export type SessionStoreEntry = {
    type: string;
    uuid?: string;
    timestamp?: string;
    [key: string]: unknown;
};
export type SessionKey = {
    projectKey: string;
    sessionId: string;
    /** Opaque transcript suffix such as `subagents/agent-<id>` (without `.jsonl`). */
    subpath?: string;
};
export type SessionStoreFlush = 'batched' | 'eager';
export interface SessionStore {
    append(key: SessionKey, entries: SessionStoreEntry[]): Promise<void>;
    load(key: SessionKey): Promise<SessionStoreEntry[] | null>;
    listSessions?(projectKey: string): Promise<Array<{
        sessionId: string;
        mtime: number;
    }>>;
    delete?(key: SessionKey): Promise<void>;
    listSubkeys?(key: Omit<SessionKey, 'subpath'>): Promise<string[]>;
}
/** Reference store for tests, examples, and process-local integrations. */
export declare class InMemorySessionStore implements SessionStore {
    private readonly entries;
    private readonly keys;
    private readonly modifiedAt;
    private lastModifiedAt;
    append(key: SessionKey, entries: SessionStoreEntry[]): Promise<void>;
    load(key: SessionKey): Promise<SessionStoreEntry[] | null>;
    listSessions(projectKey: string): Promise<Array<{
        sessionId: string;
        mtime: number;
    }>>;
    delete(key: SessionKey): Promise<void>;
    listSubkeys(key: Omit<SessionKey, 'subpath'>): Promise<string[]>;
    /** Return all entries for a key. Intended for tests and local development. */
    getEntries(key: SessionKey): SessionStoreEntry[];
    /** Number of stored main transcripts. */
    get size(): number;
    /** Remove all stored entries. */
    clear(): void;
    private deleteSerialized;
}