/**
 * InMemoryThreadPersistence — the dev/test binding of
 * {@link ThreadPersistencePort}. Same contract as any real binding (run
 * the suite in `@guuey/threads/testing` to prove yours), including the
 * two conditional-write guards and the null-preview no-touch semantics.
 */
import type { ThreadMessageRow, ThreadPersistencePort, ThreadRow, ThreadSnapshotRow } from "./rows.js";
export declare class InMemoryThreadPersistence implements ThreadPersistencePort {
    readonly threads: Map<string, ThreadRow>;
    readonly messages: ThreadMessageRow[];
    readonly snapshots: Map<string, ThreadSnapshotRow>;
    getThread(threadId: string): Promise<ThreadRow | undefined>;
    createThread(row: ThreadRow): Promise<void>;
    incrementSeq(threadId: string, preview: string | null, atIso: string): Promise<number>;
    putMessage(row: ThreadMessageRow): Promise<void>;
    listRecentMessages(threadId: string, limit: number): Promise<ThreadMessageRow[]>;
    findByClientMessageId(threadId: string, clientMessageId: string): Promise<ThreadMessageRow | undefined>;
    getSnapshot(threadId: string): Promise<ThreadSnapshotRow | undefined>;
    putSnapshot(row: ThreadSnapshotRow): Promise<void>;
}
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