorkspaceFields | null>;
    protected writeMeta(workspaceId: string, fields: WorkspaceFields): Promise<void>;
    protected casWriteMeta(workspaceId: string, fields: WorkspaceFields, expectedGeneration: number): Promise<boolean>;
    protected closeSelf(): Promise<void>;
}
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